Thank you for your patient answer, but I still don't understand.I have uploaded my file (*.py).I hope you can solve my problem. I want 'a=5/6' to return 'a= 0.833333333333333...... 'after compilation.

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发件人:                                                                                                                        "Python tracker"                                                                                    <report@bugs.python.org&gt;;
发送时间:&nbsp;2021年5月19日(星期三) 凌晨0:41
收件人:&nbsp;"坏蛋"<792641209@qq.com&gt;;

主题:&nbsp;[issue44171] Cython cannot compile 'a = 5/6' and return 'a = 0'

Eric V. Smith <eric@trueblade.com&gt; added the comment:

Please report this to the Cython bug tracker: https://github.com/cython/cython/issues/

When you do that, you'll want to show the actual code you're having a problem with. You're using both "//" and "/" here. As Pablo said, you're probably having a problem with integer division ("//").

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