qt-creator/doc/src/python/creator-python-project.qdocinc

/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Creator documentation.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Free Documentation License Usage
** Alternatively, this file may be used under the terms of the GNU Free
** Documentation License version 1.3 as published by the Free Software
** Foundation and appearing in the file included in the packaging of
** this file. Please review the following information to ensure
** the GNU Free Documentation License version 1.3 requirements
** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
**
****************************************************************************/

/*!
//! [python project wizards]

    \section2 Creating Qt for Python Applications

    \l {https://doc.qt.io/qtforpython/index.html}{Qt for Python} enables you
    to use Qt 5 API in Python applications. You can use the PySide2 module to
    gain access to individual Qt modules, such as \l {Qt Core}, \l {Qt GUI},
    and \l {Qt Widgets}.

    The Qt for Python Application wizards generate a \c {.pyproject} file that
    lists the files in the Python project and a \c {.py} file that contains
    some boilerplate code.

    The \c{.pyproject} files are JSON-based configuration files that replace
    the previously used \c {.pyqtc} configuration files. You can still open and
    use \c {.pyqtc} files, but we recommend that you choose \c{.pyproject} files
    for new projects.

    The Window wizard adds the following imports to the \c {main.py}
    file to provide access to the QApplication and QMainWindow classes
    in the Qt Widgets module:

    \badcode
    import sys
    from PySide2.QtWidgets import QApplication, QMainWindow
    \endcode

    The Window wizard also adds a \c MainWindow class that inherits from
    QMainWindow:

    \badcode
    class MainWindow(QMainWindow):
        def __init__(self):
        QMainWindow.__init__(self)
    \endcode

    Next, the Window wizard adds a main function, where it creates a
    QApplication instance. As Qt can receive arguments from the command line,
    you can pass any arguments to the QApplication object. Usually, you do not
    need to pass any arguments, and you can use the following approach:

    \badcode
    if __name__ == "__main__":
        app = QApplication([])
        ...
    \endcode

    Next, the Window wizard instantiates the \c MainWindow class and shows it:

    \badcode
        window = MainWindow()
        window.show()
        ...
    \endcode

    Finally, the Window wizard calls the \c app.exec_() method to enter the Qt
    main loop and start executing the Qt code:

    \badcode
        sys.exit(app.exec_())
    \endcode

    The Empty wizard adds similar code to the \c {main.py} file, but it does
    not add any classes, so you need to add and instantiate them yourself.

    For examples of creating Qt for Python applications, see
    \l {https://doc.qt.io/qtforpython/tutorials/index.html}
    {Qt for Python Examples and Tutorials}.

//! [python project wizards]
*/