[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/asottile/pyupgrade: v3.15.2 → v3.16.0](https://github.com/asottile/pyupgrade/compare/v3.15.2...v3.16.0)
- [github.com/hhatto/autopep8: v2.2.0 → v2.3.1](https://github.com/hhatto/autopep8/compare/v2.2.0...v2.3.1)
- [github.com/PyCQA/flake8: 7.0.0 → 7.1.0](https://github.com/PyCQA/flake8/compare/7.0.0...7.1.0)

.github/workflows/build.yaml

@@ -33,7 +33,7 @@ jobs:
 
       - name: Build and install wheel
         run: |
-          python -m build
+          tox run -m build
           python -m pip install dist/*.whl
 
       - name: tox

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
 -   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.4.0
+    rev: v4.6.0
     hooks:
     -   id: trailing-whitespace
     -   id: end-of-file-fixer
@@ -10,38 +10,39 @@ repos:
     -   id: name-tests-test
     -   id: requirements-txt-fixer
 -   repo: https://github.com/asottile/setup-cfg-fmt
-    rev: v2.2.0
+    rev: v2.5.0
     hooks:
     -   id: setup-cfg-fmt
--   repo: https://github.com/asottile/reorder_python_imports
+-   repo: https://github.com/asottile/reorder-python-imports
-    rev: v3.9.0
+    rev: v3.13.0
     hooks:
     -   id: reorder-python-imports
         args: [--py38-plus, --add-import, 'from __future__ import annotations']
 -   repo: https://github.com/asottile/add-trailing-comma
-    rev: v2.4.0
+    rev: v3.1.0
     hooks:
     -   id: add-trailing-comma
         args: [--py36-plus]
 -   repo: https://github.com/asottile/dead
-    rev: v1.5.0
+    rev: v1.5.2
     hooks:
     -   id: dead
 -   repo: https://github.com/asottile/pyupgrade
-    rev: v3.3.1
+    rev: v3.16.0
     hooks:
     -   id: pyupgrade
         args: [--py38-plus]
--   repo: https://github.com/pre-commit/mirrors-autopep8
+        exclude: tests
-    rev: v2.0.2
+-   repo: https://github.com/hhatto/autopep8
+    rev: v2.3.1
     hooks:
     -   id: autopep8
 -   repo: https://github.com/PyCQA/flake8
-    rev: 6.0.0
+    rev: 7.1.0
     hooks:
     -   id: flake8
-        additional_dependencies: [flake8-encodings, flake8-warnings, flake8-builtins, flake8-length, flake8-print]
+        additional_dependencies: [flake8-encodings, flake8-warnings, flake8-builtins, flake8-print]
 -   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.2.0
+    rev: v1.10.0
     hooks:
     -   id: mypy

README.md

@@ -29,14 +29,14 @@ $ python -m settngs
 Hello lordwelch
 $ python -m settngs -v
 Hello lordwelch
-merged_namespace.values.example_verbose=True
+merged_namespace.values.Example_Group__verbose=True
 $ python -m settngs -v -s
 Hello lordwelch
 Successfully saved settings to settings.json
-merged_namespace.values.example_verbose=True
+merged_namespace.values.Example_Group__verbose=True
 $ python -m settngs
 Hello lordwelch
-merged_namespace.values.example_verbose=True
+merged_namespace.values.Example_Group__verbose=True
 $ cat >settings.json << EOF
 {
   "example": {
@@ -64,7 +64,7 @@ Hello world
 settngs.json at the end:
 ```json
 {
-  "example": {
+  "Example Group": {
     "hello": "world",
     "verbose": false
   },

pyproject.toml

@@ -0,0 +1,6 @@
+[build-system]
+requires = ["setuptools>=42", "wheel", "setuptools_scm[toml]>=3.4"]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools_scm]
+local_scheme = "no-local-version"

setup.cfg

@@ -31,7 +31,7 @@ exclude =
 settngs = py.typed
 
 [tox:tox]
-envlist = py3.8,py3.9,py3.10,py3.11,pypy3
+envlist = py3.8,py3.9,py3.10,py3.11,py3.12,pypy3
 
 [testenv]
 deps = -rrequirements-dev.txt
@@ -78,6 +78,8 @@ max_line_length = 120
 [flake8]
 extend-ignore = E501, A003
 max_line_length = 120
+per-file-ignores =
+    *_test.py: LN001
 
 [coverage:run]
 plugins = covdefaults
@@ -88,6 +90,7 @@ fail_under = 95
 [mypy]
 check_untyped_defs = true
 disallow_any_generics = true
+warn_return_any = true
 disallow_incomplete_defs = true
 disallow_untyped_defs = true
 no_implicit_optional = true
@@ -95,7 +98,9 @@ warn_redundant_casts = true
 warn_unused_ignores = true
 
 [mypy-testing.*]
+warn_return_any = false
 disallow_untyped_defs = false
 
 [mypy-tests.*]
+warn_return_any = false
 disallow_untyped_defs = false

testing/settngs.py

@@ -15,52 +15,52 @@ example: list[tuple[list[str], str, str]] = [
     (
         ['--hello', 'lordwelch', '-s'],
         'Hello lordwelch\nSuccessfully saved settings to settings.json\n',
-        '{\n  "example": {\n    "hello": "lordwelch",\n    "verbose": false\n  },\n  "persistent": {\n    "test": false\n  }\n}\n',
+        '{\n  "Example Group": {\n    "hello": "lordwelch",\n    "verbose": false\n  },\n  "persistent": {\n    "test": false\n  }\n}\n',
     ),
     (
         [],
         'Hello lordwelch\n',
-        '{\n  "example": {\n    "hello": "lordwelch",\n    "verbose": false\n  },\n  "persistent": {\n    "test": false\n  }\n}\n',
+        '{\n  "Example Group": {\n    "hello": "lordwelch",\n    "verbose": false\n  },\n  "persistent": {\n    "test": false\n  }\n}\n',
     ),
     (
         ['-v'],
-        'Hello lordwelch\nmerged_namespace.values.example_verbose=True\n',
+        'Hello lordwelch\nmerged_namespace.values.Example_Group__verbose=True\n',
-        '{\n  "example": {\n    "hello": "lordwelch",\n    "verbose": false\n  },\n  "persistent": {\n    "test": false\n  }\n}\n',
+        '{\n  "Example Group": {\n    "hello": "lordwelch",\n    "verbose": false\n  },\n  "persistent": {\n    "test": false\n  }\n}\n',
     ),
     (
         ['-v', '-s'],
-        'Hello lordwelch\nSuccessfully saved settings to settings.json\nmerged_namespace.values.example_verbose=True\n',
+        'Hello lordwelch\nSuccessfully saved settings to settings.json\nmerged_namespace.values.Example_Group__verbose=True\n',
-        '{\n  "example": {\n    "hello": "lordwelch",\n    "verbose": true\n  },\n  "persistent": {\n    "test": false\n  }\n}\n',
+        '{\n  "Example Group": {\n    "hello": "lordwelch",\n    "verbose": true\n  },\n  "persistent": {\n    "test": false\n  }\n}\n',
     ),
     (
         [],
-        'Hello lordwelch\nmerged_namespace.values.example_verbose=True\n',
+        'Hello lordwelch\nmerged_namespace.values.Example_Group__verbose=True\n',
-        '{\n  "example": {\n    "hello": "lordwelch",\n    "verbose": true\n  },\n  "persistent": {\n    "test": false\n  }\n}\n',
+        '{\n  "Example Group": {\n    "hello": "lordwelch",\n    "verbose": true\n  },\n  "persistent": {\n    "test": false\n  }\n}\n',
     ),
     (
         ['manual settings.json'],
-        'Hello lordwelch\nmerged_namespace.values.example_verbose=True\n',
+        'Hello lordwelch\nmerged_namespace.values.Example_Group__verbose=True\n',
-        '{\n  "example": {\n    "hello": "lordwelch",\n    "verbose": true\n  },\n  "persistent": {\n    "test": false,\n    "hello": "world"\n  }\n}\n',
+        '{\n  "Example Group": {\n    "hello": "lordwelch",\n    "verbose": true\n  },\n  "persistent": {\n    "test": false,\n    "hello": "world"\n  }\n}\n',
     ),
     (
         ['--no-verbose', '-t'],
         'Hello lordwelch\n',
-        '{\n  "example": {\n    "hello": "lordwelch",\n    "verbose": true\n  },\n  "persistent": {\n    "test": false,\n    "hello": "world"\n  }\n}\n',
+        '{\n  "Example Group": {\n    "hello": "lordwelch",\n    "verbose": true\n  },\n  "persistent": {\n    "test": false,\n    "hello": "world"\n  }\n}\n',
