Check if a key exists in a dictionary

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Check if a key exists in a dictionary

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#1 by (2 votes)

1

How can I check if a key exists inside a dictionary in Python?

python python-3.x

asked by anonymous 18.07.2017 / 01:15

1 answer

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score 2 · Accepted Answer

To check if a key exists in a dictionary in Python, just do:

if "chave" in dicionario:
    print("O dicionário possui a chave")

That is, if we consider the dictionary:

d = {'a': "Valor de A", 'b': "Valor de B"}

We can do:

if 'a' in d:
    print("Dicionário possui a chave 'a'")

if 'b' in d:
    print("Dicionário possui a chave 'b'")

if 'c' in d:
    print("Dicionário possui a chave 'c'")

See working at Ideone

The output generated is:

Dicionário possui a chave 'a'
Dicionário possui a chave 'b'