Why python doesn't use syntax like function(, , x) for default parameters?

[Diez B. Roggisch]

Antoon Pardon wrote:

>>
>> Specifying the names of the keyword parameters costs you a little typing
>> once, but saves everybody (including yourself) a lot of grief later when
>> you're trying to figure out what the heck your code does 6 months later.
> 
> Could you explain what is so hard in figuring out:
> 
>   func(,,4)
> 
> We sure don't seem to have a problem with figuring out things like
> 
>   lst[::2]

That is the usual polemics. Its a HUGE difference if I'm supposed to
remember 2 default values that are 0 and <size-of-sequence>, in a
specialized syntax, than arbitrary values

f(,,,,,3)

in some arbitrary function. 
 
Diez