     ),
     (
         ['--no-verbose', '-s', '-t'],
         'Hello lordwelch\nSuccessfully saved settings to settings.json\n',
-        '{\n  "example": {\n    "hello": "lordwelch",\n    "verbose": false\n  },\n  "persistent": {\n    "test": true,\n    "hello": "world"\n  }\n}\n',
+        '{\n  "Example Group": {\n    "hello": "lordwelch",\n    "verbose": false\n  },\n  "persistent": {\n    "test": true,\n    "hello": "world"\n  }\n}\n',
     ),
     (
         ['--hello', 'world', '--no-verbose', '--no-test', '-s'],
         'Hello world\nSuccessfully saved settings to settings.json\n',
-        '{\n  "example": {\n    "hello": "world",\n    "verbose": false\n  },\n  "persistent": {\n    "test": false,\n    "hello": "world"\n  }\n}\n',
+        '{\n  "Example Group": {\n    "hello": "world",\n    "verbose": false\n  },\n  "persistent": {\n    "test": false,\n    "hello": "world"\n  }\n}\n',
     ),
     (
         [],
         'Hello world\n',
-        '{\n  "example": {\n    "hello": "world",\n    "verbose": false\n  },\n  "persistent": {\n    "test": false,\n    "hello": "world"\n  }\n}\n',
+        '{\n  "Example Group": {\n    "hello": "world",\n    "verbose": false\n  },\n  "persistent": {\n    "test": false,\n    "hello": "world"\n  }\n}\n',
     ),
 ]
 success = [
@@ -77,13 +77,15 @@ success = [
             'cmdline': True,
             'const': None,
             'default': None,
+            'setting_name': 'test_setting',  # dest is calculated by Setting and is not used by argparse
             'dest': 'test_setting',  # dest is calculated by Setting and is not used by argparse
             'display_name': 'test_setting',  # defaults to dest
             'exclusive': False,
             'file': True,
+            'flag': True,
             'group': 'tst',
             'help': None,
-            'internal_name': 'tst_test_setting',  # Should almost always be "{group}_{dest}"
+            'internal_name': 'tst__test_setting',  # Should almost always be "{group}__{dest}"
             'metavar': 'TEST_SETTING',  # Set manually so argparse doesn't use TST_TEST
             'nargs': None,
             'required': None,
@@ -94,7 +96,7 @@ success = [
                 'choices': None,
                 'const': None,
                 'default': None,
-                'dest': 'tst_test_setting',
+                'dest': 'tst__test_setting',
                 'help': None,
                 'metavar': 'TEST_SETTING',
                 'nargs': None,
@@ -117,13 +119,15 @@ success = [
             'cmdline': True,
             'const': None,
             'default': None,
+            'setting_name': 'test',  # setting_name is calculated by Setting and is not used by argparse
             'dest': 'testing',  # dest is calculated by Setting and is not used by argparse
             'display_name': 'testing',  # defaults to dest
             'exclusive': False,
             'file': True,
+            'flag': True,
             'group': 'tst',
             'help': None,
-            'internal_name': 'tst_testing',  # Should almost always be "{group}_{dest}"
+            'internal_name': 'tst__testing',  # Should almost always be "{group}__{dest}"
             'metavar': 'TESTING',  # Set manually so argparse doesn't use TST_TEST
             'nargs': None,
             'required': None,
@@ -134,7 +138,7 @@ success = [
                 'choices': None,
                 'const': None,
                 'default': None,
-                'dest': 'tst_testing',
+                'dest': 'tst__testing',
                 'help': None,
                 'metavar': 'TESTING',
                 'nargs': None,
@@ -156,13 +160,15 @@ success = [
             'cmdline': True,
             'const': None,
             'default': None,
+            'setting_name': 'test',  # dest is calculated by Setting and is not used by argparse
             'dest': 'test',  # dest is calculated by Setting and is not used by argparse
             'display_name': 'test',  # defaults to dest
             'exclusive': False,
             'file': True,
+            'flag': True,
             'group': 'tst',
             'help': None,
-            'internal_name': 'tst_test',  # Should almost always be "{group}_{dest}"
+            'internal_name': 'tst__test',  # Should almost always be "{group}__{dest}"
             'metavar': 'TEST',  # Set manually so argparse doesn't use TST_TEST
             'nargs': None,
             'required': None,
@@ -173,7 +179,7 @@ success = [
                 'choices': None,
                 'const': None,
                 'default': None,
-                'dest': 'tst_test',
+                'dest': 'tst__test',
                 'help': None,
                 'metavar': 'TEST',
                 'nargs': None,
@@ -196,13 +202,15 @@ success = [
             'cmdline': True,
             'const': None,
             'default': None,
+            'setting_name': 'test',  # dest is calculated by Setting and is not used by argparse
             'dest': 'test',  # dest is calculated by Setting and is not used by argparse
             'display_name': 'test',  # defaults to dest
             'exclusive': False,
             'file': True,
+            'flag': True,
             'group': 'tst',
             'help': None,
-            'internal_name': 'tst_test',  # Should almost always be "{group}_{dest}"
+            'internal_name': 'tst__test',  # Should almost always be "{group}__{dest}"
             'metavar': None,  # store_true does not get a metavar
             'nargs': None,
             'required': None,
@@ -213,7 +221,7 @@ success = [
                 'choices': None,
                 'const': None,
                 'default': None,
-                'dest': 'tst_test',
+                'dest': 'tst__test',
                 'help': None,
                 'metavar': None,
                 'nargs': None,
@@ -235,13 +243,15 @@ success = [
             'cmdline': True,
             'const': None,
             'default': None,
+            'setting_name': 'test',
             'dest': 'test',
             'display_name': 'test',  # defaults to dest
             'exclusive': False,
             'file': True,
+            'flag': True,
             'group': 'tst',
             'help': None,
-            'internal_name': 'tst_test',
+            'internal_name': 'tst__test',
             'metavar': 'TEST',
             'nargs': None,
             'required': None,
@@ -252,7 +262,7 @@ success = [
                 'choices': None,
                 'const': None,
                 'default': None,
-                'dest': 'tst_test',
+                'dest': 'tst__test',
                 'help': None,
                 'metavar': 'TEST',
                 'nargs': None,
@@ -274,18 +284,20 @@ success = [
             'cmdline': True,
             'const': None,
             'default': None,
+            'setting_name': 'test',
             'dest': 'test',
             'display_name': 'test',  # defaults to dest
             'exclusive': False,
             'file': True,
+            'flag': False,
             'group': 'tst',
             'help': None,
-            'internal_name': 'tst_test',
+            'internal_name': 'tst__test',
