Function to convert integer to binary with a fixed length

int2bin.py

import sys
import math

MAXIMUM_SIZE = math.ceil(math.log(sys.maxsize, 2))


def int2bin(integer, length=MAXIMUM_SIZE):
    """
    Returns the `integer` as an unsigned binary string with a fixed `length` in bits.
    Truncates to the `length` in bits to prevent overflow.
    """
    max_integer, integer = 2 ** max_size - 1, abs(integer)
    return ("0b{0:0={1}b}").format(
        integer if integer < max_integer else max_integer,
        max_size,
    )