Question

我在小程序中将两个函数相互连接有问题。我正在使用PyQt5和PyPDF2模块。我想将两个pdf文件链接到一个。在我的程序中，我有3个按钮：

btnPlik1 - 浏览第一个文件（连接到函数openFile1）
btnPlik2 - 浏览第二个文件（连接到openFile2函数）
btnPlik3 - 'start' - 运行程序（连接到函数laczeniePdf）

函数单独工作但是当我想通过单击“开始”（btnPlik3）连接它们时，我的程序崩溃了。以下是我的代码：

def openFile1(self):
    pathFileName, _ = QtWidgets.QFileDialog.getOpenFileName(None, 'Wybierz plik', '', 'pdf(*.pdf)')
    print("PathFileName-'{}', \n_-'{}'".format(pathFileName, _))
    if pathFileName:
        print("Wybrany plik: ", pathFileName)
        g = open(pathFileName, 'rb')
        return g

def openFile2(self):
    pathFileName, _ = QtWidgets.QFileDialog.getOpenFileName(None, 'Wybierz plik', '', 'pdf(*.pdf)')
    print("PathFileName-'{}', \n_-'{}'".format(pathFileName, _))
    if pathFileName:
        print("Wybrany plik: ", pathFileName)
        h = open(pathFileName, 'rb')
        return h

def laczeniePdf(self,g, h):
    readerLinkPage1 = PyPDF2.PdfFileReader(open(g, 'rb'))
    readerLinkPage2 = PyPDF2.PdfFileReader(open(h, 'rb'))
    writerLinkPage = PyPDF2.PdfFileWriter()

    OutputFile = open('FinalOutput.pdf', 'wb')
    writerLinkPage.appendPagesFromReader(readerLinkPage1)
    writerLinkPage.appendPagesFromReader(readerLinkPage2)
    writerLinkPage.write(OutputFile)
    OutputFile.close()

我期待你的提示和建议

编辑：

Here is code of class we are talking about(it is separate window in my program)

class Ui_PolaczPliki(object):
    def setupUi(self, PolaczPliki):
        PolaczPliki.setObjectName("PolaczPliki")
        PolaczPliki.resize(295, 113)
        self.btnPlik1 = QtWidgets.QPushButton(PolaczPliki)
        self.btnPlik1.setGeometry(QtCore.QRect(30, 40, 91, 41))
        self.btnPlik1.setObjectName("btnPlik1")
        self.btnPlik1.clicked.connect(self.openFile1)
        self.btnPlik2 = QtWidgets.QPushButton(PolaczPliki)
        self.btnPlik2.setGeometry(QtCore.QRect(160, 40, 91, 41))
        self.btnPlik2.setObjectName("btnPlik2")
        self.btnPlik2.clicked.connect(self.openFile2)
        self.btnPlik3 = QtWidgets.QPushButton(PolaczPliki)
        self.btnPlik3.setGeometry(QtCore.QRect(80, 80, 40, 20))
        self.btnPlik3.setObjectName("btnPlik3")
        self.btnPlik3.clicked.connect(self.laczeniePdf)
        self.label = QtWidgets.QLabel(PolaczPliki)
        self.label.setGeometry(QtCore.QRect(50, 10, 47, 13))
        self.label.setObjectName("label")
        self.label_2 = QtWidgets.QLabel(PolaczPliki)
        self.label_2.setGeometry(QtCore.QRect(180, 10, 47, 13))
        self.label_2.setObjectName("label_2")

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

    def retranslateUi(self, PolaczPliki):
        _translate = QtCore.QCoreApplication.translate
        PolaczPliki.setWindowTitle(_translate("PolaczPliki", "Polacz pliki"))
        self.btnPlik1.setText(_translate("PolaczPliki", "Dodaj"))
        self.btnPlik2.setText(_translate("PolaczPliki", "Dodaj"))
        self.btnPlik3.setText(_translate("PolaczPliki", "Start"))
        self.label.setText(_translate("PolaczPliki", "Plik nr 1"))
        self.label_2.setText(_translate("PolaczPliki", "Plik nr 2"))

    def openFile1(self):
        pathFileName, _ = QtWidgets.QFileDialog.getOpenFileName(None, 'Wybierz plik', '', 'pdf(*.pdf)')
        print("PathFileName-'{}', \n_-'{}'".format(pathFileName, _))
        if pathFileName:
            print("Wybrany plik: ", pathFileName)
            g = open(pathFileName, 'rb')
            return g

    def openFile2(self):
        pathFileName, _ = QtWidgets.QFileDialog.getOpenFileName(None, 'Wybierz plik', '', 'pdf(*.pdf)')
        print("PathFileName-'{}', \n_-'{}'".format(pathFileName, _))
        if pathFileName:
            print("Wybrany plik: ", pathFileName)
            h = open(pathFileName, 'rb')
            return h

    def laczeniePdf(self, g,h):
        readerLinkPage1 = PyPDF2.PdfFileReader(g)
        readerLinkPage2 = PyPDF2.PdfFileReader(h)
        writerLinkPage = PyPDF2.PdfFileWriter()