             'metavar': 'TEST',
             'nargs': None,
             'required': None,
             'type': None,
-            'argparse_args': ('tst_test',),
+            'argparse_args': ('tst__test',),
             'argparse_kwargs': {
                 'action': None,
                 'choices': None,
@@ -311,10 +323,12 @@ success = [
             'cmdline': True,
             'const': None,
             'default': None,
+            'setting_name': 'test',
             'dest': 'test',
             'display_name': 'test',  # defaults to dest
             'exclusive': False,
             'file': True,
+            'flag': True,
             'group': '',
             'help': None,
             'internal_name': 'test',  # No group, leading _ is stripped

tests/settngs_test.py

@@ -1,8 +1,12 @@
 from __future__ import annotations
 
 import argparse
+import ast
 import json
+import pathlib
+import sys
 from collections import defaultdict
+from typing import Generator
 
 import pytest
 
@@ -13,8 +17,47 @@ from testing.settngs import failure
 from testing.settngs import success
 
 
+if sys.version_info >= (3, 10):  # pragma: no cover
+    List = list
+    Set = set
+    help_output = '''\
+usage: __main__.py [-h] [TEST ...]
+
+positional arguments:
+  TEST
+
+options:
+  -h, --help  show this help message and exit
+'''
+elif sys.version_info < (3, 9):  # pragma: no cover
+    from typing import List
+    from typing import Set
+    help_output = '''\
+usage: __main__.py [-h] [TEST [TEST ...]]
+
+positional arguments:
+  TEST
+
+optional arguments:
+  -h, --help  show this help message and exit
+'''
+
+else:  # pragma: no cover
+    List = list
+    Set = set
+    help_output = '''\
+usage: __main__.py [-h] [TEST ...]
+
+positional arguments:
+  TEST
+
+optional arguments:
+  -h, --help  show this help message and exit
+'''
+
+
 @pytest.fixture
-def settngs_manager():
+def settngs_manager() -> Generator[settngs.Manager, None, None]:
     manager = settngs.Manager()
     yield manager
 
@@ -53,92 +96,313 @@ def test_add_setting(settngs_manager):
     assert settngs_manager.add_setting('--test') is None
 
 
-def test_get_defaults(settngs_manager):
+def test_add_setting_invalid_name(settngs_manager):
-    settngs_manager.add_setting('--test', default='hello')
+    with pytest.raises(Exception, match='Cannot use test¥ in a namespace'):
-    defaults, _ = settngs_manager.defaults()
+        assert settngs_manager.add_setting('--test¥') is None
-    assert defaults['']['test'] == 'hello'
 
 
-def test_get_defaults_namespace(settngs_manager):
+def test_sub_group(settngs_manager):
-    settngs_manager.add_setting('--test', default='hello')
+    with pytest.raises(Exception, match='Sub groups are not allowed'):
-    defaults, _ = settngs_manager.get_namespace(settngs_manager.defaults())
+        settngs_manager.add_group('tst', lambda parser: parser.add_group('tst', lambda parser: parser.add_setting('--test2', default='hello')))
-    assert defaults.test == 'hello'
+
+
+def test_sub_persistent_group(settngs_manager):
+    with pytest.raises(Exception, match='Sub groups are not allowed'):
+        settngs_manager.add_persistent_group('tst', lambda parser: parser.add_persistent_group('tst', lambda parser: parser.add_setting('--test2', default='hello')))
+
+
+def test_redefine_persistent_group(settngs_manager):
+    settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test2', default='hello'))
+    with pytest.raises(Exception, match='Group already exists and is not persistent'):
+        settngs_manager.add_persistent_group('tst', None)
+
+
+def test_exclusive_group(settngs_manager):
+    settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'), exclusive_group=True)
+    settngs_manager.create_argparser()
+    args = settngs_manager.argparser.parse_args(['--test', 'never'])
+    assert args.tst__test == 'never'
+
+    with pytest.raises(SystemExit):
+        settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test2', default='hello'), exclusive_group=True)
+        settngs_manager.create_argparser()
+        args = settngs_manager.argparser.parse_args(['--test', 'never', '--test2', 'never'])
+
+
+def test_files_group(capsys, settngs_manager):
+    settngs_manager.add_group('runtime', lambda parser: parser.add_setting('test', default='hello', nargs='*'))
+    settngs_manager.create_argparser()
+    settngs_manager.argparser.print_help()
+    captured = capsys.readouterr()
+    assert captured.out == help_output
+
+
+def test_setting_without_group(capsys, settngs_manager):
+    settngs_manager.add_setting('test', default='hello', nargs='*')
+    settngs_manager.create_argparser()
+    settngs_manager.argparser.print_help()
+    captured = capsys.readouterr()
+    assert captured.out == help_output
+
+
+class TestValues:
+
+    def test_invalid_normalize(self, settngs_manager):
+        with pytest.raises(ValueError) as excinfo:
+            settngs_manager.add_setting('--test', default='hello')
+            defaults, _ = settngs_manager.normalize_config({}, file=False, cmdline=False)
+        assert str(excinfo.value) == 'Invalid parameters: you must set either file or cmdline to True'
+
+    def test_get_defaults(self, settngs_manager):
+        settngs_manager.add_setting('--test', default='hello')
+        defaults, _ = settngs_manager.defaults()
+        assert defaults['']['test'] == 'hello'
+
+    def test_get_defaults_group(self, settngs_manager):
+        settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'))
+        defaults, _ = settngs_manager.defaults()
+        assert defaults['tst']['test'] == 'hello'
+
+    def test_get_defaults_group_space(self, settngs_manager):
+        settngs_manager.add_group('Testing tst', lambda parser: parser.add_setting('--test', default='hello'))
+        defaults, _ = settngs_manager.defaults()
+        assert defaults['Testing tst']['test'] == 'hello'
+
+    def test_cmdline_only(self, settngs_manager):
+        settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello', file=False))
+        settngs_manager.add_group('tst2', lambda parser: parser.add_setting('--test2', default='hello', cmdline=False))
+
+        file_normalized, _ = settngs_manager.normalize_config(settngs_manager.defaults(), file=True)
+        cmdline_normalized, _ = settngs_manager.normalize_config(settngs_manager.defaults(), cmdline=True)
+
+        assert 'test' not in file_normalized['tst']  # cmdline option not in normalized config
+        assert 'test2' in file_normalized['tst2']  # file option in normalized config
+
+        assert 'test' in cmdline_normalized['tst']  # cmdline option in normalized config
+        assert 'test2' not in cmdline_normalized['tst2']  # file option not in normalized config
+
+    def test_cmdline_only_persistent_group(self, settngs_manager):
+        settngs_manager.add_persistent_group('tst', lambda parser: parser.add_setting('--test', default='hello', file=False))
+        settngs_manager.add_group('tst2', lambda parser: parser.add_setting('--test2', default='hello', cmdline=False))
+
+        file_normalized, _ = settngs_manager.normalize_config(settngs_manager.defaults(), file=True)
+        cmdline_normalized, _ = settngs_manager.normalize_config(settngs_manager.defaults(), cmdline=True)
