如何在QDialog中打印函数的输出？用pyq

Question

在pyqt的qdialog中显示函数的输出有一个问题。在

我的代码如下：

import sys
import os
import glob
import shutil
import json
import datetime
import time
import requests
from multiprocessing import Queue

start_time = time.time()

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QApplication, QMainWindow, QDialog, QPushButton, QLabel, QScrollArea, QProgressBar, QTextEdit

noreports = len(glob.glob('*.txt'))

class Dialogo(QDialog):
    def __init__(self):
        QDialog.__init__(self)
        self.resize(400, 380)
        self.nombre = QLabel(self)
        self.nombre.setGeometry(QtCore.QRect(30, 20, 171, 17))
        self.nombre.setObjectName("nombre")
        self.label = QLabel(self)
        self.label.setGeometry(QtCore.QRect(30, 50, 121, 17))
        self.label.setObjectName("label")
        self.pushButton = QPushButton(self)
        self.pushButton.setGeometry(QtCore.QRect(260, 310, 86, 28))
        self.pushButton.setObjectName("pushButton")
        self.scrollArea = QScrollArea(self)
        self.scrollArea.setGeometry(QtCore.QRect(30, 120, 341, 171))
        self.scrollArea.setWidgetResizable(True)
        self.scrollArea.setObjectName("scrollArea")
        self.scrollAreaWidgetContents = QtWidgets.QWidget()
        self.scrollAreaWidgetContents.setGeometry(QtCore.QRect(0, 0, 337, 167))
        self.scrollAreaWidgetContents.setObjectName("scrollAreaWidgetContents")
        self.scrollArea.setWidget(self.scrollAreaWidgetContents)
        self.progressBar = QProgressBar(self)
        self.progressBar.setGeometry(QtCore.QRect(30, 80, 341, 23))
        self.progressBar.setProperty("value", 0)
        self.progressBar.setObjectName("progressBar")
        self.textEdit = QTextEdit(self)
        self.scrollArea.setWidget(self.textEdit)

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

    def retranslateUi(self, Dialogo):
        global noreports
        _translate = QtCore.QCoreApplication.translate
        self.setWindowTitle(_translate("Dialog", "Process..."))
        self.label.setText(_translate("Dialog", "Files:" + str(noreports)))
        self.pushButton.setText(_translate("Dialog", "Terminate"))

class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(321, 247)
        icon = QtGui.QIcon()
        icon.addPixmap(QtGui.QPixmap("../../../../api-server/favicon.ico"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        Form.setWindowIcon(icon)
        Form.setWindowOpacity(0.98)
        Form.setProperty("sunrise", QtGui.QPixmap("../../../../api-server/ejemplo.png"))
        self.lineEdit = QtWidgets.QLineEdit(Form)
        self.lineEdit.setGeometry(QtCore.QRect(20, 130, 281, 51))
        self.lineEdit.setAutoFillBackground(True)
        self.lineEdit.setObjectName("lineEdit")
        self.DescriptLbl = QtWidgets.QLabel(Form)
        self.DescriptLbl.setGeometry(QtCore.QRect(20, 100, 281, 20))
        self.DescriptLbl.setObjectName("DescriptLbl")
        self.showinformBtn = QtWidgets.QPushButton(Form)
        self.showinformBtn.setGeometry(QtCore.QRect(30, 190, 161, 31))
        self.showinformBtn.setStyleSheet("background:rgb(110, 175, 255);\n"
"color:rgb(36, 36, 36);\n"
"border-radius:3px;\n"
"border-color:black;")
        self.showinformBtn.setObjectName("showinformBtn")
        self.dialogo = Dialogo()
        self.showinformBtn.clicked.connect(self.abrirDialogo)
        #self.showinformBtn.clicked.connect(self.showinform)
        self.CancelarBtn = QtWidgets.QPushButton(Form)
        self.CancelarBtn.setGeometry(QtCore.QRect(220, 190, 75, 31))
        self.CancelarBtn.setStyleSheet("background:rgb(226, 76, 31);\n"
"color:rgb(36, 36, 36);\n"
"border-radius:3px;\n"
"border-color:black;")
        self.CancelarBtn.setObjectName("CancelarBtn")
        self.label_2 = QtWidgets.QLabel(Form)
        self.label_2.setGeometry(QtCore.QRect(20, 220, 311, 20))
        self.label_2.setTextFormat(QtCore.Qt.RichText)
        self.label_2.setScaledContents(True)
        self.label_2.setOpenExternalLinks(True)
        self.label_2.setTextInteractionFlags(QtCore.Qt.LinksAccessibleByKeyboard|QtCore.Qt.LinksAccessibleByMouse|QtCore.Qt.TextBrowserInteraction|QtCore.Qt.TextEditable|QtCore.Qt.TextEditorInteraction|QtCore.Qt.TextSelectableByKeyboard|QtCore.Qt.TextSelectableByMouse)
        self.label_2.setObjectName("label_2")
        self.showinformLbl = QtWidgets.QLabel(Form)
        self.showinformLbl.setGeometry(QtCore.QRect(20, 30, 281, 41))
        font = QtGui.QFont()
        font.setPointSize(22)
        self.showinformLbl.setFont(font)
        self.showinformLbl.setObjectName("showinformLbl")
        self.imagen = QtWidgets.QLabel(Form)
        self.imagen.setGeometry(QtCore.QRect(-80, 0, 221, 231))
        self.imagen.setText("")
        self.imagen.setPixmap(QtGui.QPixmap("max.png"))
        self.imagen.setScaledContents(False)
        self.imagen.setIndent(-1)
        self.imagen.setTextInteractionFlags(QtCore.Qt.NoTextInteraction)
        self.imagen.setObjectName("imagen")
        self.imagen.raise_()
        self.lineEdit.raise_()
        self.DescriptLbl.raise_()
        self.showinformBtn.raise_()
        self.CancelarBtn.raise_()
        self.label_2.raise_()
        self.showinformLbl.raise_()

