[Basic] Binary number to decimal number

Given a Binary Number, Print its decimal equivalent.

Input:

The first line of input contains an integer T denoting the number of test cases. The description of T test cases follows. Each test case contains a single Binary number.

Output:

Print each Decimal number in new line.

Constraints:

1< T <100
1<=Digits in Binary<=8

Example:
Input:
2
10001000
101100

Output:
136
44

def bin_to_decimal(bin_str):
    bin_str = bin_str[::-1]
    answer = 0
    for index, i in enumerate(bin_str):
        answer += int(i) * (2**index)
    return answer

t = int(input())
for i in range(t):
    bin_str = input()
    print(bin_to_decimal(bin_str))