python 前向引用

標籤：call   ast   efi   pycha   函數   name   trace   erro   err   

 即函數調用在函數定義之前

 

可以這樣

def bbb():    print(‘this is b‘)    aaa()def aaa():    print(‘this is a‘)bbb()--------->this is bthis is a

可以這樣

def aaa():    print(‘this is a‘)def bbb():    print(‘this is b‘)    aaa()bbb()----------->this is bthis is a

但不可以這樣

def bbb():    print(‘this is b‘)    aaa()bbb()def aaa():    print(‘this is a‘)--------->Traceback (most recent call last):this is b  File "E:/pycharm/TEST.py", line 600, in <module>    bbb()  File "E:/pycharm/TEST.py", line 599, in bbb    aaa()NameError: name ‘aaa‘ is not defined

　　

python 前向引用