Updated Python dependencies (hitachienergy#2756)

- Updated Python dependencies.
- Minor document addition.
- Added pytest_mock development dependency.
- Updated documentation for Python package management

.devcontainer/Dockerfile

@@ -49,7 +49,7 @@ RUN : INSTALL PIP REQUIREMENTS \
  && pip install --disable-pip-version-check --no-cache-dir --default-timeout=100 \
     --requirement /requirements.txt \
  && pip install --disable-pip-version-check --no-cache-dir --default-timeout=100 \
-    poetry pylint pylint_junit ansible-lint ansible-lint-to-junit-xml yamllint pytest setuptools twine wheel
+    poetry pylint pylint_junit ansible-lint ansible-lint-to-junit-xml yamllint pytest pytest_mock setuptools twine wheel
 
 RUN : SETUP USER AND OTHERS \
  && groupadd --gid $USER_GID $USERNAME \

.devcontainer/gen-dependency-info.py

@@ -29,7 +29,14 @@ def get_pkg_data(pkgname: str, pat:str) -> str:
         logging.warning('Failed to get license information for package: ' + pkgname)
         return None
     pkg = pkgs[0]
-    pkg_data = {}
+    pkg_data = {
+        'Name': '',
+        'Version': '',
+        'Summary': '',
+        'Home-page': '',
+        'Author': '',
+        'License': ''
+    }
     for line in pkg.get_metadata_lines('METADATA'):
         try:
             (key, value) = line.split(': ', 1)
@@ -49,7 +56,7 @@ def get_pkg_data(pkgname: str, pat:str) -> str:
             pkg_data['License'] = value
 
     home = pkg_data['Home-page'].lower().rstrip('/')
-    
+
     if 'github' in home:
         try:
             split = home.split('/')