在3.x程序中有条件地将python代码的某些部分作为2.x执行

Question

There is an option of __future__ to import modules from python 3.x into 2.x venv. Is there a similar option that allows 2.x code to be run in 3.x venv.

Some thing like

__use2.x__:
   #2.x code block

#back to 3.x code 

This is to be used to merge codes from different versions while upgrading to a higher level of python.

Answer 1

There are several modules that may prove helpful (hard to say which is best or how to do it, without knowing anything about the code you are talking about). But for starters I'd recommend:

• 2to3

• futurize