[Tutor] changing dictionary to lowercase

[Steve Willoughby]

On 27-Oct-11 11:25, ADRIAN KELLY wrote:
>
> Hi all,
> is it possible to change a dictionary list to lowercase..without having
> to retype?
> e.g. definitions={"Deprecated": "No longer in use", "Depreciation":
> "fall in value of an asset"}
>
> i have tried definitions=definitions.lower()

lower() is not a dictionary method, it's a string method (i.e., 
dictionaries have no idea how to lowercase themselves, but strings do).

So what you need to do is iterate over the list of dictionary members 
and re-create a new dictionary with lowercased versions of the strings 
(that's easier than changing the dictionary in-place, especially if 
you're lowercasing the keys, since keys are immutable--you'd have to 
delete the old one and re-store the data under the lowercased key anyway)

There are several ways to do that, including loops and list comprehensions.

Does that nudge you in the right direction?

If you're still stuck, let us know.
--steve

-- 
Steve Willoughby / steve at alchemy.com
"A ship in harbor is safe, but that is not what ships are built for."
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