C#3.0 and lambdas

Christophe chris.cavalaria at free.fr
Wed Sep 21 14:51:20 CEST 2005


Serhiy Storchaka a écrit :
> Roel Schroeven wrote:
> 
>> Fredrik Lundh schreef:
>>
>>> meanwhile, over in python-dev land:
>>>
>>>    "Is anyone truly attached to nested tuple function parameters; 'def
>>>    fxn((a,b)): print a,b'?  /.../
>>>
>>>    Would anyone really throw a huge fit if they went away?  I am willing
>>>    to write a PEP for their removal in 2.6 with a deprecation in 2.5 if
>>>    people are up for it."
>>
>>
>> I for one would not like to see that disappear. I like being able to
>> write, for example:
>>
>> def drawline((x1, y1), (x2, y2)):
>>     # draw a line from x1, y1 to x2, y2
>>     foo(x1, y1)
>>     bar(x2, y2)
>>
>> instead of
>>
>> def drawline(p1, p2):
>>     x1, y1 = p1
>>     x2, y2 = p2
>>     # draw a line from x1, y1 to x2, y2
>>     foo(x1, y1)
>>     bar(x2, y2)
>>
>> or
>>
>> def drawline(p1, p2):
>>     # draw a line from p1[0], p1[1] to p2[0], p2[1]
>>     foo(p1[0], p1[1])
>>     bar(p2[0], p2[1])
> 
> 
>  def drawline(p1, p2):
>      # draw a line from p1 to p2
>      foo(*p1)
>      bar(*p2)
> 

That one is stupid. I don't see how you can make it work without some 
global storing the p1 information in foo which I would consider as very 
ugly code.



More information about the Python-list mailing list