Check if dictionary contain another dictionary

Question

I have 2 dictionaries:

dict1 = {"Name":"x", "Surname":"y", "Age":30}

dict2 = {"Name":"x", "Surname":"y"}

I want a condition like this:

if dict2 in dict1:
    return True

If I run this code it returns:

TypeError: unhashable type: 'dict'

Solutions?

`in` compares keys, and expects the value you're comparing is a valid type to be a key. You can't have a `dict` as a key as it's unhashable. — Peter Wood, Jul 19 '21 at 08:18

score 2 · Answer 1 · answered Jul 19 '21 at 08:19

2

You could do the following:

all(item in dict1.items() for item in dict2.items())

you will have to iterate on the dicts elements

answered Jul 19 '21 at 08:19

David

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Arkistarvh Kltzuonstev · Answer 2 · 2021-07-19T10:48:12.277

2

This should work for you if you only want to check whether the keys are already present :

if all(key in dict1 for key in dict2):
    return True

If you want to check whether the values also match as well, try this :

if all(kv in dict1.items() for kv in dict2.items()):
    return True

edited Jul 19 '21 at 10:48

answered Jul 19 '21 at 08:20

Arkistarvh Kltzuonstev

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This does not check whether the `values` match also. This is, according to the example posted by OP, what OP actually wants. – Captain Trojan Jul 19 '21 at 08:23
@CaptainTrojan In the question it was not explicit. Anyway updated. – Arkistarvh Kltzuonstev Jul 19 '21 at 10:49
I changed my -1 to +1, but do you actually believe that? Why would they specify both `names` as `x` and `surnames` as `y`? Do you think that's coincidence? That it is not safe to assume OP wanted precisely this? – Captain Trojan Jul 19 '21 at 11:36

score 1 · Accepted Answer · answered Jul 19 '21 at 08:19

1

You can do:

dict1 = {"Name": "Bob", "Surname": "Smith", "Age": 30}

dict2 = {"Name": "Bob", "Surname": "Smith"}

print(all(dict1[k] == v for k, v in dict2.items()))

answered Jul 19 '21 at 08:19

funnydman

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Check if dictionary contain another dictionary

3 Answers3