find_index python Code Snippet in 2024
listintermediate
Last Updated: 16 December 2024
Finds the index of the first element in the given list that satisfies the provided testing function.
- Use a list comprehension,
enumerate()andnext()to return the index of the first element inlstfor whichfnreturnsTrue.
def find_index(lst, fn):
return next(i for i, x in enumerate(lst) if fn(x))find_index([1, 2, 3, 4], lambda n: n % 2 == 1) # 0
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