old_contents: import inspect
  import python2.httplib2 as httplib2
  globals().update(inspect.getmembers(httplib2))
  
new_contents: import inspect
  import sys
  if sys.version_info[0] == 2:
      from .python2 import httplib2
  else:
      from .python3 import httplib2
  globals().update(inspect.getmembers(httplib2))
  
subject: Use python version dependent import