I have a confusion when I do some practice, the code and output are as following,
>>> def fun():
print 'In fun()....'
>>> testfun = fun()
In fun()....
>>> print testfun
None
>>> testfun2 = fun
>>> print testfun2
<function fun at 0x00CC1270>
>>> print testfun2()
In fun()....
None
>>>
what is 'testfun'? Why it is 'None'? And print testfun2(), what is the
meaning of 'None'?
Thanks!
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