code: def clean_cache():
      
      import importlib
      try:  # Python ver < 3.3
          vermod = importlib.import_module("versioneer")
          globals()["versioneer"] = vermod
      except ImportError:
          importlib.invalidate_caches()
docs: Python won't realise that new module has appeared in the runtime
      We need to clean the cache of module finders. Hacking again
      :return: