old_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))
  
new_contents: import os
  import sys
  
  path = os.path.dirname(__file__)+os.path.sep+'python'+str(sys.version_info[0])
  sys.path.insert(0, path)
  del sys.modules['httplib2']
  import httplib2
  
subject: Rewrite python version dependent import