在代码输入栏写上如下代码:

import sys

import random

from PySide2 import QtCore, QtWidgets, QtGui

class MyWidget(QtWidgets.QWidget):

def __init__(self):

super().__init__()

self.text = QtWidgets.QLabel("Hello World")

self.text.setAlignment(QtCore.Qt.AlignCenter)

self.layout = QtWidgets.QVBoxLayout()

self.layout.addWidget(self.text)

self.setLayout(self.layout)

if __name__ == "__main__":

app = QtWidgets.QApplication([])

widget = MyWidget()

widget.resize(400, 300)

widget.show()

sys.exit(app.exec_())

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