30-seconds-of-code/snippets/python/s/key-in-dict.md

title, type, language, tags, cover, dateModified

title	type	language	tags	cover	dateModified
Key in dictionary	snippet	python	dictionary	rocky-mountains	2020-10-16T21:30:49+03:00

Checks if the given key exists in a dictionary.

• Use the in operator to check if d contains key.

def key_in_dict(d, key):
  return (key in d)

d = {'one': 1, 'three': 3, 'five': 5, 'two': 2, 'four': 4}
key_in_dict(d, 'three') # True