Remove all files .pyc with recrusive method - This method simple but important. Example in your project dir is like this:
project_dir/ __init__.py __init__.pyc something.py something.pyc ... core/ __init__.py __init__.pyc build.py build.pyc
.pyc files one by one would be spending a lot of time. and you will be bored. There is sample how to handle it.
$ find your_dir -name *.pyc -delete
OR, if you work inside current directory.
$ find . -name *.pyc -delete