[Python-ideas] Allow key='attribute_name' to various sorting functions

[Ram Rachum]

I often want to sort objects by an attribute. It's cumbersome to do this:

    sorted(entries, key=lambda entry: entry.datetime_created)

Why not allow this instead:

    sorted(entries, key='datetime_created')

The `sorted` function can check whether the `key` argument is a string, and 
if so do an attribute lookup.

Since I see no other possible use of a string input to `key`, I don't see 
how this feature would harm anyone.

What do you think?


Thanks,
Ram.
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