Question

我有一个pdf文件“myFile.pdf”。我想使用pyPdf来颠倒其网页的顺序。怎么样？

Answer 1

from pyPdf import PdfFileWriter, PdfFileReader
output_pdf = PdfFileWriter()

with open(r'input.pdf', 'rb') as readfile:
    input_pdf = PdfFileReader(readfile)
    total_pages = input_pdf.getNumPages()
    for page in xrange(total_pages - 1, -1, -1):
        output_pdf.addPage(input_pdf.getPage(page))
    with open(r'output.pdf', "wb") as writefile:
        output_pdf.write(writefile)

Answer 2

感谢您分享建议。在选择和保存文件时，我使用了它们并进行了一些编辑，以使界面更加图形化。所有这一切的新内容，以及我添加的内容可能不是高效或干净的，但它对我有用，并认为可以分享。

from PyPDF2 import PdfFileWriter, PdfFileReader
import tkinter as tk
from tkinter import filedialog
import ntpath
import os


output_pdf = PdfFileWriter()

# grab the location of the file path sent
def path_leaf(path):
    head, tail = ntpath.split(path)
    return head

# graphical file selection
def grab_file_path():
    # use dialog to select file
    file_dialog_window = tk.Tk()
    file_dialog_window.withdraw()  # hides the tk.TK() window
    # use dialog to select file
    grabbed_file_path = filedialog.askopenfilename()
    return grabbed_file_path


# file to be reversed
filePath = grab_file_path()

# open file and read
with open(filePath, 'rb') as readfile:
    input_pdf = PdfFileReader(readfile)

    # reverse order one page at time
    for page in reversed(input_pdf.pages):
        output_pdf.addPage(page)

    # graphical way to get where to select file starting at input file location
    dirOfFileToBeSaved = path_leaf(filePath)
    locationOfFileToBeSaved=filedialog.asksaveasfilename(initialdir=dirOfFileToBeSaved, initialfile='name of reversed file.pdf',title="Select or type file name and location", filetypes=[("pdf files", "*.pdf")])
    # write the file created
    with open(locationOfFileToBeSaved, "wb") as writefile:
        output_pdf.write(writefile)

# open the file when done
os.startfile(locationOfFileToBeSaved)

Answer 3

从2019年1月开始（很早），pyPdf不再更新，并且经过测试与（至少）Python 3.6不兼容，并且可能与Python 3完全不兼容。

In [1]: import pyPdf
---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
<ipython-input-1-bba5a42e9137> in <module>
----> 1 import pyPdf

c:\temp\envminecart\lib\site-packages\pyPdf\__init__.py in <module>
----> 1 from pdf import PdfFileReader, PdfFileWriter
      2 __all__ = ["pdf"]

ModuleNotFoundError: No module named 'pdf'

（将__all__分配移到import上方可解决此特定问题，但由于Python 2语法，其他SyntaxError会弹出。）

幸运的是，它的后续项目PyPDF2在Python 3.6（至少）上可以正常工作。看来核心的面向用户的API是有意维护的，以便与pyPdf兼容，因此pip install PyPDF2之后nosklo's answer可以在{{1 }}语句，然后将PyPDF2切换为import：

xrange

我还建议使用更加Pythonic的方法，即直接使用reversed遍历页面：

range

我不知道这个from PyPDF2 import PdfFileWriter, PdfFileReader output_pdf = PdfFileWriter() with open(r'input.pdf', 'rb') as readfile: input_pdf = PdfFileReader(readfile) total_pages = input_pdf.getNumPages() for page in range(total_pages - 1, -1, -1): output_pdf.addPage(input_pdf.getPage(page)) with open(r'output.pdf', "wb") as writefile: output_pdf.write(writefile)集合是否在原始from PyPDF2 import PdfFileWriter, PdfFileReader output_pdf = PdfFileWriter() with open('input.pdf', 'rb') as readfile: input_pdf = PdfFileReader(readfile) for page in reversed(input_pdf.pages): output_pdf.addPage(page) with open('output.pdf', "wb") as writefile: output_pdf.write(writefile)中可用，但是可以说，这实际上并不重要。

如何使用pyPdf反转pdf文件中页面的顺序？

3 个答案: