1. 安装

Python环境：3.7.3

从PyPi下载安装：

pip install PySide2 # For the latest version on PyPi

通过http下载安装：

pip install --index-url=http://download.qt.io/snapshots/ci/pyside/5.12/latest pyside2 --trusted-host download.qt.io

2. 测试是否安装成功

import PySide2.QtCore

# Prints PySide2 version

print(PySide2.__version__)

# 5.12.2

# Gets a tuple with each version component

print(PySide2.__version_info__)

# (5, 12, 2, '', '')

# Prints the Qt version used to compile PySide2

print(PySide2.QtCore.__version__)

# 5.12.2

# Gets a tuple with each version components of Qt used to compile PySide2

print(PySide2.QtCore.__version_info__)

# (5, 12, 2)

# Print the current running Qt version number

print(PySide2.QtCore.qVersion())

# 5.12.2

3. Hello world！

import sys

import random

from PySide2 import QtCore, QtWidgets, QtGui

# Define a class named MyWidget,

# which extends QWidget and includes a QPushButton and QLabel

class MyWidget(QtWidgets.QWidget):

def __init__(self):

super().__init__()

self.hello = ["你好，世界", "Hallo Welt", "Hei maailma", "Hola Mundo", "Привет мир"]

self.button = QtWidgets.QPushButton("Click me!")

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

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

self.layout = QtWidgets.QVBoxLayout()

self.layout.addWidget(self.text)

self.layout.addWidget(self.button)

self.setLayout(self.layout)

self.button.clicked.connect(self.magic)

def magic(self):

self.text.setText(random.choice(self.hello))

if __name__ == "__main__":

app = QtWidgets.QApplication([])

widget = MyWidget()

widget.resize(800, 600)

widget.show()

sys.exit(app.exec_())