python合并pdf文件,使用Python3合并PDF文件

「爱情、让人受尽委屈。」 2022-08-30 06:25 252阅读 0赞

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I am writing a small script that needs to merge many one-page pdf files. I want the script to run with Python3 and to have as few dependencies as possible.

For the PDF merging part, I tried using PyPdf. However, the Python 3 support seems to be buggy; It can't handle inkscape generated PDF files (which I need). I have the current git version of PyPdf installed, and the following test script doesn't work:

import PyPDF2

output\_pdf = PyPDF2.PdfFileWriter()

with open("testI.pdf", "rb") as input:

input\_pdf = PyPDF2.PdfFileReader(input)

output\_pdf.addPage(input\_pdf.getPage(0))

with open("test.pdf", "wb") as output:

output\_pdf.write(output)

It throws the following stack trace:

Traceback (most recent call last):

File "test.py", line 7, in

output.addPage(input.getPage(0))

File "/usr/lib/python3.3/site-packages/pyPdf/pdf.py", line 420, in getPage

self.\_flatten()

File "/usr/lib/python3.3/site-packages/pyPdf/pdf.py", line 574, in \_flatten

self.\_flatten(page.getObject(), inherit)

File "/usr/lib/python3.3/site-packages/pyPdf/generic.py", line 165, in getObject

return self.pdf.getObject(self).getObject()

File "/usr/lib/python3.3/site-packages/pyPdf/pdf.py", line 616, in getObject

retval = readObject(self.stream, self)

File "/usr/lib/python3.3/site-packages/pyPdf/generic.py", line 66, in readObject

return DictionaryObject.readFromStream(stream, pdf)

File "/usr/lib/python3.3/site-packages/pyPdf/generic.py", line 526, in readFromStream

value = readObject(stream, pdf)

File "/usr/lib/python3.3/site-packages/pyPdf/generic.py", line 57, in readObject

return ArrayObject.readFromStream(stream, pdf)

File "/usr/lib/python3.3/site-packages/pyPdf/generic.py", line 152, in readFromStream

obj = readObject(stream, pdf)

File "/usr/lib/python3.3/site-packages/pyPdf/generic.py", line 86, in readObject

return NumberObject.readFromStream(stream)

File "/usr/lib/python3.3/site-packages/pyPdf/generic.py", line 231, in readFromStream

return FloatObject(name.decode("ascii"))

File "/usr/lib/python3.3/site-packages/pyPdf/generic.py", line 207, in \_\_new\_\_

return decimal.Decimal.\_\_new\_\_(cls, str(value), context)

TypeError: optional argument must be a context

The same script, however, works flawlessly with Python 2.7.

What am I doing wrong here? Is it a bug in the library? Can I work around it without touching the PyPDF library?

解决方案

So I found the answer. The decimal.Decimal module in Python3.3 shows some weird behaviour. This is the corresponding StackOverflow question: Instantiate Decimal class I added some workaround to the PyPDF2 library and submitted a pull request.

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