Flask 不能由 PHP 执行 - 没有名为 flask 的模块

Question

Heey, I have a PHP script that is supposed to start a Python flask file with the exec command. My problem is that the file always has an error after executing:

Traceback (most recent call last): File "/opt/lampp/htdocs/memeon_data/Python-3.8.3/main.py", line 2, in from flask import Flask, request, jsonify, render_template, Response ImportError: No module named flask

If I run the script in the terminal, it works without problems. I did not activate the Virtualenv in the PHP script because it causes another error and I read that you no longer need it in the new versions. Maybe someone knows the answer?

PHP:

echo shell_exec ("python /opt/lampp/htdocs/memeon_data/Python-3.8.3/main.py 2> & 1");

Terminal:

source /opt/lampp/htdocs/memeon_data/Python-3.8.3/venv/bin/activate

python /opt/lampp/htdocs/memeon_data/Python-3.8.3/main.py

Answer 1

You have to activate venv to use python with Flask

You can create bash script ie. run.sh

#!/bin/bash 
   
source /opt/lampp/htdocs/memeon_data/Python-3.8.3/venv/bin/activate
python /opt/lampp/htdocs/memeon_data/Python-3.8.3/main.py

and run it in PHP with bash

shell_exec("/bin/bash /opt/lampp/htdocs/memeon_data/Python-3.8.3/run.sh 2>&1");

Or you can skip this script and you can try to use full path to python which was created inside venv/bin - and thisp python should use modules installed in venv

shell_exec("/opt/lampp/htdocs/memeon_data/Python-3.8.3/venv/bin/python /opt/lampp/htdocs/memeon_data/Python-3.8.3/main.py 2>&1");

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BTW: it should be rather 2>&1 without spaces - single & is used to run process in background and with spaces it may treats it as running in background or it can gives error as incorrect syntax.