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find_key python Code Snippet in 2024

dictionaryintermediate

Last Updated: 18 June 2024

Finds the first key in the provided dictionary that has the given value.

  • Use dictionary.items() and next() to return the first key that has a value equal to val.
def find_key(dict, val): return next(key for key, value in dict.items() if value == val)
ages = { 'Peter': 10, 'Isabel': 11, 'Anna': 9, } find_key(ages, 11) # 'Isabel'

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