Different Python versions when launching from Terminal/C++ program

Question

If I launch python --version from Terminal on macOS, I'm getting 3.9 version. The same is for python3.

But if I launch these from my C++ program (I use QProcess), I'm getting 2.7 for python and 3.7 for python3.

Why so?

Is there any way to launch the same python version as terminal launches?

Is there a way to find path to the latest python installed on the machine (I need to support macOS and Linux).

Addition #1. On another macOS machine, there is Python 3.10 installed in /Applications folder. python3 --version shows expected 3.10 version, but my C++ program does not even see this python3, so macOS displays its system error message which suggests the user to install additional components (which does not work through).

@Devstorm21 What is it and how to use it from my C++ program? — Alexander Dyagilev
– Alexander Dyagilev, Commented Oct 25, 2021 at 14:40
It might be helpful for you. stackoverflow.com/questions/14685798/… — Devstorm
– Devstorm, Commented Oct 25, 2021 at 14:43

John Kugelman · Accepted Answer · 2021-11-02 14:30:03Z

0

This is an issue with macOS. An app launched from the Dock has a different PATH environment variable than the shell has. Here is a question about how to fix this: Get bash $PATH from C++ program

edited Nov 2, 2021 at 14:30

John Kugelman

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answered Nov 2, 2021 at 9:51

Alexander Dyagilev

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