PyQt5와 PyQt6가 달라진점(21년 5월 업데이트)

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QLabel
from PyQt5.QtGui import QIcon
from PyQt5.QtCore import pyqtSlot

def helloworld():
   app = QApplication(sys.argv)
   widget = QWidget()

   textLabel = QLabel(widget)
   textLabel.setText("Hello World!")
   textLabel.move(150, 200)

   widget.setGeometry(50, 50, 400, 400)
   widget.setWindowTitle("PyQt5 Example")
   widget.show()
   sys.exit(app.exec_())

프로그램무한반복 = QApplication(sys.argv)
실행인스턴스 = helloworld()
프로그램무한반복.exec_()

import sys
from PyQt6.QtWidgets import QApplication, QWidget, QLabel
from PyQt6.QtGui import QIcon
from PyQt6.QtCore import pyqtSlot

def helloworld():
   app = QApplication(sys.argv)
   widget = QWidget()

   textLabel = QLabel(widget)
   textLabel.setText("Hello World!")
   textLabel.move(150, 200)

   widget.setGeometry(50, 50, 400, 400)
   widget.setWindowTitle("PyQt5 Example")
   widget.show()
   sys.exit(app.exec())

프로그램무한반복 = QApplication(sys.argv)
실행인스턴스 = helloworld()
프로그램무한반복.exec()

1. exec_()가 exec()가 되었습니다.

2. PyQt5가 PyQt6가 되었습니다.

Differences Between PyQt6 and PyQt5 - PyQt v6.1 Reference Guide

In this section we give an overview of the differences between PyQt6 and PyQt5. This is not an exhaustive list and does not go into the detail of the differences between the Qt v6 and Qt v5 APIs. All named enums are now implemented as a sub-class of the standard Python class.

https://www.riverbankcomputing.com/static/Docs/PyQt6/pyqt5_differences.html

• All named enums are now implemented as a sub-class of the standard Python Enum class. (PyQt5 used IntEnum for scoped enums and a custom type for traditional named enums).

• Qt provides the QFlags template class as a type-safe way of using enum values that can be combined as a set of flags. The name of the class is often the plural form of the name of the enum. PyQt5 implements both of these as separate types. PyQt6 instead combines them as a single type, using the name of the enum, as a sub-class of Flag.

• Q_CLASSINFO() has been replaced by the pyqtClassInfo() class decorator.

• Q_ENUM(), Q_ENUMS(), Q_FLAG() and Q_FLAGS() have been replaced by the pyqtEnum() class decorator.

• All exec_() and print_() methods have been removed.

• qApp has been removed.

• The PYQT_CONFIGURATION dict has been removed.

• The Qt module has been removed.

• The bindings for the (GPL licensed) Qt classes that implement support for network authorisation have moved out to a separate add-on project PyQt6-NetworkAuth. This means that all of the libraries wrapped by PyQt6 itself are licensed under the LGPL.

• pylupdate6 is a completely new pure-Python implementation. It can no longer read a .pro file in order to determine the names of .py files to translate.

• Support for Qt’s resource system has been removed (i.e. there is no pyrcc6).

• Python v3.6.1 or later is required.

Qt - PyQt v6.1 Reference Guide

AlignmentFlag This enum type is used to describe alignment. It contains horizontal and vertical flags that can be combined to produce the required effect. The TextElideMode enum can also be used in many situations to fine-tune the appearance of aligned text.

https://www.riverbankcomputing.com/static/Docs/PyQt6/api/qtcore/qt.html

if event.button() == Qt.RightButton:
    print('마우스 오른쪽 버튼을 클릭하셨어요.')

if event.button() == Qt.MouseButtons.RightButton:
    print('마우스 오른쪽 버튼을 클릭하셨어요.')

import sys

from PySide6.QtWidgets import QApplication, QWidget, QPushButton, QMessageBox
from PySide6.QtGui import QCloseEvent


class ExampleWindow(QWidget):
    def __init__(self):
        super().__init__()
        self.setup()

    def setup(self):
        btn_quit = QPushButton('Force Quit', self)
        btn_quit.clicked.connect(QApplication.instance().quit)
        btn_quit.resize(btn_quit.sizeHint())
        btn_quit.move(90, 100)

        self.setGeometry(100, 100, 200, 150)
        self.setWindowTitle('Window Example')

        self.show()

    def closeEvent(self, event: QCloseEvent):
        reply = QMessageBox.question(self, 'Message', 'Are you sure you want to quit?',
                                     QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
        if reply == QMessageBox.Yes:
            event.accept()
        else:
            event.ignore()


def run():
    app = QApplication(sys.argv)
    ex = ExampleWindow()
    sys.exit(app.exec())


if __name__ == '__main__':
    run()