All indexes of value
Returns a list of indexes of all the occurrences of an element in a list.
- Use
enumerate()
and a list comprehension to check each element for equality withvalue
and addingi
to the result.
def index_of_all(lst, value): return [i for i, x in enumerate(lst) if x == value] index_of_all([1, 2, 1, 4, 5, 1], 1) # [0, 2, 5] index_of_all([1, 2, 3, 4], 6) # []