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我们有一个简单的脚本来读取传入的PDF文件。如果横向将其旋转到纵向以供其他程序以后使用。所有运行良好的pyPdf，直到我遇到了一个IndirectObject文件作为页面上的/旋转键的值。该对象是可解析的，所以我可以告诉什么是/ Rotate值，但是当试图旋转Clockwise或rotateCounterClockwise时，我得到了一个回溯，因为pyPdf并不期望在/ Rotate中有一个IndirectObject。我已经做了相当多的尝试用该值覆盖IndirectObject的文件，但我没有得到任何地方。我甚至尝试传递相同的IndirectObject rotateClockwise，它会抛出相同的回溯，在pdf.pyc早一行pyPdf IndirectObject in/Rotate
我简单的问题就是。 。 。是否有pyPdf或PyPDF2的补丁，使它不会窒息这种设置，或者我可以旋转页面的不同方式，或者我还没有看到/考虑过的不同库？我试过PyPDF2，它有同样的问题。我曾将PDFMiner视为替代品，但它似乎更倾向于将信息从PDF文件中取出，而不是操纵它们。下面是我在IPython中pyPDF文件播放输出，输出为PyPDF2是非常相似，但有些信息的格式稍有不同：
In [1]: from pyPdf import PdfFileReader
In [2]: mypdf = PdfFileReader(open("RP121613.pdf","rb"))
In [3]: mypdf.getNumPages()
Out[3]: 1
In [4]: mypdf.resolvedObjects
Out[4]:
{0: {1: {'/Pages': IndirectObject(2, 0), '/Type': '/Catalog'},
2: {'/Count': 1, '/Kids': [IndirectObject(4, 0)], '/Type': '/Pages'},
4: {'/Count': 1,
'/Kids': [IndirectObject(5, 0)],
'/Parent': IndirectObject(2, 0),
'/Type': '/Pages'},
5: {'/Contents': IndirectObject(6, 0),
'/MediaBox': [0, 0, 612, 792],
'/Parent': IndirectObject(4, 0),
'/Resources': IndirectObject(7, 0),
'/Rotate': IndirectObject(8, 0),
'/Type': '/Page'}}}
In [5]: mypage = mypdf.getPage(0)
In [6]: myrotation = mypage.get("/Rotate")
In [7]: myrotation
Out[7]: IndirectObject(8, 0)
In [8]: mypdf.getObject(myrotation)
Out[8]: 0
In [9]: mypage.rotateCounterClockwise(90)
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/root/<ipython console> in <module>()
/usr/lib/python2.7/site-packages/pyPdf/pdf.pyc in rotateCounterClockwise(self, angle)
1049 def rotateCounterClockwise(self, angle):
1050 assert angle % 90 == 0
-> 1051 self._rotate(-angle)
1052 return self
1053
/usr/lib/python2.7/site-packages/pyPdf/pdf.pyc in _rotate(self, angle)
1054 def _rotate(self, angle):
1055 currentAngle = self.get("/Rotate", 0)
-> 1056 self[NameObject("/Rotate")] = NumberObject(currentAngle + angle)
1057
1058 def _mergeResources(res1, res2, resource):
TypeError: unsupported operand type(s) for +: 'IndirectObject' and 'int'
In [10]: mypage.rotateClockwise(90)
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/root/<ipython console> in <module>()
/usr/lib/python2.7/site-packages/pyPdf/pdf.pyc in rotateClockwise(self, angle)
1039 def rotateClockwise(self, angle):
1040 assert angle % 90 == 0
-> 1041 self._rotate(angle)
1042 return self
1043
/usr/lib/python2.7/site-packages/pyPdf/pdf.pyc in _rotate(self, angle)
1054 def _rotate(self, angle):
1055 currentAngle = self.get("/Rotate", 0)
-> 1056 self[NameObject("/Rotate")] = NumberObject(currentAngle + angle)
1057
1058 def _mergeResources(res1, res2, resource):
TypeError: unsupported operand type(s) for +: 'IndirectObject' and 'int'
In [11]: mypage.rotateCounterClockwise(myrotation)
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/root/<ipython console> in <module>()
/usr/lib/python2.7/site-packages/pyPdf/pdf.pyc in rotateCounterClockwise(self, angle)
1048 # @param angle Angle to rotate the page. Must be an increment of 90 deg.
1049 def rotateCounterClockwise(self, angle):
-> 1050 assert angle % 90 == 0
1051 self._rotate(-angle)
1052 return self
TypeError: unsupported operand type(s) for %: 'IndirectObject' and 'int'
我会很乐意提供我的文件如果有人想深入研究它的话。