python编程，同志们给个完整程序叭

def get_indices(lst,n):
    res = []
    for i,j in enumerate(lst):
        if j==n:
            res.append(i)
    return res

print(get_indices(['a','a','b','a','b','a'],'a'))
print(get_indices([1,5,5,2,7],7))
print(get_indices([1,5,5,2,7],5))
print(get_indices([1,5,5,2,7],8))