On Fri, Dec 21, 2012 at 4:23 PM, iMath <redstone-c...@163.com> wrote:
> Pass and return
> Are these two functions the same ?
>
> def test():
> return
>
> def test():
> pass
They're different statements, but in this case they happen to
accomplish the same thing.
The pass statement means "do nothing". For instance:
while input("Enter 5 to continue: ")!="5":
pass
The return statement means "stop executing this function now, and
return this value, or None if no value".
Running off the end of a function implicitly returns None.
So what you have is one function that stops short and returns None,
and another that does nothing, then returns None. The functions
accomplish exactly the same, as does this:
test = lambda: None
All three compile to the same short block of code - load the constant
None, and return it.
ChrisA
--
http://mail.python.org/mailman/listinfo/python-list
