python - Binary to Decimal converter works backwards -

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i have created basic program converting 8-bit binary decimal, when run program, works backwards, e.g. if enter binary number '00000001' program return 128. here code:

binaryvalue=input("please enter 8 bit binary number.")  binaryvalue=str(binaryvalue)  if len(binaryvalue) <= 8:      print("your number accurate.")     value_index=0     total=0     print("your number valid.")     in range(len(binaryvalue)):         total = total + (int(binaryvalue[value_index])) * 1 * (2**(value_index))         value_index = value_index+1     print("your decimal number is: "+str(total))

so, mentioned jonrsharpe , moe

reverse input:

binaryvalue = str(binaryvalue)[::-1]

or, can place offset in power:

total = total + (int(binaryvalue[value_index])) * 1 * (2**(len(binaryvalue)-value_index-1))

both doing same thing though.


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