Python – Check if key exists in dictionary

By mkyong | Updated: September 22, 2015

Viewed: 2,366 (+19 pv/w)

Tags: dict python

In Python, you can use the in operator to check if a key exists in a dictionary.

def main():
    fruits = {
        'apple':1,
        'orange':2,
        'banana':3
    }
    
	#if key 'apple' exists in fruits?
    if 'apple' in fruits:
        print(fruits['apple'])
    
if __name__ == '__main__':
    main()

Output

1

P.S Tested with Python 3.4.3

References

1. Python doc Builtins – Removed. dict.has_key()