Searching a large dictionary

Simon Forman sajmikins at gmail.com
Wed Sep 23 00:26:04 CEST 2009


On Tue, Sep 22, 2009 at 5:50 PM, Support Desk
<support.desk.ipg at gmail.com> wrote:
> I need help searching a large python dictionary. The dictionary is setup
> like so
>
> Key[{'item':value,'item2':value,'item3':value,'item4':value,'item5':value','item6':value,'item7':value,'item8':value,'item9':value}]
>
> Key2[{'item':value,'item2':value,'item3':value,'item4':value,'item5':value','item6':value,'item7':value,'item8':value,'item9':value}]
>
> Key3[{'item':value,'item2':value,'item3':value,'item4':value,'item5':value','item6':value,'item7':value,'item8':value,'item9':value}]
>

These look like you're indexing objects Key, Key2, Key3 by
dictionaries, or possibly these are the result of printing dict-like
objects with custom __repr__() methods.  Could you give more
information about what's actually going on here?

> What would be the best way to search for a specific value of item1 and add
> all the results to a new dictionary? Thanks

"Searching" a dict is accomplished by simply asking for the key:  d['item1']

I'm going to guess you meant something like this:

list_of_dicts = [Key, Key2, Key3]
new_dict = {}

for i, k in enumerate(list_of_dicts):
    value = k['item1']
    if value == some_specific_value:
        new_dict[i] = value


But it's not really clear from your post exactly what you meant to ask.

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