我创建了一个应用程序，只需将两个值相加即可。我的目标是将这两个值保存到一个文件中，以便稍后可以重新插入它们。现在我只能让它保存一个值，我也可以重新打开保存它的文件并将该值插入回去。
from PyQt5 import QtWidgets, uic
from PyQt5.QtWidgets import QPushButton
class MyWindow(QtWidgets.QMainWindow, QPushButton):
def __init__(self):
super(MyWindow, self).__init__()
uic.loadUi('File_Stuff.ui', self)
self.setWindowTitle("File Stuff")
self.Add.clicked.connect(self.Math)
openFile = QtWidgets.QAction("&Open File", self)
openFile.setShortcut("Ctrl+O")
openFile.triggered.connect(self.file_open)
saveFile = QtWidgets.QAction("&Save File", self)
saveFile.setShortcut("Ctrl+S")
saveFile.triggered.connect(self.file_save)
mainMenu = self.menuBar()
fileMenu = mainMenu.addMenu('&File')
fileMenu.addAction(openFile)
fileMenu.addAction(saveFile)
def Math(self):
a = self.LE1.text()
b = self.LE2.text()
answer = float(a) + float(b)
answer2 = str(answer)
self.TE.setText(answer2)
def file_open(self):
name = QtWidgets.QFileDialog.getOpenFileName(self, 'Select File')
file = open(name[0], 'r')
with file:
text = file.read()
self.LE1.setText(text)
# if I put self.LE2.setText(text), it inserts both values into both Line Edits
def file_save(self):
name = QtWidgets.QFileDialog.getSaveFileName(self, 'Select File')
file = open(name[0], 'w')
text = self.LE1.text()
file.write(text)
file.close()
# if I put text2 = self.LE2.text() and file.write(text2), it saves them together
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
window = MyWindow()
window.show()
sys.exit(app.exec_())
当我重新打开保存这两个值的文件时，我无法分别调用这两个值。
最佳答案
尝试一下:
from PyQt5 import QtWidgets, uic
from PyQt5.QtWidgets import QPushButton, QWidget, QLineEdit, QTextEdit, QGridLayout
class MyWindow(QtWidgets.QMainWindow, QPushButton):
def __init__(self):
super(MyWindow, self).__init__()
# uic.loadUi('File_Stuff.ui', self)
centralWidget = QWidget()
self.setCentralWidget(centralWidget)
self.Add = QPushButton("Add")
self.LE1 = QLineEdit()
self.LE2 = QLineEdit()
self.TE = QTextEdit()
self.setWindowTitle("File Stuff")
self.Add.clicked.connect(self.Math)
openFile = QtWidgets.QAction("&Open File", self)
openFile.setShortcut("Ctrl+O")
openFile.triggered.connect(self.file_open)
saveFile = QtWidgets.QAction("&Save File", self)
saveFile.setShortcut("Ctrl+S")
saveFile.triggered.connect(self.file_save)
mainMenu = self.menuBar()
fileMenu = mainMenu.addMenu('&File')
fileMenu.addAction(openFile)
fileMenu.addAction(saveFile)
layout = QGridLayout(centralWidget)
layout.addWidget(self.LE1)
layout.addWidget(self.LE2)
layout.addWidget(self.TE)
layout.addWidget(self.Add)
def Math(self):
a = self.LE1.text()
b = self.LE2.text()
answer = float(a) + float(b)
answer2 = str(answer)
self.TE.setText(answer2)
def file_open(self):
name = QtWidgets.QFileDialog.getOpenFileName(self, 'Select File')
file = open(name[0], 'r')
with file:
# text = file.read()
myList = file.read().split() # <---
self.LE1.setText(myList[0]) # <---
self.LE2.setText(myList[1]) # <---
# if I put self.LE2.setText(text), it inserts both values into both Line Edits
def file_save(self):
name = QtWidgets.QFileDialog.getSaveFileName(self, 'Select File')
file = open(name[0], 'w')
text = "{}\n{}".format(self.LE1.text(), self.LE2.text()) # <---
file.write(text)
file.close()
# if I put text2 = self.LE2.text() and file.write(text2), it saves them together
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
window = MyWindow()
window.show()
sys.exit(app.exec_())
关于python - 如何保存各个值并重新打开它们以供以后使用？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/56840960/