验证pyqt5是否安装成功

1. 新建一个***.py文件，将一下代码写入文件中保存，双击运行弹出如下图所示widget界面说明安装成功

import sys
from PyQt5 import QtWidgets, QtCore

app = QtWidgets.QApplication(sys.argv)
widget = QtWidgets.QWidget()
widget.resize(360, 360)
widget.setWindowTitle("Hello, PyQt5!")
widget.show()
sys.exit(app.exec_())

2.第一个pyqt5程序

• 主程序

from PyQt5 import QtWidgets   # 导入PyQt5部件
import sys,login

if __name__=="__main__":
    app = QtWidgets.QApplication(sys.argv)
    widget = QtWidgets.QWidget()
    ui = login.Ui_Form()
    ui.setupUi(widget)
    widget.show()
    sys.exit(app.exec_())

• 界面程序login.py(通过ui程序->Pyuic转换而成)

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'first.ui'
#
# Created by: PyQt5 UI code generator 5.12.1
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(327, 245)
        self.gridLayout_3 = QtWidgets.QGridLayout(Form)
        self.gridLayout_3.setObjectName("gridLayout_3")
        self.frame_2 = QtWidgets.QFrame(Form)
        self.frame_2.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.frame_2.setFrameShadow(QtWidgets.QFrame.Raised)
        self.frame_2.setObjectName("frame_2")
        self.gridLayout_2 = QtWidgets.QGridLayout(self.frame_2)
        self.gridLayout_2.setObjectName("gridLayout_2")
        self.frame = QtWidgets.QFrame(self.frame_2)
        self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
        self.frame.setObjectName("frame")
        self.gridLayout = QtWidgets.QGridLayout(self.frame)
        self.gridLayout.setObjectName("gridLayout")
        self.label = QtWidgets.QLabel(self.frame)
        self.label.setObjectName("label")
        self.gridLayout.addWidget(self.label, 0, 0, 1, 1)
        self.lineEdit = QtWidgets.QLineEdit(self.frame)
        self.lineEdit.setObjectName("lineEdit")
        self.gridLayout.addWidget(self.lineEdit, 0, 1, 1, 1)
        self.label_2 = QtWidgets.QLabel(self.frame)
        self.label_2.setObjectName("label_2")
        self.gridLayout.addWidget(self.label_2, 1, 0, 1, 1)
        self.lineEdit_2 = QtWidgets.QLineEdit(self.frame)
        self.lineEdit_2.setObjectName("lineEdit_2")
        self.gridLayout.addWidget(self.lineEdit_2, 1, 1, 1, 1)
        self.gridLayout_2.addWidget(self.frame, 0, 0, 1, 2)
        self.checkBox = QtWidgets.QCheckBox(self.frame_2)
        self.checkBox.setObjectName("checkBox")
        self.gridLayout_2.addWidget(self.checkBox, 1, 0, 1, 2)
        self.pushButton = QtWidgets.QPushButton(self.frame_2)
        self.pushButton.setObjectName("pushButton")
        self.gridLayout_2.addWidget(self.pushButton, 2, 0, 1, 1)
        self.pushButton_2 = QtWidgets.QPushButton(self.frame_2)
        self.pushButton_2.setObjectName("pushButton_2")
        self.gridLayout_2.addWidget(self.pushButton_2, 2, 1, 1, 1)
        self.gridLayout_3.addWidget(self.frame_2, 0, 0, 1, 1)

        self.retranslateUi(Form)
        QtCore.QMetaObject.connectSlotsByName(Form)

    def retranslateUi(self, Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setWindowTitle(_translate("Form", "Form"))
        self.label.setText(_translate("Form", "用户名："))
        self.label_2.setText(_translate("Form", "密码："))
        self.checkBox.setText(_translate("Form", "记住用户名和密码"))
        self.pushButton.setText(_translate("Form", "取消"))
        self.pushButton_2.setText(_translate("Form", "确定"))