fix: Apply PEP 503 package name normalization before verifying packages

    This resolves issues where packages, like ruamel.yaml, may
    appear under different names across the set of expected and
    installed package sets (e.g. `ruamel-yaml` and `ruamel.yaml`) despite
    both names referring to the same package per PEP 503.

Author: kdestin

eng/tox/verify_installed_packages.py

@@ -9,6 +9,7 @@
 import os
 import sys
 import logging
+import re
 from os import path
 
 # import common_task module
@@ -17,6 +18,19 @@
 sys.path.append(common_task_path)
 from common_tasks import get_installed_packages
 
+
+def normalize_package_name(package_name: str) -> str:
+    """Apply PEP 503 normalization rules to package names
+
+    .. see-also::
+
+        https://peps.python.org/pep-0503/#normalized-names
+        https://packaging.python.org/en/latest/specifications/name-normalization/#name-normalization
+    """
+
+    return re.sub(r"[-_.]+", "-", package_name).lower()
+
+
 def verify_packages(package_file_path):
     # this method verifies packages installed on machine is matching the expected package version
     # packages.txt file expects to have list of packages and version in format <package-name>==<version>
@@ -38,11 +52,11 @@ def verify_packages(package_file_path):
     for p in get_installed_packages():
         if "==" in p:
             [package, version] = p.split("==")
-            installed[package.upper().replace("_","-")] = version
+            installed[normalize_package_name(package)] = version
     expected = {}
     for p in packages:
         [package, version] = p.split("==")
-        expected[package.upper().replace("_","-")] = version
+        expected[normalize_package_name(package)] = version
 
     missing_packages = [pkg for pkg in expected.keys() if installed.get(pkg) != expected.get(pkg)]