How to call a Python script in Qt?

2 years ago
Olivia Parker
1 minute

To call a Python script in Qt, you can use the QProcess class. Here is a simple example.

#include <QCoreApplication>
#include <QProcess>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QProcess process;
    process.start("python", QStringList() << "path_to_script.py");

    if (process.waitForFinished()) {
        QByteArray output = process.readAll();
        qDebug() << output;
    } else {
        qDebug() << "Failed to run Python script";
    }

    return a.exec();
}

In the example above, a process object is created using the QProcess class and the start() function is used to specify the Python script and parameters to execute. Finally, the waitForFinished() function is used to wait for the script to finish executing and the readAll() function is used to obtain the script’s output.

Please note that you need to replace “python” with the path to the Python executable file on your system, and replace “path_to_script.py” with the path to the Python script you want to execute.

In addition, Qt also offers many other features related to process communication, such as input and output redirection, interacting with processes, etc. You can further extend and customize according to your own needs.

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