問題描述

我正在嘗試在 PyQt5 的 QplainTextEdit 小部件中顯示 python 腳本的控制臺輸出.

I am trying to display console output of a python script in a QplainTextEdit widget in PyQt5.

我收到此錯誤:

TypeError:調用元類庫時出錯元類沖突:派生類的元類必須是其所有基類的元類的(非嚴格)子類

TypeError: Error when calling the metaclass bases metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases

我已經在 pyqt GUI 文件中定義了我的對象，并且我相信我擁有所有的導入.

I have defined my objects in the pyqt GUI file and I believe that I have all the imports.

我已經修改了這個問題的代碼:

I have amended the code in this question:

from PyQt5.QtCore import QRectF, Qt
from PyQt5.QtWidgets import QFileDialog, QPlainTextEdit
from PyQt5 import QtCore, QtGui, QtWidgets
from PIL import Image, ImageQt, ImageEnhance
# from PyQt5.QtGui import Qt
from pyqtgraph.examples.text import text

from covid19gui_V3 import Ui_MainWindow
import os
import sys

input_img = Image.open("/home/ironmantis7x/Documents/Maverick_AI/Python/keras-covid-19/maverickAI30k.png")
text_edit = QPlainTextEdit()

class EmittingStream(QtCore.QObject):

    textWritten = QtCore.pyqtSignal(str)
    def write(self, text):
        self.textWritten.emit(str(text))

class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
    textWritten = QtCore.pyqtSignal(str)
    def __init__(self, parent=None, **kwargs):
        super(MainWindow, self).__init__(parent)
        self.setupUi(self)
        self.ShowIButton.clicked.connect(self.do_test)
        self.chooseStudy.clicked.connect(self.do_choosestudy)
        self.RunButton_3.clicked.connect(self.do_runstudy)
        self.scene = QtWidgets.QGraphicsScene(self)
        self.graphicsView.setScene(self.scene)
        w, h = input_img.size
        self.pixmap_item = self.scene.addPixmap(QtGui.QPixmap())
        # self.graphicsView.fitInView(QRectF(0, 0, w, h), Qt.KeepAspectRatio)
        self.graphicsView.update()
        self.plainTextEdit.update()
        self.level = 1
        self.enhancer = None
        self.timer = QtCore.QTimer(interval=500, timeout=self.on_timeout)
        sys.stdout = EmittingStream(textWritten=self.normalOutputWritten)

    def write(self, text):
        self.textWritten.emit(str(text))

    @QtCore.pyqtSlot()
    def do_test(self):
        # input_img = Image.open("/home/ironmantis7x/Documents/Maverick_AI/Python/keras-covid-19/maverickAI30k.png")
        self.enhancer = ImageEnhance.Brightness(input_img)
        self.timer.start()
        self.ShowIButton.setDisabled(True)

    @QtCore.pyqtSlot()
    def on_timeout(self):
        if self.enhancer is not None:
            result_img = self.enhancer.enhance(self.level)
            qimage = ImageQt.ImageQt(result_img)
            self.pixmap_item.setPixmap(QtGui.QPixmap.fromImage(qimage))
        if self.level > 7:
            self.timer.stop()
            self.enhancer = None
            self.level = 0
            self.ShowIButton.setDisabled(False)
        self.level = 1
        self.ShowIButton.setDisabled(False)

    @QtCore.pyqtSlot()
    def do_choosestudy(self):
        dlg = QFileDialog()
        dlg.setFileMode(QFileDialog.AnyFile)
        if dlg.exec_():
            filenames = dlg.selectedFiles()
            f = open(filenames[0], 'r')

    @QtCore.pyqtSlot()
    def do_runstudy(self):
        os.system("df -h")
        # filetext = open('screenout.txt').read()
        # filetext.close()
        # textViewValue = self.plainTextEdit.toPlainText()
        # QPlainTextEdit.appendPlainText(self, str(textViewValue))
        # sys.stdout = self(textWritten=self.textWritten)
        self.normalOutputWritten(text_edit)

    def __del__(self):
        # Restore sys.stdout
        sys.stdout = sys.__stdout__

    def normalOutputWritten(self, text_edit):
        #cursor = self.plainTextEdit.textCursor()
        #cursor.movePosition(QtGui.QTextCursor.End)
        #cursor.insertText(text_edit)
        self.plainTextEdit.appendPlainText(text_edit)
        #self.plainTextEdit.ensureCursorVisible()

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())

我怎樣才能使它正常工作?

