30-seconds-of-code/snippets/key_in_dict.md

title, tags, expertise, author, cover, firstSeen, lastUpdated

title	tags	expertise	author	cover	firstSeen	lastUpdated
Key in dictionary	dictionary	beginner	maciv	blog_images/rocky-mountains.jpg	2020-10-16T21:30:49+03:00	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