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

    def retranslateUi(self, Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setWindowTitle(_translate("Form", "api-server"))
        self.lineEdit.setToolTip(_translate("Form", "<html><head/><body><p>write.</p></body></html>"))
        self.lineEdit.setWhatsThis(_translate("Form", "<html><head/><body><p>write.</p></body></html>"))
        self.DescriptLbl.setText(_translate("Form", "descrip inform."))
        self.showinformBtn.setToolTip(_translate("Form", "<html><head/><body><p>Create report.</p></body></html>"))
        self.showinformBtn.setText(_translate("Form", "show inform"))
        self.CancelarBtn.setToolTip(_translate("Form", "<html><head/><body><p>Cancel.</p></body></html>"))
        self.CancelarBtn.setText(_translate("Form", "Cancel"))
        self.label_2.setText(_translate("Form", "<html><head/><body><p>Visit api-server.  ;)</p></body></html>"))
        self.showinformLbl.setText(_translate("Form", "show inform."))

    def abrirDialogo(self):
        nombreinform = self.lineEdit.text()
        self.dialogo.nombre.setText('inform:' + nombreinform)
        self.dialogo.show()
        self.showinform()

    def showinform(self):
        current_time = datetime.datetime.today().strftime("%Y-%b-%dT%H_%M")

        alle = glob.glob('*.txt')
        counterfile = noreports
        porcentotal = 0
        suma = 100/counterfile
        counterbien = 0
        for file in alle:
            porcentotal += float(suma)
            avance = round(float(porcentotal), 0)
            self.dialogo.progressBar.setProperty("value", format(avance))
            self.dialogo.textEdit.setText(file + format(avance))
            print ('{!r} %'.format(avance))
            dict = '{!r} %'.format(avance)
            f = open(file,'w')
            f.write('result = ' + repr(dict) + '\n')


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    Form = QtWidgets.QWidget()
    ui = Ui_Form()
    ui.setupUi(Form)
    Form.show()
    sys.exit(app.exec_())

代码被执行但不显示在对话框中，只显示标签而不显示进度条。在

为什么会这样？在

Answer 1

问题是您使用了format函数不好，当您有一个字符串并且希望插入具有特定格式的数据时，就会使用这个函数。在

setProperty函数要求将要分配的属性作为第一个参数，而需要该属性的类型的第二个值在您的情况下需要一个整数值，这样您就可以直接传递百分比，而无需将其更改为字符串。在

如果您读取了许多文件，这可能会阻塞绘制GUI的主线程，要解决这个问题，您必须使用QApplication.processEvents()

def showinform(self):
    current_time = datetime.datetime.today().strftime("%Y-%b-%dT%H_%M")

    alle = glob.glob('*.txt')
    counterfile = noreports
    porcentotal = 0
    suma = 100/counterfile
    counterbien = 0
    for file in alle:
        porcentotal += float(suma)
        avance = round(float(porcentotal), 0)
        self.dialogo.progressBar.setProperty("value", avance)
        self.dialogo.textEdit.append("{}{}".format(file, avance))
        print ('{!r} %'.format(avance))
        dict = '{!r} %'.format(avance)
        QApplication.processEvents()
        f = open(file,'w')
        f.write('result = ' + repr(dict) + '\n')

注意：我已经将setText函数改为QTextEdit中的append，这样它就被添加而不是被覆盖了。

您可以使用setProperty的setValue函数，而不是使用setProperty函数：

^{pr2}$

另一个建议是验证counterfile是否非零，因为它可能会为除法生成异常。