PyPdf2 无法添加多个裁剪页面

Question

我想在新的 pdf 文件中添加多个裁剪框作为新页面。作为以下代码的结果，我得到了正确数量的新页面，但这是问题所在。最后一页覆盖 PDF 文件中的每一页。

有什么建议吗？

from PyPDF2 import PdfFileWriter, PdfFileReader

output = PdfFileWriter()
input1 = PdfFileReader(open("1.pdf", "rb"))
outputStream = open("output.pdf", "wb")

page = input1.getPage(0)

page.mediaBox.lowerRight = (205+(0*185), 612)
page.mediaBox.upperLeft = (20+(0*185), 752)
output.addPage(page)
output.write(outputStream)

page.mediaBox.lowerRight = (205+(1*185), 612)
page.mediaBox.upperLeft = (20+(1*185), 752)
output.addPage(page)
output.write(outputStream)

page.mediaBox.lowerRight = (205+(2*185), 612)
page.mediaBox.upperLeft = (20+(2*185), 752)
output.addPage(page)
output.write(outputStream)


outputStream.close()

Answer 1

您需要 copy 模块才能复制页面对象。有一个解释 in the docs:

Assignment statements in Python do not copy objects, they create bindings between a target and an object. For collections that are mutable or contain mutable items, a copy is sometimes needed so one can change one copy without changing the other. This module provides generic shallow and deep copy operations (explained below).

所以你的代码应该是这样的：

from PyPDF2 import PdfFileWriter, PdfFileReader
from copy import copy

output = PdfFileWriter()
input1 = PdfFileReader(open("1.pdf", "rb"))
outputStream = open("output.pdf", "wb")

page = input1.getPage(0)

x = copy(page)
y = copy(page)
z = copy(page)

x.mediaBox.lowerRight = (205 + (0 * 185), 612)
x.mediaBox.upperLeft = (20 + (0 * 185), 752)
output.addPage(x)

y.mediaBox.lowerRight = (205 + (1 * 185), 612)
y.mediaBox.upperLeft = (20 + (1 * 185), 752)
output.addPage(y)

z.mediaBox.lowerRight = (205 + (2 * 185), 612)
z.mediaBox.upperLeft = (20 + (2 * 185), 752)
output.addPage(z)

output.write(outputStream)
outputStream.close()

PyPdf2 无法添加多个裁剪页面

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pypdf2