class_docstr: UTC
code: def tzname(self, dt):
      return "UTC"
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import datetime
  import math
  import time
  from .py3 import string_types
label_desc: Use image node_id 2 for calling the _UTC obj's underlying member method code with example usage: obj.tzname(dt) and returns: str