CODEWITHSUNDEEP
pythondictionary
jath03
jath03

Reputation: 2359

Check if a string appears in any of the keys of a dictionary

I'm trying to check if a string is in one of the keys of a dictionary. 

if message in a_dict: # this will only work if message is exactly one of the keys
    #do stuff

I want the condition to return True even if message is only part of one of a_dict's keys.

How would I do that? Is there a way to add a regex .* in the string? Or is there a better way?

Upvotes: 7

Views: 8505

Answers (2)

Daniel
Daniel

Reputation: 42758

You can use any:

elif any(message in key for key in a_dict):
    do_something()

If you need also the key which contains the message:

else:
    key = next((message in key for key in a_dict), None)
    if key is not None:
        do_something(key)

Upvotes: 12

Horia Coman
Horia Coman

Reputation: 8781

You can't really do what you want with Python's in operator. It's best to do the check by hand - iterate over all the keys and see if any of them contains your message.

Upvotes: 0

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