        OutputFile = open('FinalOutput.pdf', 'wb')
        writerLinkPage.appendPagesFromReader(readerLinkPage1)
        writerLinkPage.appendPagesFromReader(readerLinkPage2)
        writerLinkPage.write(OutputFile)
        OutputFile.close()

if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    ex = Ui_MainWindow()
    w = QtWidgets.QMainWindow()
    ex.setupUi(w)
    w.show()
    sys.exit(app.exec_())

Answer 1

试一试：

import sys
from   PyQt5 import QtCore, QtGui, QtWidgets
import PyPDF2

class Ui_PolaczPliki(object):
    def __init__(self):                     # +++
        self.file_1 = None                  # +++
        self.file_2 = None                  # +++

    def setupUi(self, PolaczPliki):
        PolaczPliki.setObjectName("PolaczPliki")
        PolaczPliki.resize(600, 150)

        self.btnPlik1 = QtWidgets.QPushButton(PolaczPliki)
        self.btnPlik1.setGeometry(QtCore.QRect(30, 40, 91, 41))
        self.btnPlik1.setObjectName("btnPlik1")
        self.btnPlik1.clicked.connect(self.openFile1)

        self.btnPlik2 = QtWidgets.QPushButton(PolaczPliki)
        self.btnPlik2.setGeometry(QtCore.QRect(300, 40, 91, 41))
        self.btnPlik2.setObjectName("btnPlik2")
        self.btnPlik2.clicked.connect(self.openFile2)

        self.btnPlik3 = QtWidgets.QPushButton(PolaczPliki)
        self.btnPlik3.setGeometry(QtCore.QRect(165, 90, 91, 41))
        self.btnPlik3.setObjectName("btnPlik3")

        self.btnPlik3.clicked.connect(lambda: self.laczeniePdf(self.file_1, self.file_2)) # +++

        self.label = QtWidgets.QLabel(PolaczPliki)
        self.label.setGeometry(QtCore.QRect(30, 10, 47, 13))
        self.label.setObjectName("label")

        self.label_2 = QtWidgets.QLabel(PolaczPliki)
        self.label_2.setGeometry(QtCore.QRect(300, 10, 47, 13))
        self.label_2.setObjectName("label_2")

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

    def retranslateUi(self, PolaczPliki):
        _translate = QtCore.QCoreApplication.translate
        PolaczPliki.setWindowTitle(_translate("PolaczPliki", "Polacz pliki"))
        self.btnPlik1.setText(_translate("PolaczPliki", "Dodaj Plik nr 1"))
        self.btnPlik2.setText(_translate("PolaczPliki", "Dodaj Plik nr 2"))
        self.btnPlik3.setText(_translate("PolaczPliki", "Start"))
        self.label.setText(_translate("PolaczPliki", "Plik nr 1"))
        self.label_2.setText(_translate("PolaczPliki", "Plik nr 2"))

    def openFile1(self):
        pathFileName, _ = QtWidgets.QFileDialog.getOpenFileName(None, 'Wybierz plik', '', 'pdf(*.pdf)')
        print("PathFileName-'{}', \n_-'{}'".format(pathFileName, _))
        if pathFileName:
            print("\nWybrany plik: ", pathFileName)
            self.file_1 = pathFileName                        # +++
            self.label.setText("{}".format(self.file_1))      # +++
            self.label.adjustSize()                           # +++
            #g = open(pathFileName, 'rb')
            #print("\ng = open(pathFileName, 'rb') =`{}`, \ntype g =`{}` ".format(g, type(g)))
            #return g

    def openFile2(self):
        pathFileName, _ = QtWidgets.QFileDialog.getOpenFileName(None, 'Wybierz plik', '', 'pdf(*.pdf)')
        print("PathFileName-'{}', \n_-'{}'".format(pathFileName, _))
        if pathFileName:
            print("\nWybrany plik: ", pathFileName)
            self.file_2 = pathFileName                        # +++
            self.label_2.setText("{}".format(self.file_2))    # +++ 
            self.label_2.adjustSize()                         # +++
            #h = open(pathFileName, 'rb')
            #print("\nh = open(pathFileName, 'rb') =`{}`, \ntype h =`{}` ".format(h, type(h)))
            #return h

    def laczeniePdf(self, file_1, file_2):                    # +++
        g = open(file_1, 'rb')                                # +++
        h = open(file_2, 'rb')                                # +++
        readerLinkPage1 = PyPDF2.PdfFileReader(g)
        readerLinkPage2 = PyPDF2.PdfFileReader(h)
        writerLinkPage  = PyPDF2.PdfFileWriter()

        OutputFile = open('FinalOutput.pdf', 'wb')
        writerLinkPage.appendPagesFromReader(readerLinkPage1)
        writerLinkPage.appendPagesFromReader(readerLinkPage2)
        writerLinkPage.write(OutputFile)
        OutputFile.close() 
        print("\n g=`{}`  +  h=`{}` !!!".format(file_1, file_2))        


if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    ex = Ui_PolaczPliki()                    #Ui_MainWindow()  # +++
    w = QtWidgets.QMainWindow()
    ex.setupUi(w)
    w.show()
    sys.exit(app.exec_())

如何在python中正确连接两个函数？

1 个答案: