code: def intcomma(value):
      
      try:
          if isinstance(value, compat.string_types):
              float(value.replace(',', ''))
          else:
              float(value)
      except (TypeError, ValueError):
          return value
      orig = str(value)
      new = re.sub("^(-?\d+)(\d{3})", '\g<1>,\g<2>', orig)
      if orig == new:
          return new
      else:
          return intcomma(new)
docs: Converts an integer to a string containing commas every three digits.
      For example, 3000 becomes '3,000' and 45000 becomes '45,000'.  To maintain
      some compatability with Django's intcomma, this function also accepts
      floats.