Python3中PyQt5简单实现文件打开及保存

本文主要介绍了Python3中PyQt5简单实现文件打开及保存，分享给大家，具体如下：

# -*- 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, QtWidgets
from PyQt5.QtCore import QFileInfo
from 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_())

来源：https://blog.csdn.net/u013032852/article/details/93996214