+
+        assert 'test' not in file_normalized['tst']
+        assert 'test2' in file_normalized['tst2']
+
+        assert 'test' in cmdline_normalized['tst']
+        assert 'test2' not in cmdline_normalized['tst2']
+
+    def test_normalize_defaults(self, settngs_manager):
+        settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'))
+        settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test2', default='hello'))
+        settngs_manager.add_persistent_group('tst_persistent', lambda parser: parser.add_setting('--test', default='hello'))
+
+        defaults = settngs_manager.defaults()
+        defaults_normalized = settngs_manager.normalize_config(defaults, file=True, default=False)
+        assert defaults_normalized.values['tst'] == {}
+        assert defaults_normalized.values['tst_persistent'] == {}
+
+        non_defaults = settngs_manager.defaults()
+        non_defaults.values['tst']['test'] = 'world'
+        non_defaults.values['tst_persistent']['test'] = 'world'
+        non_defaults_normalized = settngs_manager.normalize_config(non_defaults, file=True, default=False)
+
+        assert non_defaults_normalized.values['tst'] == {'test': 'world'}
+        assert non_defaults_normalized.values['tst_persistent'] == {'test': 'world'}
+
+    def test_normalize_dest(self, settngs_manager):
+        settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'))
+        settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test2', dest='test', default='hello'))
+        settngs_manager.add_persistent_group('tst_persistent', lambda parser: parser.add_setting('--test', default='hello'))
+
+        defaults = settngs_manager.defaults()
+        defaults_normalized = settngs_manager.normalize_config(defaults, file=True, default=False)
+        assert defaults_normalized.values['tst'] == {}
+        assert defaults_normalized.values['tst_persistent'] == {}
+
+        non_defaults = settngs_manager.defaults()
+        non_defaults.values['tst']['test'] = 'world'
+        non_defaults.values['tst_persistent']['test'] = 'world'
+        non_defaults_normalized = settngs_manager.normalize_config(non_defaults, file=True, default=False)
+
+        assert non_defaults_normalized.values['tst'] == {'test': 'world'}
+        assert non_defaults_normalized.values['tst_persistent'] == {'test': 'world'}
+
+    def test_normalize(self, settngs_manager):
+        settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'))
+        settngs_manager.add_persistent_group('persistent', lambda parser: parser.add_setting('--world', default='world'))
+
+        defaults = settngs_manager.defaults()
+        defaults.values['test'] = 'fail'  # Not defined in settngs_manager, should be removed
+        defaults.values['persistent']['hello'] = 'success'  # Not defined in settngs_manager, should stay
+
+        normalized, _ = settngs_manager.normalize_config(defaults, file=True)
+
+        assert 'test' not in normalized
+        assert 'tst' in normalized
+        assert 'test' in normalized['tst']
+        assert normalized['tst']['test'] == 'hello'
+        assert normalized['persistent']['hello'] == 'success'
+        assert normalized['persistent']['world'] == 'world'
+
+    def test_unknown_group(self):
+        manager = settngs.Manager()
+        manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'))
+        manager.add_persistent_group('persistent', lambda parser: parser.add_setting('--world', default='world'))
+
+        manager_unknown = settngs.Manager()
+        manager_unknown.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'))
+        # This manager doesn't know about this group
+        # manager_unknown.add_persistent_group('persistent', lambda parser: parser.add_setting('--world', default='world'))
+
+        defaults = manager.defaults()
+        defaults.values['test'] = 'fail'  # type: ignore[index] # Not defined in manager, should be removed
+        defaults.values['persistent']['hello'] = 'success'  # Group is not defined in manager_unknown, should stay
+
+        normalized, _ = manager_unknown.normalize_config(defaults.values, file=True)
+
+        assert 'test' not in normalized
+        assert 'tst' in normalized
+        assert 'test' in normalized['tst']
+        assert normalized['tst']['test'] == 'hello'
+        assert normalized['persistent']['hello'] == 'success'
+        assert normalized['persistent']['world'] == 'world'
+
+
+class TestNamespace:
+
+    def test_invalid_normalize(self, settngs_manager):
+        with pytest.raises(ValueError) as excinfo:
+            settngs_manager.add_setting('--test', default='hello')
+            defaults, _ = settngs_manager.get_namespace(settngs_manager.defaults(), file=False, cmdline=False)
+        assert str(excinfo.value) == 'Invalid parameters: you must set either file or cmdline to True'
+
+    def test_get_defaults(self, settngs_manager):
+        settngs_manager.add_setting('--test', default='hello')
+        defaults, _ = settngs_manager.get_namespace(settngs_manager.defaults(), file=True, cmdline=True)
+        assert defaults.test == 'hello'
+
+    def test_get_defaults_group(self, settngs_manager):
+        settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'))
+        defaults, _ = settngs_manager.get_namespace(settngs_manager.defaults(), file=True, cmdline=True)
+        assert defaults.tst__test == 'hello'
+
+    def test_get_defaults_group_space(self, settngs_manager):
+        settngs_manager.add_group('Testing tst', lambda parser: parser.add_setting('--test', default='hello'))
+        defaults, _ = settngs_manager.get_namespace(settngs_manager.defaults(), file=True, cmdline=True)
+        assert defaults.Testing_tst__test == 'hello'
+
+    def test_cmdline_only(self, settngs_manager):
+        settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello', file=False))
+        settngs_manager.add_group('tst2', lambda parser: parser.add_setting('--test2', default='hello', cmdline=False))
+
+        file_normalized, _ = settngs_manager.get_namespace(settngs_manager.normalize_config(settngs_manager.defaults(), file=True), file=True)
+        cmdline_normalized, _ = settngs_manager.get_namespace(settngs_manager.normalize_config(settngs_manager.defaults(), cmdline=True), cmdline=True)
+
+        assert 'tst__test' not in file_normalized.__dict__
+        assert 'tst2__test2' in file_normalized.__dict__
+
+        assert 'tst__test' in cmdline_normalized.__dict__
+        assert 'tst2__test2' not in cmdline_normalized.__dict__
+
+    def test_cmdline_only_persistent_group(self, settngs_manager):
+        settngs_manager.add_persistent_group('tst', lambda parser: parser.add_setting('--test', default='hello', file=False))
+        settngs_manager.add_group('tst2', lambda parser: parser.add_setting('--test2', default='hello', cmdline=False))
+
+        file_normalized, _ = settngs_manager.get_namespace(settngs_manager.normalize_config(settngs_manager.defaults(), file=True), file=True)
+        cmdline_normalized, _ = settngs_manager.get_namespace(settngs_manager.normalize_config(settngs_manager.defaults(), cmdline=True), cmdline=True)
+
+        assert 'tst__test' not in file_normalized.__dict__
+        assert 'tst2__test2' in file_normalized.__dict__
+
