[ python-Feature Requests-912738 ] Generator-support in map() and filter()

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Feature Requests item #912738, was opened at 2004-03-09 09:13
Message generated for change (Comment added) made by tim_one
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https://sourceforge.net/tracker/?func=detail&atid=355470&aid=912738&group_id=5470

Category: Python Interpreter Core
Group: None
>Status: Closed
>Resolution: Rejected
Priority: 5
Submitted By: Ragnar Kjørstad (ragnark)
Assigned to: Nobody/Anonymous (nobody)
Summary: Generator-support in map() and filter()

Initial Comment:
The current implementation of map() and filter()
returns a list when executed on any iterator, including
generators.

However, it may be very useful to map and filter the
output from generators without having to generate all
the data and allocate memory for it.

I would propose for map() and filter() to return a
generator-object instead of a list when the
input-argument is a generator.

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>Comment By: Tim Peters (tim_one)
Date: 2004-03-09 15:11

Message:
Logged In: YES 
user_id=31435

It's (far) too late to change the signature of map() and filter
().  Look in the itertools module instead:  its ifilter() and imap
() functions already do what you asked for (and more).

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You can respond by visiting: 
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