Bring in scripts/pip_rev_deps.py

* This finds the pip-installed modules that depend on the specified module.
  Handy for cleaning things up.
* Leads to needing types-pkg-resources for mypy (and via pre-commit).

.pre-commit-config.yaml

@@ -51,7 +51,7 @@ repos:
       - id: mypy
         # verbose: true
         # log_file: 'pre-commit_mypy.log'
-        additional_dependencies: [ types-requests, types-urllib3 ]
+        additional_dependencies: [ types-pkg-resources, types-requests, types-urllib3 ]
         # args: [ "--follow-imports", "skip", "--ignore-missing-imports", "--scripts-are-modules" ]
 
 ### # pydocstyle.exe <file>

requirements-dev.txt

@@ -24,6 +24,7 @@ mypy==0.991
 pep8-naming==0.13.3
 safety==2.3.5
 types-requests==2.28.11.7
+types-pkg-resources==0.1.3
 
 # Code formatting tools
 autopep8==2.0.1

scripts/pip_rev_deps.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+"""Find the reverse dependencies of a package according to pip."""
+import sys
+
+import pkg_resources
+
+
+def find_reverse_deps(package_name: str):
+    """
+    Find the packages that depend on the named one.
+
+    :param package_name: Target package.
+    :return: List of packages that depend on this one.
+    """
+    return [
+        pkg.project_name for pkg in pkg_resources.WorkingSet()
+        if package_name in {req.project_name for req in pkg.requires()}
+    ]
+
+
+if __name__ == '__main__':
+    print(find_reverse_deps(sys.argv[1]))