Converting Bases to Python

Question

The code below takes a decimal number and converts to bases from 2 to 9

def converte(numDecimal, base):
    if numDecimal != 0:
        numConvertido = ""
        while numDecimal > 0:
            resto = numDecimal % base
            numConvertido = str(resto) + numConvertido
            numDecimal = numDecimal // base
    else:
        numConvertido = "0"
    return numConvertido


n = int(input())
while n != -1:
    for b in range(2, 9 + 1):
        r = converte(n, b)
        print(r, end=" ")
    print()
n = int(input())

If now I want to do the opposite, and receive a binary number and convert to bases from 3 to 10, for example, as I would?

Answer 1

Oops, greetings! Dude there is an easier way to convert numbers on different bases to integers on decimal basis, I’ll give you an example below: Below is a conversion of a binary number(String) to the decimal basis:

b = '0111'
print(int(b, 2))
>> 7

int() in this case takes two parameters, the first being the number to be converted that must be passed as string, and the second the base it is on, so we can do another example where a number is at base 5 and we want to convert it to decimal:

b = '0410'
print(int(b, 5))
>> 105

Knowing this, I think it makes it much easier to build your code! Now being direct to your question, when receiving a binary number and want to pass it to other bases, it would be better to convert it to decimal and then to the base in question using the function you already have.