code: def _ftp_pwd(self):
          
          try:
              return self.ftp.pwd()
          except UnicodeEncodeError:
              if compat.PY2 or self.ftp.encoding != "utf-8":
                  raise  # should not happen, since Py2 does not try to encode
              # TODO: this is NOT THREAD-SAFE!
              prev_encoding = self.ftp.encoding
              try:
                  write("ftp.pwd() failed with utf-8: trying Cp1252...", warning=True)
                  return self.ftp.pwd()
              finally:
                  self.ftp.encoding = prev_encoding
docs: Variant of `self.ftp.pwd()` that supports encoding-fallback.
  
          Returns:
              Current working directory as native string.