PyQt5：如何在小部件中显示回溯？

Question

我将错误显示到QPlainTextEdit或更适合的任何其他小部件中。

代码.py ：

import traceback
from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(394, 185)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.plntxt = QtWidgets.QPlainTextEdit(self.centralwidget)
        self.plntxt.setGeometry(QtCore.QRect(10, 10, 371, 131))
        self.plntxt.setObjectName("plntxt")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        self.m()
    def m(self):
        try:
            sdhfha #to create error that will be displayed to GUI
        except Exception as a:
            #I'm trying to pass the error named a into the PlainTextEdit
            self.plntxt.setPlainText(a)
            pass

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

错误是：

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\???\AppData\Local\Programs\Python\Python38\Lib\site-packages\PySide2\???...

TypeError: setPlainText(self, str): argument 1 has unexpected type 'NameError'
[Finished in 0.4s]

有任何想法吗？

Answer 1

您必须将异常转换为字符串：

def m(self):
    try:
        sdhfha
    except Exception as a:
        self.plntxt.setPlainText(str(a))

Answer 2

嘿，这也有效：

self.plntxt.append(str(a))

Answer 3

我谦虚的方法是：格式化字符串文字-> f {}

self.plntxt.setPlainText(f'{a}')