python needs leaning stuff from other language

[Emile van Sebille]

Esmail wrote:
> Diez B. Roggisch wrote:
>> online.service at ymail.com schrieb:
>>> python's list needs a thing  list.clear()  like c# arraylist
>>> and
>>
>> some_list[:] = []
> 
> I agree that this is nice and clear, but as a relative newbie
> wouldn't
> 
> some_list = []

This is different -- it creates a new list.  Consider:

 >>> some_list = [1,2,3]
 >>> d = some_list
 >>> d[1]
2
 >>> some_list[:] = ['a','b','c']
 >>> d[1]
'b'
 >>> some_list = [1,2,3]
 >>> d[1]
'b'

the [:] form allows references into the list to remain valid while the
direct assignment dopes not.

Emile



> 
> be also acceptable (and pythonic?)?
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>