old_contents: import datetime
  import os
  import sys
  import time
  
  from dear_astrid.constants import *
  from dear_astrid.constants import __all__ as _constants_all
  from dear_astrid.tzinfo import *
  from dear_astrid.tzinfo import __all__ as _tzinfo_all
  
  __all__ = [
    'dtu',
    'u',
    'timezone',
  ] + _constants_all + _tzinfo_all
  
  
  def dtu(*args):
    args = list(args)
    while len(args) < 7:
      args.append(0)
    return datetime.datetime(*(args + [UTC()]))
  
  class timezone(object):
    def __init__(self, tz=None):
      self.tz = tz
      self.orig = None
  
    def set_env(self, tz):
      if tz is None:
        if 'TZ' in os.environ:
          del os.environ['TZ']
      else:
        os.environ['TZ'] = tz
      time.tzset()
  
    def __enter__(self):
      self.orig = os.environ.get('TZ', None)
      self.set_env(self.tz)
  
    def __exit__(self, *args):
      self.set_env(self.orig)
  
  PY3 = False
  try:
    PY3 = (sys.version_info.major == 3)
  except:
    pass
  
  if PY3:
    def u(string):
      return string
  else:
    exec("def u(string):\n  return string + u''\n")
  
new_contents: import datetime
  import os
  import sys
  import time
  
  from dear_astrid.constants import *
  from dear_astrid.constants import __all__ as _constants_all
  from dear_astrid.tzinfo import *
  from dear_astrid.tzinfo import __all__ as _tzinfo_all
  
  __all__ = [
    'dtu',
    'u',
    'timezone',
  ] + _constants_all + _tzinfo_all
  
  
  def dtu(*args):
    args = list(args)
    while len(args) < 7:
      args.append(0)
    return datetime.datetime(*(args + [UTC()]))
  
  class timezone(object):
    def __init__(self, tz=None):
      self.tz = tz
      self.orig = None
  
    def set_env(self, tz):
      if tz is None:
        if 'TZ' in os.environ:
          del os.environ['TZ']
      else:
        os.environ['TZ'] = tz
      time.tzset()
  
    def __enter__(self):
      self.orig = os.environ.get('TZ', None)
      self.set_env(self.tz)
  
    def __exit__(self, *args):
      self.set_env(self.orig)
  
  PY3 = sys.version_info >= (3,)
  
  def u(string):
    if not PY3:
      string = string.decode('utf-8')
    return string
  
subject: Simplify py 2/3 unicode string helper