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Re: Pass and return

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On 12/21/2012 12:23 AM, iMath wrote:
> Pass and return
> Are these two functions the same ?
>
> def test():
> 	return
>   
> def test():
> 	pass

I believe they are the same, but these statements have
different meanings in other circumstances, e.g.:

Class A(object): pass

def test():
   if x: return
   else: # do something

In first example, (in a class), return would be invalid.

In second example, return would return None from function,
pass would result in continuing execution after if/else block.

Btw you can use disassemble function to look into what
these functions do:

 >>> def a(): pass
 >>> def b():return
 >>> from dis import dis
 >>> dis(a)
   1           0 LOAD_CONST               0 (None)
               3 RETURN_VALUE
 >>> dis(b)
   1           0 LOAD_CONST               0 (None)
               3 RETURN_VALUE


So indeed they should be the same..

  -m

-- 
Lark's Tongue Guide to Python: http://lightbird.net/larks/

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Pass and return iMath <redstone-cold@163.com> - 2012-12-20 21:23 -0800
  Re: Pass and return Mitya Sirenef <msirenef@lightbird.net> - 2012-12-21 00:40 -0500
  Re: Pass and return Mitya Sirenef <msirenef@lightbird.net> - 2012-12-21 00:45 -0500
    Re: Pass and return Duncan Booth <duncan.booth@invalid.invalid> - 2012-12-21 08:52 +0000
      Re: Pass and return Mitya Sirenef <msirenef@lightbird.net> - 2012-12-21 12:15 -0500
  Re: Pass and return Chris Angelico <rosuav@gmail.com> - 2012-12-21 17:19 +1100
  Re: Pass and return Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-12-21 08:27 +0000
  Re: Pass and return iMath <redstone-cold@163.com> - 2012-12-22 07:11 -0800

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