[Python-ideas] Consider making enumerate a sequence if its argument is a sequence

[M.-A. Lemburg]

On 30.09.2015 19:19, Neil Girdhar wrote:
> I guess, I'm just asking for enumerate to go through the same change that
> range went through.  Why wasn't it a problem for range?

range() returns a list in Python 2 and a generator in Python 3.

enumerate() has never returned a sequence. It was one
of the first builtin APIs in Python to return a generator:

https://www.python.org/dev/peps/pep-0279/

after iterators and generators were introduced to the language:

https://www.python.org/dev/peps/pep-0234/
https://www.python.org/dev/peps/pep-0255/

The main purpose of enumerate() is to allow enumeration of
objects in a sequence or other iterable. If you need a sequence,
simply wrap it with list(), e.g. list(enumerate(sequence)).

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