+        assert 'tst__test' in cmdline_normalized.__dict__
+        assert 'tst2__test2' not in cmdline_normalized.__dict__
+
+    def test_normalize_defaults(self, settngs_manager):
+        settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'))
+        settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test2', default='hello'))
+        settngs_manager.add_persistent_group('tst_persistent', lambda parser: parser.add_setting('--test', default='hello'))
+
+        defaults = settngs_manager.defaults()
+        defaults_normalized = settngs_manager.get_namespace(settngs_manager.normalize_config(defaults, file=True, default=False), file=True, default=False)
+        assert defaults_normalized.values.__dict__ == {}
+
+        non_defaults = settngs_manager.get_namespace(settngs_manager.defaults(), file=True, cmdline=True)
+        non_defaults.values.tst__test = 'world'
+        non_defaults.values.tst_persistent__test = 'world'
+        non_defaults_normalized = settngs_manager.get_namespace(settngs_manager.normalize_config(non_defaults, file=True, default=False), file=True, default=False)
+
+        assert non_defaults_normalized.values.tst__test == 'world'
+        assert non_defaults_normalized.values.tst_persistent__test == 'world'
+
+    def test_normalize_dest(self, settngs_manager):
+        settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'))
+        settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test2', dest='test', default='hello'))
+        settngs_manager.add_persistent_group('tst_persistent', lambda parser: parser.add_setting('--test', default='hello'))
+
+        defaults = settngs_manager.defaults()
+        defaults_normalized = settngs_manager.get_namespace(settngs_manager.normalize_config(defaults, file=True, default=False), file=True, default=False)
+        assert defaults_normalized.values.__dict__ == {}
+
+        non_defaults = settngs_manager.get_namespace(settngs_manager.defaults(), file=True, cmdline=True)
+        non_defaults.values.tst__test = 'world'
+        non_defaults.values.tst_persistent__test = 'world'
+        non_defaults_normalized = settngs_manager.get_namespace(settngs_manager.normalize_config(non_defaults, file=True, default=False), file=True, default=False)
+
+        assert non_defaults_normalized.values.tst__test == 'world'
+        assert non_defaults_normalized.values.tst_persistent__test == 'world'
+
+    def test_normalize(self, settngs_manager):
+        settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'))
+        settngs_manager.add_persistent_group('persistent', lambda parser: parser.add_setting('--world', default='world'))
+
+        defaults = settngs_manager.get_namespace(settngs_manager.defaults(), file=True, cmdline=True)
+        defaults.values.test = 'fail'  # Not defined in settngs_manager, should be removed
+        defaults.values.persistent__hello = 'success'  # Not defined in settngs_manager, should stay
+
+        normalized, _ = settngs_manager.get_namespace(settngs_manager.normalize_config(defaults, file=True), file=True)
+
+        assert not hasattr(normalized, 'test')
+        assert hasattr(normalized, 'tst__test')
+        assert normalized.tst__test == 'hello'
+        assert normalized.persistent__hello == 'success'
+        assert normalized.persistent__world == 'world'
+
+    def test_normalize_unknown_group(self, settngs_manager):
+        manager = settngs.Manager()
+        manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'))
+        manager.add_persistent_group('persistent', lambda parser: parser.add_setting('--world', default='world'))
+
+        manager_unknown = settngs.Manager()
+        manager_unknown.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'))
+        # This manager doesn't know about this group
+        # manager_unknown.add_persistent_group('persistent', lambda parser: parser.add_setting('--world', default='world'))
+
+        defaults = manager.get_namespace(manager.defaults(), file=True, cmdline=True)
+        defaults.values.test = 'fail'  # Not defined in manager, should be removed
+        defaults.values.persistent__hello = 'success'  # Not defined in manager, should stay
+
+        normalized, _ = manager_unknown.get_namespace(defaults.values, file=True)
+
+        assert not hasattr(normalized, 'test')
+        assert hasattr(normalized, 'tst__test')
+        assert normalized.tst__test == 'hello'
+        assert normalized.persistent__hello == 'success'
+        assert normalized.persistent__world == 'world'
 
 
 def test_get_namespace_with_namespace(settngs_manager):
     settngs_manager.add_setting('--test', default='hello')
-    defaults, _ = settngs_manager.get_namespace(argparse.Namespace(test='success'))
+    defaults, _ = settngs_manager.get_namespace(argparse.Namespace(test='success'), file=True)
     assert defaults.test == 'success'
 
 
-def test_get_defaults_group(settngs_manager):
-    settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'))
-    defaults, _ = settngs_manager.defaults()
-    assert defaults['tst']['test'] == 'hello'
-
-
 def test_get_namespace_group(settngs_manager):
     settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'))
-    defaults, _ = settngs_manager.get_namespace(settngs_manager.defaults())
+    defaults, _ = settngs_manager.get_namespace(settngs_manager.defaults(), file=True)
-    assert defaults.tst_test == 'hello'
+    assert defaults.tst__test == 'hello'
-
-
-def test_cmdline_only(settngs_manager):
-    settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello', file=False))
-    settngs_manager.add_group('tst2', lambda parser: parser.add_setting('--test2', default='hello', cmdline=False))
-
-    file_normalized, _ = settngs_manager.normalize_config(settngs_manager.defaults(), file=True)
-    cmdline_normalized, _ = settngs_manager.normalize_config(settngs_manager.defaults(), cmdline=True)
-
-    assert 'test' in cmdline_normalized['tst']
-    assert 'test2' not in cmdline_normalized['tst2']
-
-    assert 'test' not in file_normalized['tst']
-    assert 'test2' in file_normalized['tst2']
-
-
-def test_cmdline_only_persistent_group(settngs_manager):
-    settngs_manager.add_persistent_group('tst', lambda parser: parser.add_setting('--test', default='hello', file=False))
-    settngs_manager.add_group('tst2', lambda parser: parser.add_setting('--test2', default='hello', cmdline=False))
-
-    file_normalized, _ = settngs_manager.normalize_config(settngs_manager.defaults(), file=True)
-    cmdline_normalized, _ = settngs_manager.normalize_config(settngs_manager.defaults(), cmdline=True)
-
-    assert 'test' in cmdline_normalized['tst']
-    assert 'test2' not in cmdline_normalized['tst2']
-
-    assert 'test' not in file_normalized['tst']
-    assert 'test2' in file_normalized['tst2']
-
-
-def test_normalize(settngs_manager):
-    settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test', default='hello'))
-    settngs_manager.add_persistent_group('persistent', lambda parser: parser.add_setting('--world', default='world'))
-
-    defaults = settngs_manager.defaults()
-    defaults.values['test'] = 'fail'  # Not defined in settngs_manager, should be removed
-    defaults.values['persistent']['hello'] = 'success'  # Not defined in settngs_manager, should stay
