Make typing_extensions only required for type checking

Author: DenverCoder1

babel/core.py

@@ -13,34 +13,37 @@
 import os
 import pickle
 from collections.abc import Iterable, Mapping
-from typing import Any, overload
-
-from typing_extensions import Literal, TypeAlias
+from typing import TYPE_CHECKING, Any, overload
 
 from babel import localedata
 from babel.plural import PluralRule
 
 __all__ = ['UnknownLocaleError', 'Locale', 'default_locale', 'negotiate_locale',
            'parse_locale']
 
-_GLOBAL_KEY: TypeAlias = Literal[
-    "all_currencies",
-    "currency_fractions",
-    "language_aliases",
-    "likely_subtags",
-    "parent_exceptions",
-    "script_aliases",
-    "territory_aliases",
-    "territory_currencies",
-    "territory_languages",
-    "territory_zones",
-    "variant_aliases",
-    "windows_zone_mapping",
-    "zone_aliases",
-    "zone_territories",
-]
-
-_global_data: Mapping[_GLOBAL_KEY, Mapping[str, Any]] | None = None
+if TYPE_CHECKING:
+    from typing_extensions import Literal, TypeAlias
+
+    _GLOBAL_KEY: TypeAlias = Literal[
+        "all_currencies",
+        "currency_fractions",
+        "language_aliases",
+        "likely_subtags",
+        "parent_exceptions",
+        "script_aliases",
+        "territory_aliases",
+        "territory_currencies",
+        "territory_languages",
+        "territory_zones",
+        "variant_aliases",
+        "windows_zone_mapping",
+        "zone_aliases",
+        "zone_territories",
+    ]
+
+    _global_data: Mapping[_GLOBAL_KEY, Mapping[str, Any]] | None
+    
+_global_data = None
 _default_plural_rule = PluralRule({})
 
 def _raise_no_data_error():

babel/dates.py

@@ -25,13 +25,14 @@
 from typing import TYPE_CHECKING, SupportsInt
 
 import pytz as _pytz
-from typing_extensions import Literal, TypeAlias
 
 from babel.core import Locale, default_locale, get_global
 from babel.localedata import LocaleDataDict
 from babel.util import LOCALTZ, UTC
 
 if TYPE_CHECKING:
+    from typing_extensions import Literal, TypeAlias
+
     _Instant: TypeAlias = date | time | float | None
     _PredefinedTimeFormat: TypeAlias = Literal["full", "long", "medium", "short"]
     _Context: TypeAlias = Literal["format", "stand-alone"]
@@ -1123,7 +1124,7 @@ def format_interval(start: _Instant, end: _Instant, skeleton: str | None = None,
     return _format_fallback_interval(start, end, skeleton, tzinfo, locale)
 
 
-def get_period_id(time: _Instant, tzinfo: BaseTzInfo | None = None, type: Literal["selection"] | None = None,
+def get_period_id(time: _Instant, tzinfo: _pytz.BaseTzInfo | None = None, type: Literal["selection"] | None = None,
                   locale: Locale | str | None = LC_TIME) -> str:
     """
     Get the day period ID for a given time.

babel/lists.py

@@ -16,11 +16,13 @@
 from __future__ import annotations
 
 from collections.abc import Sequence
-
-from typing_extensions import Literal
+from typing import TYPE_CHECKING
 
 from babel.core import Locale, default_locale
 
+if TYPE_CHECKING:
+    from typing_extensions import Literal
+
 DEFAULT_LOCALE = default_locale()
 
 

babel/numbers.py

@@ -21,14 +21,16 @@
 
 import decimal
 import re
+from typing import TYPE_CHECKING
 import warnings
 from datetime import date as date_, datetime as datetime_
 
-from typing_extensions import Literal
-
 from babel.core import Locale, default_locale, get_global
 from babel.localedata import LocaleDataDict
 
+if TYPE_CHECKING:
+    from typing_extensions import Literal
+
 LC_NUMERIC = default_locale('LC_NUMERIC')
 
 

babel/units.py

@@ -1,13 +1,13 @@
 from __future__ import annotations
 
 import decimal
-
-from typing_extensions import Literal
+from typing import TYPE_CHECKING
 
 from babel.core import Locale
-from babel.localedata import LocaleDataDict
 from babel.numbers import LC_NUMERIC, format_decimal
 
+if TYPE_CHECKING:
+    from typing_extensions import Literal
 
 class UnknownUnitError(ValueError):
     def __init__(self, unit: str, locale: Locale):

setup.py

@@ -64,7 +64,6 @@ def run(self):
         # pytz otherwise does not install on pip 1.4 or
         # higher.
         'pytz>=2015.7',
-        'typing_extensions>=4.4.0,<5',
     ],
     cmdclass={'import_cldr': import_cldr},
     zip_safe=False,

tox.ini

@@ -8,7 +8,6 @@ deps =
     pytest>=6.0
     pytest-cov
     freezegun==0.3.12
-    typing_extensions>=4.4.0
     backports.zoneinfo;python_version<"3.9"
     tzdata;sys_platform == 'win32'
 whitelist_externals = make