req_uninstall.py 文件源码

def add(self, path):
        head, tail = os.path.split(path)

        # we normalize the head to resolve parent directory symlinks, but not
        # the tail, since we only want to uninstall symlinks, not their targets
        path = os.path.join(normalize_path(head), os.path.normcase(tail))

        if not os.path.exists(path):
            return
        if self._permitted(path):
            self.paths.add(path)
        else:
            self._refuse.add(path)

        # __pycache__ files can show up after 'installed-files.txt' is created,
        # due to imports
        if os.path.splitext(path)[1] == '.py' and uses_pycache:
            self.add(cache_from_source(path))