How can I make this work correctly?

我確實對該主題進行了研究，這是我在發布問題之前用來嘗試解決問題的主要資源之一:如何捕獲 Python 解釋器的輸出并顯示在 Text 小部件中?

I indeed DID do research into the topic and this is one of the main resources I used to try to solve the issue before I posted my question: How to capture output of Python's interpreter and show in a Text widget?

我在帖子中修改了我的代碼，以反映我用來幫助我解決問題的鏈接中的代碼建議.

I have revised my code in the post to reflect code suggestions in the link I used to help me with my issue.

我仍然無法讓它正確運行.我現在收到此錯誤:

I am still unable to get this to run correctly. I now get this error:

self.plainTextEdit.appendPlainText(text_edit) 類型錯誤:appendPlainText(self, str):參數 1 具有意外類型'QPlainTextEdit'

self.plainTextEdit.appendPlainText(text_edit) TypeError: appendPlainText(self, str): argument 1 has unexpected type 'QPlainTextEdit'

推薦答案

我有一個用戶界面，TableManagerWindow，我一直在 Qt 設計器中維護和開發.通過 pyuic 轉換為 *.py 文件后，我能夠實現您在上面提供的鏈接中提出的 Ferdinand Beyer 的建議.將文本打印到終端的簡單按鈕，它確實通過 append() 附加到 QTextEdit 小部件.由于某種原因，不確定這是否適合您，但我可以保證它也對我有用.我不夠精明，無法了解導致您的問題的細微差別，但我想我會把它放在這里以防萬一.如果它無關緊要，管理員可以隨意刪除它，但它確實有效.

I have a user interface, TableManagerWindow, that I've been maintaining and developing in Qt designer. After converting via pyuic to a *.py file, I was able to implement what Ferdinand Beyer had suggested in the link you provided above. Simple button to print text to terminal and it indeed does get appended to the QTextEdit widget via append(). Not sure this fits the bill for you for some reason, but I can vouch that it worked for me as well. I'm not savvy enough to get the nuance that is causing your issue, but figured I'd put this here just in case. Admins feel free to delete this if it's extraneous, but it works.

import sys
from PyQt5 import QtCore, QtGui, QtWidgets

# Define a stream, custom class, that reports data written to it, with a Qt signal
class EmittingStream(QtCore.QObject):

    textWritten = QtCore.pyqtSignal(str)

    def write(self, text):
        self.textWritten.emit(str(text))

class Ui_TableManagerWindow(object):
    def setupUi(self, TableManagerWindow):
        #define all of my widgets, layout, etc here
        .
        .
        .
        # Install a custom output stream by connecting sys.stdout to instance of EmmittingStream.
        sys.stdout = EmittingStream(textWritten=self.output_terminal_written)

        # Create my signal/connections for custom method
        self.source_dir_button.clicked.connect(self.sourceDirButtonClicked)

        self.retranslateUi(TableManagerWindow)
        QtCore.QMetaObject.connectSlotsByName(TableManagerWindow)


    def retranslateUi(self, TableManagerWindow):
        .
        .
        .

    #custom method that prints to output terminal.  The point is to have this emmitted out to my QTextEdit widget.
    def sourceDirButtonClicked(self):
        for i in range(10):
            print("The Source DIR button has been clicked " + str(i) + " times")

    #custom method to write anything printed out to console/terminal to my QTextEdit widget via append function.
    def output_terminal_written(self, text):
        self.output_terminal_textEdit.append(text)

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

這篇關于如何使用 Python 將控制臺輸出定向到 pyqt5 plainTextEdit 小部件?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！