R's which() and which.min() Equivalent in Python

Question

I read the similar topic here. I think the question is different or at least .index() couldnot solve my problem.

This is a simple code in R and its answ

Answer 1

A simple loop will do:

res = []
x = [1,2,3,4,0,1,2,3,4,11] 
for i in range(len(x)):
    if check_condition(x[i]):
        res.append(i)

One liner with comprehension:

res = [i for i, v in enumerate(x) if check_condition(v)]

Here you have a live example