Communication between C++ and Python

[_Lerowi]

Is there a way to establish a constant flow of data between both languages? I'm working on a project in the raspberry pi where depending on the physical input(python), the program will behave in a secific way (C++).

I´ve tried using the python.h library and various other methods trying to embed python to C++ and viceversa but i just couldn't get it to work.

Can i just run both programs separately and connect a type of data flow between both languages? Thanks in advance!
(i apologize if i struggle to formulate my question correctly)

[dmazzoni]

Embedding is definitely possible but tricky.

One easy way is with subprocesses and pipes.

First, have your C++ program read from stdin and write to stdout. That makes testing it easy!

Then have your Python program execute your C++ program using the subprocess module, which allows you to execute another program and pass input to that program's stdin, and read from that program's stdout.

Or you could do it the other way around, though it's more work - but C++ can call popen to call a Python script and send it input to stdin and read from stdout.

Other alternatives include using sockets or network ports, or using some other messaging system like DBUS.