input: Write a python function to convert a list of integers to their binary representation.
  assert int_to_bin([2, 4, 7]) == ['0b10', '0b100', '0b111']
  assert int_to_bin([1, 5, 10]) == ['0b1', '0b101', '0b1010']
  assert int_to_bin([0, 3, 8]) == ['0b0', '0b11', '0b1000']
output: def int_to_bin(lst):
      return [bin(x) for x in lst]