自学教程：Python3中PyQt5简单实现文件打开及保存

# -*- coding: utf-8 -*- # Form implementation generated from reading ui file 'filemanage.ui'## Created by: PyQt5 UI code generator 5.12.2## WARNING! All changes made in this file will be lost! from PyQt5 import QtCore, QtGui, QtWidgetsfrom PyQt5.QtCore import QFileInfofrom PyQt5.QtWidgets import QFileDialog  class Ui_Form(object):    save_path = ''     def setupUi(self, Form):        Form.setObjectName("Form")        Form.resize(484, 412)        self.open_path_text = QtWidgets.QLineEdit(Form)        self.open_path_text.setGeometry(QtCore.QRect(40, 20, 331, 20))        self.open_path_text.setObjectName("open_path_text")        self.open_path_but = QtWidgets.QPushButton(Form)        self.open_path_but.setGeometry(QtCore.QRect(380, 20, 75, 23))        self.open_path_but.setObjectName("open_path_but")        self.save_path_but = QtWidgets.QPushButton(Form)        self.save_path_but.setGeometry(QtCore.QRect(380, 50, 75, 23))        self.save_path_but.setObjectName("save_path_but")        self.save_path_text = QtWidgets.QLineEdit(Form)        self.save_path_text.setGeometry(QtCore.QRect(40, 50, 331, 20))        self.save_path_text.setObjectName("save_path_text")        self.text_value = QtWidgets.QTextEdit(Form)        self.text_value.setGeometry(QtCore.QRect(10, 90, 461, 281))        self.text_value.setObjectName("text_value")        self.save_but = QtWidgets.QPushButton(Form)        self.save_but.setGeometry(QtCore.QRect(190, 380, 75, 23))        self.save_but.setObjectName("save_but")         self.retranslateUi(Form)        QtCore.QMetaObject.connectSlotsByName(Form)     def retranslateUi(self, Form):        _translate = QtCore.QCoreApplication.translate        Form.setWindowTitle(_translate("Form", "Form"))        self.open_path_text.setPlaceholderText(_translate("Form", "打开地址"))        self.open_path_but.setText(_translate("Form", "浏览"))        self.save_path_but.setText(_translate("Form", "浏览"))        self.save_path_text.setPlaceholderText(_translate("Form", "保存地址"))        self.save_but.setText(_translate("Form", "保存"))        self.open_path_but.clicked.connect(self.open_event)        self.save_path_but.clicked.connect(self.save_event)        self.save_but.clicked.connect(self.save_text)     def open_event(self):        _translate = QtCore.QCoreApplication.translate        directory1 = QFileDialog.getOpenFileName(None, "选择文件", "H:/")        print(directory1)  # 打印文件夹路径        path = directory1[0]        self.open_path_text.setText(_translate("Form", path))        if path is not None:            with open(file=path, mode='r+', encoding='utf-8') as file:                self.text_value.setPlainText(file.read())     def save_event(self):        global save_path        _translate = QtCore.QCoreApplication.translate        fileName2, ok2 = QFileDialog.getSaveFileName(None, "文件保存", "H:/")        print(fileName2)  # 打印保存文件的全部路径（包括文件名和后缀名）        save_path = fileName2        self.save_path_text.setText(_translate("Form", save_path))     def save_text(self):        global save_path        if save_path is not None:            with open(file=save_path, mode='a+', encoding='utf-8') as file:                file.write(self.text_value.toPlainText())            print('已保存！')            self.text_value.clear()             '''            directory1 = QFileDialog.getExistingDirectory(self, "选择文件夹", "/")            print(directory1)  # 打印文件夹路径            text.setText(_translate("Form", directory1))            fileName, filetype = QFileDialog.getOpenFileName(self, "选择文件", "/", "All Files (*);;Text Files (*.txt)")            print(fileName, filetype)  # 打印文件全部路径（包括文件名和后缀名）和文件类型            print(fileName)  # 打印文件全部路径（包括文件名和后缀名）            text.setText(_translate("Form", fileName))            fileinfo = QFileInfo(fileName)            print(fileinfo)  # 打印与系统相关的文件信息，包括文件的名字和在文件系统中位置，文件的访问权限，是否是目录或符合链接，等等。            file_name = fileinfo.fileName()            print(file_name)  # 打印文件名和后缀名            file_suffix = fileinfo.suffix()            print(file_suffix)  # 打印文件后缀名            file_path = fileinfo.absolutePath()            print(file_path)  # 打印文件绝对路径（不包括文件名和后缀名）            files, ok1 = QFileDialog.getOpenFileNames(self, "多文件选择", "/", "所有文件 (*);;文本文件 (*.txt)")            print(files, ok1)  # 打印所选文件全部路径（包括文件名和后缀名）和文件类型            fileName2, ok2 = QFileDialog.getSaveFileName(self, "文件保存", "/", "图片文件 (*.png);;(*.jpeg)")            print(fileName2)  # 打印保存文件的全部路径（包括文件名和后缀名）            ''' if __name__ == "__main__":    import sys     app = QtWidgets.QApplication(sys.argv)    widget = QtWidgets.QWidget()    ui = Ui_Form()    ui.setupUi(widget)    widget.show()    sys.exit(app.exec_())