PyPDF2 pdf 文件写入提示如下错误:PyPDF2.utils.PdfReadError: Illegal character in Name Object

淡淡的烟草味﹌ 2023-10-10 12:23 1阅读 0赞

今天学习PyPDF2 pdf文件写入其他指定pdf 文件提示如下错误信息:

Traceback (most recent call last):
      File "D:\python35\Lib\site-packages\PyPDF2\generic.py", line 484, in readFromStream
        return NameObject(name.decode('utf-8'))
    UnicodeDecodeError: 'utf-8' codec can't decode byte 0xcb in position 8: invalid continuation byte
    During handling of the above exception, another exception occurred:
    Traceback (most recent call last):
      File "D:\python35\Lib\apps\backstage\views\busi_contract_manage_view.py", line 703, in post
        merge_pdf_result = merge_pdf(final_files, pdf_path)
      File "D:\python35\Lib\apps\utils\doc_convert_util.py", line 86, in merge_pdf
        pdf_writer.write(new_file)
      File "D:\python35\Lib\site-packages\PyPDF2\pdf.py", line 482, in write
        self._sweepIndirectReferences(externalReferenceMap, self._root)
      File "D:\python35\Lib\site-packages\PyPDF2\pdf.py", line 571, in _sweepIndirectReferences
        self._sweepIndirectReferences(externMap, realdata)
      File "D:\python35\Lib\site-packages\PyPDF2\pdf.py", line 547, in _sweepIndirectReferences
        value = self._sweepIndirectReferences(externMap, value)
      File "D:\python35\Lib\site-packages\PyPDF2\pdf.py", line 571, in _sweepIndirectReferences
        self._sweepIndirectReferences(externMap, realdata)
      File "D:\python35\Lib\site-packages\PyPDF2\pdf.py", line 547, in _sweepIndirectReferences
        value = self._sweepIndirectReferences(externMap, value)
      File "D:\python35\Lib\site-packages\PyPDF2\pdf.py", line 556, in _sweepIndirectReferences
        value = self._sweepIndirectReferences(externMap, data[i])
      File "D:\python35\Lib\site-packages\PyPDF2\pdf.py", line 571, in _sweepIndirectReferences
        self._sweepIndirectReferences(externMap, realdata)
      File "D:\python35\Lib\site-packages\PyPDF2\pdf.py", line 547, in _sweepIndirectReferences
        value = self._sweepIndirectReferences(externMap, value)
      File "D:\python35\Lib\site-packages\PyPDF2\pdf.py", line 547, in _sweepIndirectReferences
        value = self._sweepIndirectReferences(externMap, value)
      File "D:\python35\Lib\site-packages\PyPDF2\pdf.py", line 547, in _sweepIndirectReferences
        value = self._sweepIndirectReferences(externMap, value)
      File "D:\python35\Lib\site-packages\PyPDF2\pdf.py", line 577, in _sweepIndirectReferences
        newobj = data.pdf.getObject(data)
      File "D:\python35\Lib\site-packages\PyPDF2\pdf.py", line 1611, in getObject
        retval = readObject(self.stream, self)
      File "D:\python35\Lib\site-packages\PyPDF2\generic.py", line 66, in readObject
        return DictionaryObject.readFromStream(stream, pdf)
      File "D:\python35\Lib\site-packages\PyPDF2\generic.py", line 579, in readFromStream
        value = readObject(stream, pdf)
      File "D:\python35\Lib\site-packages\PyPDF2\generic.py", line 60, in readObject
        return NameObject.readFromStream(stream, pdf)
      File "D:\python35\Lib\site-packages\PyPDF2\generic.py", line 492, in readFromStream
        raise utils.PdfReadError("Illegal character in Name Object")
    PyPDF2.utils.PdfReadError: Illegal character in Name Object

*  分析上面报错部分，可以看出错误来源于E:\\python\_workspace\\TornadoDemo\\venv\\Lib\\site-packages\\PyPDF2\\generic.py", line 484。generic.py文件第484行，原始内容为：

try:
        return NameObject(name.decode('utf-8'))
    except (UnicodeEncodeError, UnicodeDecodeError) as e:
        # Name objects should represent irregular characters
        # with a '#' followed by the symbol's hex number
        if not pdf.strict:
            warnings.warn("Illegal character in Name Object", utils.PdfReadWarning)
            return NameObject(name)
        else:
            raise utils.PdfReadError("Illegal character in Name Object")

*  需要将上述原始内容，修改为如下内容：

try:
                return NameObject(name.decode('utf-8'))
            except (UnicodeEncodeError, UnicodeDecodeError) as e:
                # Name objects should represent irregular characters
                # with a '#' followed by the symbol's hex number
                try:
                    return NameObject(name.decode('gbk'))
                except (UnicodeEncodeError, UnicodeDecodeError) as e:
                    if not pdf.strict:
                        warnings.warn("Illegal character in Name Object", utils.PdfReadWarning)
                        return NameObject(name)
                    else:
                        raise utils.PdfReadError("Illegal character in Name Object")

*  接着，修改utils.py文件中的第238行。utils.py文件中的第238行原始内容如下所示：

r = s.encode('latin-1')
    if len(s) < 2:
        bc[s] = r
    return r

*  需要将上述原始内容，修改为如下内容：

try:
        r = s.encode('latin-1')
    except Exception as e:
        r = s.encode('utf-8')
    if len(s) < 2:
        bc[s] = r
    return r

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pypdf2 指定pdf文件写入其他pdf 文件

# encoding:utf-8
    from PyPDF2 import PdfFileReader, PdfFileWriter
    
    readFile = 'D:\\1.pdf'
    outFile = 'D:\\2.pdf'
    pdfFileWriter = PdfFileWriter()
    
    # 获取 PdfFileReader 对象
    pdfFileReader = PdfFileReader(readFile)  # 或者这个方式：pdfFileReader = PdfFileReader(open(readFile, 'rb'))
    # 文档总页数
    numPages = pdfFileReader.getNumPages()
    
    
    for index in range(0, numPages):
        pageObj = pdfFileReader.getPage(index)
        pdfFileWriter.addPage(pageObj)
        # 添加完每页，再一起保存至文件中
        pdfFileWriter.write(open(outFile, 'wb'))
    pdfFileWriter.addBlankPage()
    pdfFileWriter.addBlankPage()
    pdfFileWriter.write(open(outFile, "wb"))

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