擅长:python、mysql、java
<p>您可能正在运行python3,而该类正在使用python2。print语句在版本之间会发生变化-请尝试此操作以确保。<a href="https://stackoverflow.com/questions/1093322/how-do-i-check-what-version-of-python-is-running-my-script">How do I check what version of Python is running my script?</a></p>