Searching a large dictionary

[Support Desk]

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}]



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