-
-    defaults_namespace = settngs_manager.get_namespace(settngs_manager.defaults())
-    defaults_namespace.values.test = 'fail'  # Not defined in settngs_manager, should be removed
-    defaults_namespace.values.persistent_hello = 'success'  # Not defined in settngs_manager, should stay
-
-    normalized, _ = settngs_manager.normalize_config(defaults, file=True)
-    normalized_from_namespace = settngs_manager.normalize_config(defaults_namespace, file=True)
-    normalized_namespace, _ = settngs_manager.get_namespace(normalized_from_namespace)
-
-    assert 'test' not in normalized
-    assert 'tst' in normalized
-    assert 'test' in normalized['tst']
-    assert normalized['tst']['test'] == 'hello'
-    assert normalized['persistent']['hello'] == 'success'
-    assert normalized['persistent']['world'] == 'world'
-
-    assert not hasattr(normalized_namespace, 'test')
-    assert hasattr(normalized_namespace, 'tst_test')
-    assert normalized_namespace.tst_test == 'hello'
-    assert normalized_namespace.persistent_hello == 'success'
-    assert normalized_namespace.persistent_world == 'world'
 
 
 def test_clean_config(settngs_manager):
@@ -169,8 +433,8 @@ def test_parse_cmdline(settngs_manager):
 
 namespaces = (
     lambda definitions: settngs.Config({'tst': {'test': 'fail', 'test2': 'success'}}, definitions),
-    lambda definitions: settngs.Config(argparse.Namespace(tst_test='fail', tst_test2='success'), definitions),
+    lambda definitions: settngs.Config(argparse.Namespace(tst__test='fail', tst__test2='success'), definitions),
-    lambda definitions: argparse.Namespace(tst_test='fail', tst_test2='success'),
+    lambda definitions: argparse.Namespace(tst__test='fail', tst__test2='success'),
 )
 
 
@@ -180,7 +444,7 @@ def test_parse_cmdline_with_namespace(settngs_manager, ns):
     settngs_manager.add_group('tst', lambda parser: parser.add_setting('--test2', default='fail', cmdline=True))
 
     normalized, _ = settngs_manager.parse_cmdline(
-        ['--test', 'success'], namespace=ns(settngs_manager.definitions),
+        ['--test', 'success'], config=ns(settngs_manager.definitions),
     )
 
     assert 'test' in normalized['tst']
@@ -331,7 +595,7 @@ def test_adding_to_existing_group(settngs_manager, tmp_path):
     assert default_to_regular(settngs_manager.definitions) == default_to_regular(settngs_manager2.definitions)
 
 
-def test_adding_to_existing_persistent_group(settngs_manager, tmp_path):
+def test_adding_to_existing_persistent_group(settngs_manager: settngs.Manager, tmp_path: pathlib.Path) -> None:
     def default_to_regular(d):
         if isinstance(d, defaultdict):
             d = {k: default_to_regular(v) for k, v in d.items()}
@@ -349,6 +613,233 @@ def test_adding_to_existing_persistent_group(settngs_manager, tmp_path):
     assert default_to_regular(settngs_manager.definitions) == default_to_regular(settngs_manager2.definitions)
 
 
+class test_type(int):
+    ...
+
+
+def _typed_function(something: str) -> test_type:  # pragma: no cover
+    return test_type()
+
+
+def _typed_list_generic_function(something: test_type) -> List[test_type]:  # pragma: no cover
+    return [test_type()]
+
+
+def _typed_list_function() -> List:   # type: ignore[type-arg] # pragma: no cover
+    return []
+
+
+def _typed_set_function() -> Set:  # type: ignore[type-arg] # pragma: no cover
+    return set()
+
+
+def _untyped_function(something):
+    ...
+
+
+class _customAction(argparse.Action):  # pragma: no cover
+
+    def __init__(
+        self,
+        option_strings,
+        dest,
+        const=None,
+        default=None,
+        required=False,
+        help=None,  # noqa: A002
+        metavar=None,
+    ):
+        super().__init__(
+            option_strings=option_strings,
+            dest=dest,
+            nargs=0,
+            const=const,
+            default=default,
+            required=required,
+            help=help,
+        )
+
+    def __call__(self, parser, namespace, values, option_string=None):  # pragma: no cover
+        setattr(namespace, self.dest, 'Something')
+
+
+types = (
+    (0, settngs.Setting('-t', '--test'), str, True),
+    (1, settngs.Setting('-t', '--test', cmdline=False), 'Any', True),
+    (2, settngs.Setting('-t', '--test', default=1, file=True, cmdline=False), int, False),
+    (3, settngs.Setting('-t', '--test', default='test'), str, False),
+    (4, settngs.Setting('-t', '--test', default='test', file=True, cmdline=False), str, False),
+    (5, settngs.Setting('-t', '--test', action='count'), int, True),
+    (6, settngs.Setting('-t', '--test', action='append'), List[str], True),
+    (7, settngs.Setting('-t', '--test', action='extend'), List[str], True),
+    (8, settngs.Setting('-t', '--test', nargs='+'), List[str], True),
+    (9, settngs.Setting('-t', '--test', action='store_const', const=1), int, True),
+    (10, settngs.Setting('-t', '--test', action='append_const', const=1), List[int], True),
+    (11, settngs.Setting('-t', '--test', action='store_true'), bool, False),
+    (12, settngs.Setting('-t', '--test', action='store_false'), bool, False),
+    (13, settngs.Setting('-t', '--test', action=settngs.BooleanOptionalAction), bool, True),
+    (14, settngs.Setting('-t', '--test', action=_customAction), 'Any', True),
+    (15, settngs.Setting('-t', '--test', action='help'), None, True),
+    (16, settngs.Setting('-t', '--test', action='version'), None, True),
+    (17, settngs.Setting('-t', '--test', type=int), int, True),
+    (18, settngs.Setting('-t', '--test', type=int, nargs='+'), List[int], True),
+    (19, settngs.Setting('-t', '--test', type=_typed_function), test_type, True),
+    (20, settngs.Setting('-t', '--test', type=_untyped_function, default=1), int, False),
+    (21, settngs.Setting('-t', '--test', type=_untyped_function, default=[1]), List[int], False),
+    (22, settngs.Setting('-t', '--test', type=_untyped_function), 'Any', True),
+    (23, settngs.Setting('-t', '--test', type=_untyped_function, default={1}), Set[int], False),
+    (24, settngs.Setting('-t', '--test', action='append', type=int), List[int], True),
+    (25, settngs.Setting('-t', '--test', action='extend', type=int, nargs=2), List[int], True),
+    (26, settngs.Setting('-t', '--test', action='append', type=int, nargs=2), List[List[int]], True),
+    (27, settngs.Setting('-t', '--test', action='extend', nargs='+'), List[str], True),
+    (28, settngs.Setting('-t', '--test', action='extend', type=_typed_list_generic_function), List[test_type], True),
+    (29, settngs.Setting('-t', '--test', action='extend', type=_typed_list_function), List, True),
+    (30, settngs.Setting('-t', '--test', action='extend', type=_typed_set_function), Set, True),
+)
+
+
+@pytest.mark.parametrize('num,setting,typ,noneable_expected', types)
+def test_guess_type(num, setting, typ, noneable_expected):
+    x = setting._guess_type()
+    guessed_type, noneable = x
+    assert guessed_type == typ
+    assert noneable == noneable_expected
+
+
+expected_src = '''from __future__ import annotations
+
+import settngs
+{extra_imports}
+
+class SettngsNS(settngs.TypedNS):
+    test__test: {typ}
+'''
+no_type_expected_src = '''from __future__ import annotations
+
+import settngs
+
+
+class SettngsNS(settngs.TypedNS):
+    ...
