Python: NameError: global name 'foobar' is not defined

问题:

I have written the following class:

class myClass(object):     def __init__(self):         pass      def foo(self, arg1, arg2):         pp = foobar(self, arg1, arg2)         if pp:             return 42         else             return -666       def foobar(self, arg1, arg2):         if arg1 == arg2:             return 42         else:             return None 

The logic is nonsensical - ignore it. What I am trying to so is to call an instance method from another instance method - and I am getting a NameError. I originally thought that this was due to foo() calling foobar() before it had been defined - but switching the order of the function definitions in the script made no difference.

Does anyone what's causing this error, and how to fix it?

回答1:

Python doesn't scope code to the local class automatically; you need to tell it to.

pp = self.foobar(arg1, arg2) 

http://docs.python.org/tutorial/classes.html

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