如何在tkinter和PyPDF2中使用全局變量來合併PDF文件

一直使用Python很短的時間，並且無法弄清楚這段代碼有什麼問題。我找不到任何適用於我的代碼的例子，所以我在這裏問。如何在tkinter和PyPDF2中使用全局變量來合併PDF文件

import sys 
import os 
from PyPDF2 import PdfFileReader, PdfFileMerger, PdfFileWriter 
from tkinter import * 

gui = Tk() 
gui.resizable(0,0) 

gui.geometry("800x600") 
gui.title("PDF Tools") 

l = StringVar() 
l2= StringVar() 
f = StringVar() 
e = StringVar() 

filenamelabel = Label(textvariable=l).place(x=400, y=0) 
filenamelabel2 = Label(textvariable=l2).place(x=400, y=25) 
exportfolderlabel = Label(textvariable=f).place(x=400, y=50) 

finalFileNameForm = Entry(gui).place(x=0, y=75) 

def openFileDialog(): 
    global fileName 
    fileName = filedialog.askopenfilename(initialdir = "/Users/", title="Pick a PDF   file.", filetypes=(("pdf files","*.pdf"),("all files","*.*"))) 
    l.set(fileName) 

def openFileDialog2(): 
    global fileName2 
    fileName2 = filedialog.askopenfilename(initialdir = "/Users/", title="Pick a second  PDF file.", filetypes=(("pdf files","*.pdf"),("all files","*.*"))) 
    l2.set(fileName2) 

def openExportFolderDialog(): 
    global exportFolder 
    exportFolder = filedialog.askdirectory(initialdir = "/Users/", title="Pick an export folder.") 
    f.set(exportFolder) 

def append_pdf(input, output): 
    [output.addPage(input.getPage(page_num)) for page_num in range(input.numPages)] 

def combinePdf(): 
    output = PdfFileWriter() 
    append_pdf(PdfFileReader(file(fileName, "rb")),output) 
    append_pdf(PdfFileReader(file(fileName2, "rb")),output) 

    output.write(file(finalFileName, exportFolder)) 

importpdf1 = Button(text="Import PDF", command=openFileDialog).place(x=0, y=0) 
importpdf2 = Button(text="Import PDF 2", command=openFileDialog2).place(x=0, y=25) 
setexport = Button(text="Set Export Folder", command=openExportFolderDialog).place(x=0, y=50) 
combinepdf = Button(text="Combine PDFs", command=combinePdf).place(x=0, y=100) 

gui.mainloop()

當我運行的代碼，我得到的錯誤是

Exception in Tkinter callback Traceback (most recent call last): File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/tkinter/init.py", line 1487, in call return self.func(*args) File "/Users/chris/Desktop/gui.py", line 43, in combinePdf append_pdf(PdfFileReader(file(fileName, "rb")),output) NameError: name 'file' is not defined

使用Python 3.4.1，Mac OS X小牛

來源

2014-10-11 user1113569

錯誤消息告訴你的問題是什麼。

NameError: name 'file' is not defined

在這種情況下，你在呼喚一個名爲file功能，但沒有定義或導入一個名爲find功能。

您是不是要打電話給open？例如：

append_pdf(PdfFileReader(open(fileName, "rb")),output) 
         ^^^^

來源

2014-10-11 23:20:54

如何在tkinter和PyPDF2中使用全局變量來合併PDF文件

回答

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