On Aug 26, 10:49 am, "++imanshu" <[EMAIL PROTECTED]> wrote:
> Hi,
>
> Wouldn't it be nicer to have 'in' return values (or keys) for both
> arrays and dictionaries.
>
NO!
When you iterate over a list (or even a array) it is the members of
the list in the order they appear that is of interest. When you
iterate over a dictionary it is the relationship between the (unique)
key and the (possibly non-unique) value that is of interest. Moreover
the sequence of values in a dictionary lacks meaning.
What is the 'key' of a list? It's index? It would be cumbersome to
iterate over the range(len(<list>)) and then have to use the index
values to pull out the values from that list. On the otherhand it
would be useless for 'in' (in the sense of for x in {...}) to return a
series of unordered values, with no way to get at the key, rather than
keys (from which the values are directly accessible).
And what would you like file_like objects, for example, to return?
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