Pycaches are built for specific Python version so it doesn't make much sense to commit them if the end-user will be using a different Python version. [pycache in chapter 3](https://github.com/PacktPublishing/Mastering-Concurrency-in-Python/blob/1fa53540d9d543b472dd67392b8eeecbfa81a754/Chapter03/__pycache__/my_thread.cpython-36.pyc) [pycache in chapter 16](https://github.com/PacktPublishing/Mastering-Concurrency-in-Python/blob/1fa53540d9d543b472dd67392b8eeecbfa81a754/Chapter16/__pycache__/bad_linked_list.cpython-37.pyc)
Pycaches are built for specific Python version so it doesn't make much sense to commit them if the end-user will be using a different Python version.
pycache in chapter 3
pycache in chapter 16