Python forward reference

Source: Internet
Author: User
Tags function definition

That is, the function call precedes the function definition

Can do this

def BBB ():    print (' This is B ')    aaa () def aaa ():    print (' The ' a ') BBB ()--------->this is bthis a

Can do this

def aaa ():    print (' This was a ') def BBB ():    print (' This is B ')    aaa () BBB ()----------->this are bthis is a

But you can't do that.

def BBB ():    print (' This is B ')    aaa () BBB () def aaa ():    print ("This is a")--------->traceback (most recent Call last): The IS-b  file "e:/pycharm/", line +, in <module>    BBB ()  file "e:/pycharm/ ", line 599, in BBB    aaa () Nameerror:name ' AAA ' are not defined


Python forward reference

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