Change these two functions in pyrebase to avoid the problem in closing stream.

pyrebase_fix_python_2.17.py

class ClosableSSEClient(SSEClient):
  def close(self):
      self.should_connect = False
      self.retry = 0
      try:
          self.resp.raw._fp.fp._sock.shutdown(socket.SHUT_RDWR)
          self.resp.raw._fp.fp._sock.close()
      except AttributeError:
          pass
        
class Stream:
  def close(self):
        while not self.sse and not hasattr(self.sse, 'resp'):
            time.sleep(0.001)
        self.sse.running = False
        self.sse.close()
        #comment out join
        # self.thread.join()
        return self

@PreshantAhar You can edit the file by logging in to your raspberry pi and use nano or vim to edit the file.