Python-02 PDF文件合成小工具
工具目的：有些公司受软件版权限制，只要PDF阅读器无法编辑合成PDF文件。在缺乏PDF编辑器的条件下，将两个PDF文件打包并合成新命名为一个PDF文件。
功能介绍：
1.点击按钮“第一个文件”选择需要合并的第一个PDF文件。
2.点击按钮“第二个文件”选择需要合并的第二个PDF文件。
3.在New File Name后输入新合成的PDF文件名字。
4.点击按钮“合成文件”打开将第一个PDF文件和第二个PDF文件合成并命名为步骤3的新PDF文件。
实现该功能主要运行PyPDF2第三方库中的PdfFileReader、PdfFileMerger两个函数功能。步骤4，为了点击按钮打开显示PDF文件，运用了os.startfile(filename)函数，笔者刚开始的时候在这里曾使用os.system(filename)和os.popen(filenam)运行后打开PDF文件都比较慢而且容易出现程序卡顿等现象。
主功能PDFCombi.py函数：
if __name__ == "__main__":
app = QApplication(sys.argv)
app.setStyle(QStyleFactory.create("Windows"))
Win_PDF = PDFMain()
Win_PDF.show()
sys.exit(app.exec_())
global_PDF.py定义以下6个全局变量。
global file_address1
global file_address2
global current_dir1
global current_dir2
global fname
global fullname
还有一种运用全局变量的方法，就是在主函数开始的时候声明该变量为全局变量，等到该定义函数需要运用该变量的时候再次声明该变量为全局变量。如：
global fileaddress
calss Main(a,b)
def function(self):
global fileaddress
fileaddress =1
其次，就是利用PyQt5设计小程序的GUI运行界面。
from PyQt5import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(306, 220)
sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(MainWindow.sizePolicy().hasHeightForWidth())
MainWindow.setSizePolicy(sizePolicy)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
self.gridLayout.setObjectName("gridLayout")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setEnabled(True)
font = QtGui.QFont()
font.setFamily("Cambria")
font.setPointSize(16)
font.setBold(True)
font.setItalic(False)
font.setWeight(75)
self.label.setFont(font)
self.label.setAlignment(QtCore.Qt.AlignCenter)
self.label.setObjectName("label")
self.gridLayout.addWidget(self.label, 0, 1, 1, 2)
self.pushButton_F1 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_F1.setEnabled(True)
font = QtGui.QFont()
font.setFamily("Cambria")
font.setPointSize(12)
self.pushButton_F1.setFont(font)
self.pushButton_F1.setObjectName("pushButton_F1")
self.gridLayout.addWidget(self.pushButton_F1, 1, 1, 1, 1)
self.pushButton_F2 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_F2.setEnabled(True)
font = QtGui.QFont()
font.setFamily("Cambria")
font.setPointSize(12)
self.pushButton_F2.setFont(font)
self.pushButton_F2.setObjectName("pushButton_F2")
self.gridLayout.addWidget(self.pushButton_F2, 1, 2, 1, 1)
self.label_4 = QtWidgets.QLabel(self.centralwidget)
font = QtGui.QFont()
font.setFamily("Adobe Devanagari")
font.setPointSize(12)
font.setItalic(True)
self.label_4.setFont(font)
self.label_4.setAlignment(QtCore.Qt.AlignCenter)
self.label_4.setObjectName("label_4")
self.gridLayout.addWidget(self.label_4, 2, 0, 1, 1)
self.lineEdit_F1 = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit_F1.setEnabled(False)
self.lineEdit_F1.setObjectName("lineEdit_F1")
self.gridLayout.addWidget(self.lineEdit_F1, 2, 1, 1, 2)
self.label_5 = QtWidgets.QLabel(self.centralwidget)
font = QtGui.QFont()
font.setFamily("Adobe Devanagari")
font.setPointSize(12)
font.setItalic(True)
self.label_5.setFont(font)
self.label_5.setAlignment(QtCore.Qt.AlignCenter)
self.label_5.setObjectName("label_5")
self.gridLayout.addWidget(self.label_5, 3, 0, 1, 1)
self.lineEdit_F2 = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit_F2.setEnabled(False)
self.lineEdit_F2.setObjectName("lineEdit_F2")
self.gridLayout.addWidget(self.lineEdit_F2, 3, 1, 1, 2)
self.label_7 = QtWidgets.QLabel(self.centralwidget)
font = QtGui.QFont()
font.setFamily("Adobe Devanagari")
font.setPointSize(12)
font.setItalic(True)
self.label_7.setFont(font)
self.label_7.setAlignment(QtCore.Qt.AlignCenter)
self.label_7.setObjectName("label_7")
self.gridLayout.addWidget(self.label_7, 4, 0, 1, 1)
self.pushButton_CB = QtWidgets.QPushButton(self.centralwidget)
font = QtGui.QFont()
font.setFamily("Comic Sans MS")
font.setPointSize(16)
self.pushButton_CB.setFont(font)
self.pushButton_CB.setObjectName("pushButton_CB")
self.gridLayout.addWidget(self.pushButton_CB, 5, 1, 1, 1)
self.label_3 = QtWidgets.QLabel(self.centralwidget)
self.label_3.setEnabled(True)
font = QtGui.QFont()
font.setFamily("Comic Sans MS")
font.setPointSize(9)
font.setBold(False)
font.setItalic(False)
font.setWeight(50)
self.label_3.setFont(font)
self.label_3.setTextFormat(QtCore.Qt.RichText)
self.label_3.setAlignment(QtCore.Qt.AlignCenter)
self.label_3.setObjectName("label_3")
self.gridLayout.addWidget(self.label_3, 6, 2, 1, 1)
self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit.setEnabled(True)
self.lineEdit.setObjectName("lineEdit")
self.gridLayout.addWidget(self.lineEdit, 4, 1, 1, 1)
self.label_6 = QtWidgets.QLabel(self.centralwidget)
self.label_6.setEnabled(True)
font = QtGui.QFont()
font.setFamily("Comic Sans MS")
font.setPointSize(9)
font.setBold(False)
font.setItalic(False)
font.setWeight(50)
self.label_6.setFont(font)
self.label_6.setLayoutDirection(QtCore.Qt.LeftToRight)
self.label_6.setTextFormat(QtCore.Qt.RichText)
self.label_6.setAlignment(QtCore.Qt.AlignLeading|QtCore.Qt.AlignLeft|QtCore.Qt.AlignVCenter)
self.label_6.setObjectName("label_6")
self.gridLayout.addWidget(self.label_6, 4, 2, 1, 1)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 306, 18))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.label.setText(_translate("MainWindow", "PDF文件合成小工具"))
self.pushButton_F1.setText(_translate("MainWindow", "第一个文件"))
self.pushButton_F2.setText(_translate("MainWindow", "第二个文件"))
self.label_4.setText(_translate("MainWindow", "File1 Path:"))
self.label_5.setText(_translate("MainWindow", "File2 Path:"))
self.label_7.setText(_translate("MainWindow", "New File Name:"))
self.pushButton_CB.setText(_translate("MainWindow", "文件合成"))
self.label_3.setText(_translate("MainWindow", "X.Yu @ 2020-08-21"))
self.label_6.setText(_translate("MainWindow", ".pdf"))
欢迎感兴趣的小伙伴对PDF文件操作问题的留言探讨~
2020-09-18