An easy library for Python file locking. It works on Windows, Linux, BSD and Unix systems and can even perform distributed locking. Naturally it also supports the with statement. - wolph/portalocker
extern_url : str or None, optional The external url if package is not hosted on PyPI. For example, you can install a package using: "pip install git+http://github.com/user/repo/tarball/master/egginfo=xxx". In this case, you can pass the url to the extern_url. Returns --- <class...