Convert decimal to binary

project_decimal_to_bin.py

from decimal import Decimal as D
from math import pi, e

def convert(n, d=8):
    """
    convert decimal to binary
    """
    res = bin(int(n))[2:] + "."
    x = D(n - int(n))
    while d != 0:
        x *= 2
        res += str((x % 2).to_integral_value())
        d -= 1
    return res

tests = [1.5, 3.65, 12.12, pi, e]

for test in tests:
    print(convert(test))