PyPdf2无法添加多个裁剪的页面

Question

我想在一个新的pdf文件中添加多个裁剪框作为新页面。由于下面的代码，我得到新的正确数量的页面，但这里有一个问题。覆盖每个PDF文件中的最后一页。在

有什么建议吗？在

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模块来复制page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()