invalid syntax

[SmasterZheng]

simple.py line 54
self.async

[oolongtea]

same error with python 3.10.6 and kafka==1.3.5

Traceback (most recent call last):
  File "/home/.../my-script.py", line 7, in <module>
    from kafka import KafkaConsumer, KafkaProducer
  File "/home/.../my-env/lib/python3.10/site-packages/kafka/__init__.py", line 23, in <module>
    from kafka.producer import KafkaProducer
  File "/home/.../my-env/lib/python3.10/site-packages/kafka/producer/__init__.py", line 4, in <module>
    from .simple import SimpleProducer
  File "/home/.../my-env/lib/python3.10/site-packages/kafka/producer/simple.py", line 54
    return '<SimpleProducer batch=%s>' % self.async
                                              ^^^^^
SyntaxError: invalid syntax

[wbarnha]

SimpleProducers and other Simple classes were removed in #1196. Upgrading your kafka-python installation is recommended.