Convert decimal/base 10 numbers to hexidecimal/base 16

gistfile1.py

def hex2dec(dec_number):

  mapping = {
    10 : "A",
    11 : "B",
    12 : "C",
    13 : "D",
    14 : "E",
    15 : "F"
  }
  
  remainders = []
  Q = dec_number

  while Q > 0:

    Q = dec_number / 16
    R = (dec_number % 16)
    if R > 9:
      remainders.append(mapping[R])
    else:
      remainders.append(R)
    dec_number = Q

  remainders = remainders[::-1]
  hex = "0x"
  for item in remainders:
    hex.join(item)

  return hex


hex2dec(954)
iteration 1: Q = 59, R = 10, A
remainders = ["A"]
dec_number = 59
iteration 2: 59/16 = 3, R = 11, B
remainders = ["A", "B"]
dec_number = 3
iteration 3: 3/16 = 0, R = 3, 3
remainers = ["A","B",3]
hex = 3BA