在python中返回给定值的唯一索引

my_list = [1, 2, 3, 4, 5, 3, 6]
value = 3
index = my_list.index(value)
print(index)

2

my_list = [1, 2, 3, 4, 5, 3, 6]
value = 3
for index, element in enumerate(my_list):
    if element == value:
        print(index)
        break

2

import numpy as np

my_list = [1, 2, 3, 4, 5, 3, 6]
value = 3
indexes = np.where(np.array(my_list) == value)[0]
print(indexes)

[2 5]