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使用 pdftotext 终端命令（我正在运行 Ubuntu 17.04）将文本从 PDF 剥离到文本 (.txt) 文件中，然后尝试从文件中读取，我得到了非常奇怪的输出。我用一个包含一个单词的 txt 测试了代码：t​​est.txt。代码有效。它完美地从文件中打印出来，这告诉我它要么是 pdftotext 的错，要么是编码的错。真正让我感动并让我来到这里的是该文件通常在文本编辑器中打开，并且所有测试都表明该文件采用标准 UTF-8。这是我的PDF 剥离文本文件，创建于：

import tkinter
from tkinter.filedialog import askopenfilename
import subprocess
from subprocess import *
import os
from tkinter import Listbox
import sys
from tkinter import Scrollbar
from tkinter import Frame
from tkinter import Label
from tkinter import messagebox
from tkinter import Button

#win32, cygwin, linux, linux2, darwin

def chooser():
    returnedValue['filename'] = askopenfilename(**opts)
    try:
        subprocess.run(['pdftotext', returnedValue['filename'], '-raw'], check = True)
    except (TypeError, subprocess.CalledProcessError) as e:
        messagebox.showerror("Null error", "No file selected")
    if sys.platform == "linux" or sys.platform == "linux2" or sys.platform == "darwin":
        label = returnedValue['filename'].split('/')
        file2['file2'] = label[len(label)-1]
    else:
        label = returnedValue['filename'].split('\\')
        file2['file2'] = label[len(label)-1]

    L.insert(0, label[len(label)-1])

def trello():
    with open(returnedValue['filename'], 'r', encoding='utf8', errors='ignore') as f:
        content = f.readlines()
    content = [x.strip() for x in content]
    for line in content:
        print(line)


opts = {}
opts['filetypes'] = [('Portable Document Format','.pdf'),('all files','.*')]
opts['defaultextension'] = '.pdf'
opts['title'] = 'Select File'
opts['initialdir'] = [os.path.expanduser('~/')]

returnedValue = {}
returnedValue['filename'] = ""
file2 = {}
file2['file2'] = ""
root = tkinter.Tk()

B = Button(root, text = "Convert PDF", command = chooser)
B.pack()

F = Frame(root)

La = Label(F, text="PDFs Converted:")
La.pack()

S = Scrollbar(F)
S.pack(side=tkinter.RIGHT, fill=tkinter.Y)

L = Listbox(F, height=5, yscrollcommand=S.set)
L.pack()

S.config(command=L.yview)

F.pack()

Bue = Button(root, text="Send to Trello", command = trello)
Bue.pack()

root.geometry('{}x{}'.format(500, 500))
root.attributes("-topmost", True)
root.wm_title("PDF Chooser")
root.mainloop()

errors='ignore'这是我在函数中不使用时得到的错误open()：

Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/lib/python3.6/tkinter/__init__.py", line 1702, in __call__
    return self.func(*args)
  File "./pdftotextCVM.py", line 34, in trello
    content = f.readlines()
  File "/usr/lib/python3.6/codecs.py", line 321, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff in position 11:     invalid start byte

这就是我使用. errors=ignore最后的粘贴可以追溯到我的 Ubuntu 终端历史，所以可能还有更多，但你明白了。旁注：如果你不知道，我使用的是 Python 3.6。

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1 回答 1

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向下滚动，越过二进制垃圾，从errors=ignore输出，我看到：

22 0 obj
<<
/Type /Font
/Subtype /Type0
/BaseFont /OXSVSB+TimesNewRoman/Encoding /Identity-H
/ToUnicode 23 0 R
/DescendantFonts[ 24 0 R ]
>>

这些是 PDF 说明。好像输入.pdf。正在打开文件，而不是输出.txt文件。

该trello()函数可能需要在打开文件之前将扩展名从.pdf更改为。.txt

于 2017-01-20T03:50:37.207 回答