diff --git a/other-test-repos/filter-repo.py b/other-test-repos/filter-repo.py
new file mode 100755
index 00000000..0ff2a0e
--- /dev/null
+++ b/other-test-repos/filter-repo.py
@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+
+# https://stackoverflow.com/questions/64160917/how-to-use-git-filter-repo-as-a-library-with-the-python-module-interface/64160918#64160918
+
+import git_filter_repo
+
+def blob_callback(blob, callback_metadata):
+    blob.data = blob.data.replace(b'd1', b'asdf')
+
+# Args deduced from:
+# print(git_filter_repo.FilteringOptions.parse_args(['--refs', 'HEAD', '--force'], error_on_empty=False))
+args = git_filter_repo.FilteringOptions.default_options()
+args.force = True
+args.partial = True
+args.refs = ['HEAD']
+args.repack=False
+args.replace_refs='update-no-add'
+
+git_filter_repo.RepoFilter(
+   args,
+   blob_callback=blob_callback
+).run()