PyQt5 +python3.6+qt designer弄个按钮事件

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(200, 60, 361, 71))
        self.pushButton.setObjectName("pushButton")
        self.textEdit = QtWidgets.QTextEdit(self.centralwidget)
        self.textEdit.setGeometry(QtCore.QRect(190, 200, 401, 261))
        self.textEdit.setObjectName("textEdit")
        MainWindow.setCentralWidget(self.centralwidget)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        self.pushButton.clicked.connect(MainWindow.hello)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton.setText(_translate("MainWindow", "helloworld"))

以上是form.py

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from PyQt5 import QtWidgets
import sys

from form import Ui_MainWindow  

class mywindow(QtWidgets.QMainWindow,Ui_MainWindow):
    def __init__(self):
        super(mywindow,self).__init__()
        self.setupUi(self)

    #定义槽函数
    def hello(self):
        self.textEdit.setText("hello world")

app = QtWidgets.QApplication(sys.argv)
#MainWindow = QMainWindow()
window = mywindow()
window.show()
sys.exit(app.exec_())

这是test.py

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一个小小button事件程序就实现好了。