fix: update dependency installation commands in lint workflow and improve proxy environment variable handling

Author: tpi-aigc

.github/workflows/lint.yml

@@ -16,7 +16,7 @@ jobs:
         with:
           python-version: "3.9"
       - name: Install dependencies
-        run: pip install --upgrade pip black
+        run: pip install --no-cache-dir black==24.10.0
       - name: Run black
         run: black --check --diff --verbose .
   isort:
@@ -28,7 +28,7 @@ jobs:
         with:
           python-version: "3.9"
       - name: Install dependencies
-        run: pip install --upgrade pip isort[colors]
+        run: pip install --no-cache-dir "isort[colors]==6.1.0"
       - name: Run isort
         run: isort --check-only --diff --verbose .
   flake8:
@@ -40,7 +40,7 @@ jobs:
         with:
           python-version: "3.9"
       - name: Install dependencies
-        run: pip install --upgrade pip flake8
+        run: pip install --no-cache-dir flake8==7.3.0
       - name: Run flake8
         run: flake8 --verbose .
   mypy:
@@ -52,6 +52,6 @@ jobs:
         with:
           python-version: "3.9"
       - name: Install dependencies
-        run: pip install --upgrade pip mypy pydantic
+        run: pip install --no-cache-dir mypy==1.15.0 pydantic
       - name: Run mypy
         run: mypy --install-types --non-interactive ./src

src/pytmv1/core.py

@@ -76,7 +76,8 @@ def __init__(
             "User-Agent": f"{self._appname}-{USERAGENT_SUFFIX}/{__version__}",
         }
         self._proxies: Optional[Dict[str, str]] = _proxy(
-            os.getenv("HTTP_PROXY"), os.getenv("HTTPS_PROXY")
+            os.getenv("HTTP_PROXY") or os.getenv("http_proxy"),
+            os.getenv("HTTPS_PROXY") or os.getenv("https_proxy"),
         )
 
     @result

tests/unit/test_core.py

@@ -26,7 +26,9 @@
     __version__,
 )
 from pytmv1 import core as core_m
-from pytmv1 import result
+from pytmv1 import (
+    result,
+)
 from pytmv1.core import API_VERSION, USERAGENT_SUFFIX, Core
 from pytmv1.exception import (
     ParseModelError,