feat: Use importlib.resources to load package files (#633)

* feat: Use importlib.resources to load package files

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: edgarrmondragon

pendulum/locales/locale.py

@@ -1,5 +1,5 @@
-import os
 import re
+import sys
 
 from importlib import import_module
 from typing import Any
@@ -8,6 +8,12 @@
 from typing import Union
 
 
+if sys.version_info >= (3, 9):
+    from importlib import resources
+else:
+    import importlib_resources as resources
+
+
 class Locale:
     """
     Represent a specific locale.
@@ -31,8 +37,8 @@ def load(cls, locale: Union[str, "Locale"]) -> "Locale":
 
         # Checking locale existence
         actual_locale = locale
-        locale_path = os.path.join(os.path.dirname(__file__), actual_locale)
-        while not os.path.exists(locale_path):
+        locale_path = resources.files(__package__).joinpath(actual_locale)
+        while not locale_path.exists():
             if actual_locale == locale:
                 raise ValueError(f"Locale [{locale}] does not exist.")
 

pendulum/tz/__init__.py

@@ -1,4 +1,4 @@
-import os
+import sys
 
 from typing import Union
 
@@ -12,6 +12,12 @@
 from .timezone import Timezone
 
 
+if sys.version_info >= (3, 9):
+    from importlib import resources
+else:
+    import importlib_resources as resources
+
+
 PRE_TRANSITION = "pre"
 POST_TRANSITION = "post"
 TRANSITION_ERROR = "error"
@@ -26,7 +32,7 @@ def timezones():
     global _timezones
 
     if _timezones is None:
-        with open(os.path.join(os.path.dirname(tzdata.__file__), "zones")) as f:
+        with open(resources.files(tzdata).joinpath("zones")) as f:
             _timezones = tuple(tz.strip() for tz in f.readlines())
 
     return _timezones

poetry.lock

@@ -29,6 +29,7 @@ python = "^3.7"
 python-dateutil = "^2.6"
 "backports.zoneinfo" = {version = "^0.2.1", python = ">=3.7,<3.9"}
 tzdata = ">=2020.1"
+importlib-resources = {version = "^5.9.0", python = ">=3.7,<3.9"}
 
 [tool.poetry.group.test.dependencies]
 pytest = "^6.2.5"