code: def path_from_uri(self, uri):
          
          (scheme, netloc, path, params, query, frag) = urlparse(uri)
          if (netloc == ''):
              return(uri)
          path = '/'.join([netloc, path])
          path = re.sub('[^\w\-\.]', '_', path)
          path = re.sub('__+', '_', path)
          path = re.sub('[_\.]+$', '', path)
          path = re.sub('^[_\.]+', '', path)
          return(path)
docs: Make a safe path name from uri.
  
          In the case that uri is already a local path then the
          same path is returned.