+'''
+settings = (
+    (0, lambda parser: parser.add_setting('-t', '--test'), expected_src.format(extra_imports='', typ='str | None')),
+    (1, lambda parser: parser.add_setting('-t', '--test', cmdline=False), expected_src.format(extra_imports='import typing\n', typ='typing.Any')),
+    (2, lambda parser: parser.add_setting('-t', '--test', default=1, file=True, cmdline=False), expected_src.format(extra_imports='', typ='int')),
+    (3, lambda parser: parser.add_setting('-t', '--test', default='test'), expected_src.format(extra_imports='', typ='str')),
+    (4, lambda parser: parser.add_setting('-t', '--test', default='test', file=True, cmdline=False), expected_src.format(extra_imports='', typ='str')),
+    (5, lambda parser: parser.add_setting('-t', '--test', action='count'), expected_src.format(extra_imports='', typ='int | None')),
+    (6, lambda parser: parser.add_setting('-t', '--test', action='append'), expected_src.format(extra_imports='import typing\n' if sys.version_info < (3, 9) else '', typ=f'{List[str]} | None')),
+    (7, lambda parser: parser.add_setting('-t', '--test', action='extend'), expected_src.format(extra_imports='import typing\n' if sys.version_info < (3, 9) else '', typ=f'{List[str]} | None')),
+    (8, lambda parser: parser.add_setting('-t', '--test', nargs='+'), expected_src.format(extra_imports='import typing\n' if sys.version_info < (3, 9) else '', typ=f'{List[str]} | None')),
+    (9, lambda parser: parser.add_setting('-t', '--test', action='store_const', const=1), expected_src.format(extra_imports='', typ='int | None')),
+    (10, lambda parser: parser.add_setting('-t', '--test', action='append_const', const=1), expected_src.format(extra_imports='import typing\n' if sys.version_info < (3, 9) else '', typ=f'{List[int]} | None')),
+    (11, lambda parser: parser.add_setting('-t', '--test', action='store_true'), expected_src.format(extra_imports='', typ='bool')),
+    (12, lambda parser: parser.add_setting('-t', '--test', action='store_false'), expected_src.format(extra_imports='', typ='bool')),
+    (13, lambda parser: parser.add_setting('-t', '--test', action=settngs.BooleanOptionalAction), expected_src.format(extra_imports='', typ='bool | None')),
+    (14, lambda parser: parser.add_setting('-t', '--test', action=_customAction), expected_src.format(extra_imports='import typing\n', typ='typing.Any')),
+    (15, lambda parser: parser.add_setting('-t', '--test', action='help'), no_type_expected_src),
+    (16, lambda parser: parser.add_setting('-t', '--test', action='version'), no_type_expected_src),
+    (17, lambda parser: parser.add_setting('-t', '--test', type=int), expected_src.format(extra_imports='', typ='int | None')),
+    (18, lambda parser: parser.add_setting('-t', '--test', type=int, nargs='+'), expected_src.format(extra_imports='import typing\n' if sys.version_info < (3, 9) else '', typ=f'{List[int]} | None')),
+    (19, lambda parser: parser.add_setting('-t', '--test', type=_typed_function), expected_src.format(extra_imports='import tests.settngs_test\n', typ='tests.settngs_test.test_type | None')),
+    (20, lambda parser: parser.add_setting('-t', '--test', type=_untyped_function, default=1), expected_src.format(extra_imports='', typ='int')),
+    (21, lambda parser: parser.add_setting('-t', '--test', type=_untyped_function, default=[1]), expected_src.format(extra_imports='import typing\n' if sys.version_info < (3, 9) else '', typ=f'{List[int]}')),
+    (22, lambda parser: parser.add_setting('-t', '--test', type=_untyped_function), expected_src.format(extra_imports='import typing\n', typ='typing.Any')),
+    (23, lambda parser: parser.add_setting('-t', '--test', type=_untyped_function, default={1}), expected_src.format(extra_imports='import typing\n' if sys.version_info < (3, 9) else '', typ=f'{Set[int]}')),
+    (24, lambda parser: parser.add_setting('-t', '--test', action='append', type=int), expected_src.format(extra_imports='import typing\n' if sys.version_info < (3, 9) else '', typ=f'{List[int]} | None')),
+    (25, lambda parser: parser.add_setting('-t', '--test', action='extend', type=int, nargs=2), expected_src.format(extra_imports='import typing\n' if sys.version_info < (3, 9) else '', typ=f'{List[int]} | None')),
+    (26, lambda parser: parser.add_setting('-t', '--test', action='append', type=int, nargs=2), expected_src.format(extra_imports='import typing\n' if sys.version_info < (3, 9) else '', typ=f'{List[List[int]]} | None')),
+    (27, lambda parser: parser.add_setting('-t', '--test', action='extend', nargs='+'), expected_src.format(extra_imports='import typing\n' if sys.version_info < (3, 9) else '', typ=f'{List[str]} | None')),
+    (28, lambda parser: parser.add_setting('-t', '--test', action='extend', type=_typed_list_generic_function), expected_src.format(extra_imports='import typing\n' if sys.version_info < (3, 9) else '', typ=f'{List[test_type]} | None')),
+    (29, lambda parser: parser.add_setting('-t', '--test', action='extend', type=_typed_list_function), expected_src.format(extra_imports='', typ=f'{settngs._type_to_string(List)[0]} | None')),
+    (30, lambda parser: parser.add_setting('-t', '--test', action='extend', type=_typed_set_function), expected_src.format(extra_imports='', typ=f'{settngs._type_to_string(Set)[0]} | None')),
+)
+
+
+@pytest.mark.parametrize('num,set_options,expected', settings)
+def test_generate_ns(settngs_manager, num, set_options, expected):
+    settngs_manager.add_group('test', set_options)
+
+    imports, types = settngs_manager.generate_ns()
+    generated_src = '\n\n\n'.join((imports, types))
+
+    assert generated_src == expected
+
+    ast.parse(generated_src)
+
+
+expected_src_dict = '''from __future__ import annotations
+
+import typing
+{extra_imports}
+
+class test(typing.TypedDict):
+    test: {typ}
+
+
+class SettngsDict(typing.TypedDict):
+    test: test
+'''
+no_type_expected_src_dict = '''from __future__ import annotations
+
+import typing
+
+
+class test(typing.TypedDict):
+    ...
