input: Write a python function to identify characters from a given string and return them as a list.
  assert identify_characters('ABCDEFGHIJKLMNOPQRSTUVWXYZ') == ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z']
  assert identify_characters('hello') == ['h', 'e', 'l', 'l', 'o']
  assert identify_characters('12345') == ['1', '2', '3', '4', '5']
output: def identify_characters(s):
      return list(s)