Hi, i'm confused by a piece of code with parenthese as this:
----------------code 1------------------------------ >>> def outer(): ... def inner(): ... print 'inside inner' ... return inner ... >>> foo = outer() >>> foo <function inner at 0x9546668> >>> foo() inside inner ----------------code 2------------------------------- >>> def outer(): ... def inner(): ... print 'inside inner' ... return inner() ... >>> foo = outer() inside inner >>> foo >>> foo() Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'NoneType' object is not callable the difference between these two piece of code is that the code 2 has a "()" when "return inner". My questions are: (1) what is the function difference between these two pieces of code? what does "return inner()" and "return inner" mean? (2) when foo = outer() is run, why output is defferent for two pieces of code? thanks -- https://mail.python.org/mailman/listinfo/python-list
