Working with Python2 and Python3 in the same project

Question

My main app is running with Python3

I have a crucial package that I need to install which only support Python2...

I'm running on windows

I thought of maybe setting this package on another virtual environment in addition to a flask server to be used for communication.

Is there another way to pipe messages between apps beside a server?

Is there a better way to go for Python2, Python3 mix?

maybe ask about the packages you're using... there might be alternatives to the package or maybe alternatives to the packages that are forcing you to use python 3 — AntiMatterDynamite, Jun 17 '18 at 07:56

score 6 · Answer 1 · answered Jun 17 '18 at 07:55

6

How about using the subprocess module. You can start the Python 2 program as a subprocess of your Python 3 app. They can communicate via the subprocess PIPE.

answered Jun 17 '18 at 07:55

malukas

106
3

score 1 · Answer 2 · answered Jun 17 '18 at 08:44

1

Flask is too heavy. Why not use socket and selectors? offical example

answered Jun 17 '18 at 08:44

Rouzip

101
3

is your answer to this question? – Evgeny Jun 17 '18 at 10:25
1

In my opinion, just building a socket for send&receive message is convenient and light way which communicate between Python2 and Python3. – Rouzip Jun 18 '18 at 02:27
was just confused why you implied OP uses flask – Evgeny Jun 18 '18 at 02:30
oh, I see in the middle now – Evgeny Jun 18 '18 at 02:31

score 0 · Answer 3 · answered Nov 10 '21 at 12:11

Unfortunately, I got the similar problem lately and would like to share my solution. I used multiprocssing.connection module. The default pickling protocol should be changed when sending the data from Python 3 to Python 2. The way to change the default pickling protocol is described in this answer.

Working with Python2 and Python3 in the same project

3 Answers3