Check the number is divisible by divisor number considering decimal numbers.

is_divisible.py

from decimal import Decimal
import numbers

import unittest

def is_divisible(num, divisor):
  assert isinstance(num, numbers.Number)
  assert isinstance(divisor, numbers.Number)
  
  quotient = Decimal(str(num)) / Decimal(str(divisor))
  return int(quotient) == quotient


class TestNumbers(unittest.TestCase):
  
  def test_is_divisible(self):
    self.assertTrue(numbers.is_divisible(10, 5))
    self.assertTrue(numbers.is_divisible(1, 0.1))
    self.assertTrue(numbers.is_divisible(0.15, 0.05))
    self.assertTrue(numbers.is_divisible(0.00015, 0.00005))
    self.assertFalse(numbers.is_divisible(12, 5))
    self.assertFalse(numbers.is_divisible(1.2, 0.7))
    
    
if __name__ == '__main__':
  unittest.main()