exclude_paths doesn't do what you expect

[boxed]

https://github.com/henrikh/mutmut-exclude-path for a reproduction scenario.

Basically paths_to_exclude=some/folder/ should be understood correctly.

[M3ssman]

@boxed
I guess this happens by the way traversing with os.walk is done.

If you comsume subdirs like in

mutmut/mutmut/__init__.py

Line 1223 in c59fc4b

def python_source_files(path, tests_dirs, paths_to_exclude=None):

you have only B , not main/B.

Give this a try:

[mutmut]
paths_to_mutate=main
paths_to_exclude=B
runner=python -m unittest discover tests --failfast