code: def open(
          self,
          fs_url,  # type: Text
          writeable=True,  # type: bool
          create=False,  # type: bool
          cwd=".",  # type: Text
          default_protocol="osfs",  # type: Text
      ):
          # type: (...) -> Tuple[FS, Text]
          
          if "://" not in fs_url:
              # URL may just be a path
              fs_url = "{}://{}".format(default_protocol, fs_url)
  
          parse_result = parse_fs_url(fs_url)
          protocol = parse_result.protocol
          open_path = parse_result.path
  
          opener = self.get_opener(protocol)
  
          open_fs = opener.open_fs(fs_url, parse_result, writeable, create, cwd)
          return open_fs, open_path
docs: Open a filesystem from a FS URL.
  
          Returns a tuple of a filesystem object and a path. If there is
          no path in the FS URL, the path value will be `None`.
  
          Arguments:
              fs_url (str): A filesystem URL.
              writeable (bool, optional): `True` if the filesystem must be
                  writeable.
              create (bool, optional): `True` if the filesystem should be
                  created if it does not exist.
              cwd (str): The current working directory.
  
          Returns:
              (FS, str): a tuple of ``(<filesystem>, <path from url>)``