Finds the index of the last element in the given list that satisfies the provided testing function.
- Use a list comprehension,
enumerate()
andnext()
to return the index of the last element inlst
for whichfn
returnsTrue
.
代码实现
def find_last_index(lst, fn):
return len(lst) - 1 - next(i for i, x in enumerate(lst[::-1]) if fn(x))
使用样例
find_last_index([1, 2, 3, 4], lambda n: n % 2 == 1) # 2
翻译自:https://www.30secondsofcode.org/python/s/find-last-index