python convert a binary number to a decimal number
def binToDec(num):
temp = str(num)
arr = []
final = []
for i in temp:
arr.append(i)
arrNums = [str(x) for x in arr]
arrNums.reverse()
j = 0
for i in range(0, len(arrNums)):
factor = arrNums[i]*(2**j)
j += 1
final.append(factor)
decimal = 0
for i in range(0, len(final)):
decimal += final[i]
return decimal
if __name__ == "__main__":
num = 101000
print(binToDec(num)) # Expected Output : 40