Just wondering

[Jaime Fernandez del Rio]

> (1) building another throwaway list and
> (2) function call overhead for calling doit()
>
> You can avoid (1) by using filter() instead of map()

Are you sure of this? My python returns, when asked for help(filter) :

Help on built-in function filter in module __builtin__:

filter(...)
    filter(function or None, sequence) -> list, tuple, or string

    Return those items of sequence for which function(item) is true.  If
    function is None, return the items that are true.  If sequence is a tuple
    or string, return the same type, else return a list.

I'm afraid there is no builtin function to do an inplace modification
of a sequence...


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