+
+
+class SettngsDict(typing.TypedDict):
+    test: test
+'''
+settings_dict = (
+    (0, lambda parser: parser.add_setting('-t', '--test'), expected_src_dict.format(extra_imports='', typ='str | None')),
+    (1, lambda parser: parser.add_setting('-t', '--test', cmdline=False), expected_src_dict.format(extra_imports='', typ='typing.Any')),
+    (2, lambda parser: parser.add_setting('-t', '--test', default=1, file=True, cmdline=False), expected_src_dict.format(extra_imports='', typ='int')),
+    (3, lambda parser: parser.add_setting('-t', '--test', default='test'), expected_src_dict.format(extra_imports='', typ='str')),
+    (4, lambda parser: parser.add_setting('-t', '--test', default='test', file=True, cmdline=False), expected_src_dict.format(extra_imports='', typ='str')),
+    (5, lambda parser: parser.add_setting('-t', '--test', action='count'), expected_src_dict.format(extra_imports='', typ='int | None')),
+    (6, lambda parser: parser.add_setting('-t', '--test', action='append'), expected_src_dict.format(extra_imports='', typ=f'{List[str]} | None')),
+    (7, lambda parser: parser.add_setting('-t', '--test', action='extend'), expected_src_dict.format(extra_imports='', typ=f'{List[str]} | None')),
+    (8, lambda parser: parser.add_setting('-t', '--test', nargs='+'), expected_src_dict.format(extra_imports='', typ=f'{List[str]} | None')),
+    (9, lambda parser: parser.add_setting('-t', '--test', action='store_const', const=1), expected_src_dict.format(extra_imports='', typ='int | None')),
+    (10, lambda parser: parser.add_setting('-t', '--test', action='append_const', const=1), expected_src_dict.format(extra_imports='', typ=f'{List[int]} | None')),
+    (11, lambda parser: parser.add_setting('-t', '--test', action='store_true'), expected_src_dict.format(extra_imports='', typ='bool')),
+    (12, lambda parser: parser.add_setting('-t', '--test', action='store_false'), expected_src_dict.format(extra_imports='', typ='bool')),
+    (13, lambda parser: parser.add_setting('-t', '--test', action=settngs.BooleanOptionalAction), expected_src_dict.format(extra_imports='', typ='bool | None')),
+    (14, lambda parser: parser.add_setting('-t', '--test', action=_customAction), expected_src_dict.format(extra_imports='', typ='typing.Any')),
+    (15, lambda parser: parser.add_setting('-t', '--test', action='help'), no_type_expected_src_dict),
+    (16, lambda parser: parser.add_setting('-t', '--test', action='version'), no_type_expected_src_dict),
+    (17, lambda parser: parser.add_setting('-t', '--test', type=int), expected_src_dict.format(extra_imports='', typ='int | None')),
+    (18, lambda parser: parser.add_setting('-t', '--test', type=int, nargs='+'), expected_src_dict.format(extra_imports='', typ=f'{List[int]} | None')),
+    (19, lambda parser: parser.add_setting('-t', '--test', type=_typed_function), expected_src_dict.format(extra_imports='import tests.settngs_test\n', typ=f'{test_type.__module__}.{test_type.__name__} | None')),
+    (20, lambda parser: parser.add_setting('-t', '--test', type=_untyped_function, default=1), expected_src_dict.format(extra_imports='', typ='int')),
+    (21, lambda parser: parser.add_setting('-t', '--test', type=_untyped_function, default=[1]), expected_src_dict.format(extra_imports='', typ=f'{List[int]}')),
+    (22, lambda parser: parser.add_setting('-t', '--test', type=_untyped_function), expected_src_dict.format(extra_imports='', typ='typing.Any')),
+    (23, lambda parser: parser.add_setting('-t', '--test', type=_untyped_function, default={1}), expected_src_dict.format(extra_imports='', typ=f'{Set[int]}')),
+    (24, lambda parser: parser.add_setting('-t', '--test', action='append', type=int), expected_src_dict.format(extra_imports='', typ=f'{List[int]} | None')),
+    (25, lambda parser: parser.add_setting('-t', '--test', action='extend', type=int, nargs=2), expected_src_dict.format(extra_imports='', typ=f'{List[int]} | None')),
+    (26, lambda parser: parser.add_setting('-t', '--test', action='append', type=int, nargs=2), expected_src_dict.format(extra_imports='', typ=f'{List[List[int]]} | None')),
+    (27, lambda parser: parser.add_setting('-t', '--test', action='extend', nargs='+'), expected_src_dict.format(extra_imports='', typ=f'{List[str]} | None')),
+    (28, lambda parser: parser.add_setting('-t', '--test', action='extend', type=_typed_list_generic_function), expected_src_dict.format(extra_imports='', typ=f'{List[test_type]} | None')),
+    (29, lambda parser: parser.add_setting('-t', '--test', action='extend', type=_typed_list_function), expected_src_dict.format(extra_imports='', typ=f'{settngs._type_to_string(List)[0]} | None')),
+    (30, lambda parser: parser.add_setting('-t', '--test', action='extend', type=_typed_set_function), expected_src_dict.format(extra_imports='', typ=f'{settngs._type_to_string(Set)[0]} | None')),
+)
+
+
+@pytest.mark.parametrize('num,set_options,expected', settings_dict)
+def test_generate_dict(settngs_manager, num, set_options, expected):
+    settngs_manager.add_group('test', set_options)
+
+    imports, types = settngs_manager.generate_dict()
+    generated_src = '\n\n\n'.join((imports, types))
+
+    assert generated_src == expected
+
+    ast.parse(generated_src)
+
+
 def test_example(capsys, tmp_path, monkeypatch):
     monkeypatch.chdir(tmp_path)
     settings_file = tmp_path / 'settings.json'
@@ -358,7 +849,9 @@ def test_example(capsys, tmp_path, monkeypatch):
     for args, expected_out, expected_file in example:
         if args == ['manual settings.json']:
             settings_file.unlink()
-            settings_file.write_text('{\n  "example": {\n    "hello": "lordwelch",\n    "verbose": true\n  },\n  "persistent": {\n    "test": false,\n    "hello": "world"\n  }\n}\n')
+            settings_file.write_text('{\n  "Example Group": {\n    "hello": "lordwelch",\n    "verbose": true\n  },\n  "persistent": {\n    "test": false,\n    "hello": "world"\n  }\n}\n')
+            i += 1
+            continue
         else:
             settngs._main(args)
             captured = capsys.readouterr()