PyQt getsavefilename取消保存时显示错误“ Python已停止工作”

Question

I have a problem with pyqt5 getsavefilename when saving a file from a textedit.

When I am saving a file it is working there is no problem but when I want to close the save dialog without saving it is giving me error:

python has stopped working

I'am using python 3.6

Code

def fileSave(self):
    filename = QFileDialog.getSaveFileName(self, 'Save A File', '/home')

    with open(filename[0], 'w') as f:
        text = self.textEdit.toPlainText()
        f.write(text)
        f.close()

Error screenshot

Answer 1

When you cancel the QFileDialog it returns as an empty text, and when you want to open a file with a non-existent name, it generates that error. Also if you are using with to open the file it is not necessary to close the file, just quit the with it will be closed automatically

def fileSave(self):
    filename, _ = QFileDialog.getSaveFileName(self, 'Save A File', '/home')

    if filename != "":
        with open(filename, 'w') as f:
            text = self.textEdit.toPlainText()
            f.write(text)

Update:

from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtPrintSupport import *

class Widget(QWidget):
    def __init__(self, *args, **kwargs):
        QWidget.__init__(self, *args, **kwargs)
        lay = QVBoxLayout(self)
        self.textEdit = QTextEdit()
        self.button = QPushButton("Print")
        lay.addWidget(self.textEdit)
        lay.addWidget(self.button)

        self.button.clicked.connect(self.filePrintPdf)

    def filePrintPdf(self): 
        fn, _ = QFileDialog.getSaveFileName(self, "Export PDF", None, "PDF files (.pdf);;All Files ()") 
        if fn != "": 
            if QFileInfo(fn).suffix() == "": fn += '.pdf' 
        printer = QPrinter(QPrinter.HighResolution) 
        printer.setOutputFormat(QPrinter.PdfFormat) 
        printer.setOutputFileName(fn) 
        self.textEdit.document().print_(printer)

if __name__ == '__main__':
    import sys

    app = QApplication(sys.argv)
    w = Widget()
    w.show()
    sys.exit(app.exec_())