如何使用 PDFminer 避免密码错误的 PDF 文件

Question

我想从我的计算机收集所有 PDF 文件并从每个文件中提取文本。我目前使用的两个功能都是这样做的，但是，一些 PDF 文件给我这个错误：

raise PDFPasswordIncorrect 
pdfminer.pdfdocument.PDFPasswordIncorrect

我在打开和读取 PDF 文件的功能中提出了错误，这似乎在忽略错误方面起作用，但现在它忽略了所有 PDF 文件，包括以前不是问题的好文件。

我怎样才能让它只忽略给我这个错误的 PDF 文件而不是每个 PDF？

def pdfparser(x):
    try:
        raise PDFPasswordIncorrect(pdfminer.pdfdocument.PDFPasswordIncorrect)
        fp = open(x, 'rb')
        rsrcmgr = PDFResourceManager()
        retstr = io.StringIO()
        codec = 'utf-8'
        laparams = LAParams()
        device = TextConverter(rsrcmgr, retstr, codec=codec, laparams=laparams)
        # Create a PDF interpreter object.
        interpreter = PDFPageInterpreter(rsrcmgr, device)
        # Process each page contained in the document.
    except (RuntimeError, TypeError, NameError,ValueError,IOError,IndexError,PermissionError):
         print("Error processing {}".format(name))

    for page in PDFPage.get_pages(fp):
        interpreter.process_page(page)
        data =  retstr.getvalue()

    return(data)

    def pdfs(files):
            for name in files:
                    try:
                        IP_list = (pdfparser(name))
                        keyword = re.findall(inp,IP_list)
                        file_dict['keyword'].append(keyword)
                        file_dict['name'].append(name.name[0:])
                        file_dict['created'].append(time.ctime(name.stat().st_ctime))
                        file_dict['modified'].append(time.ctime(name.stat().st_mtime))
                        file_dict['path'].append(name)
                        file_dict["content"].append(IP_list)
                    except (RuntimeError, TypeError, NameError,ValueError,IOError,IndexError,PermissionError):
                        print("Error processing {}".format(name))
                    #print(file_dict)
            return(file_dict)
    pdfs(files)

Answer 1

为什么 如果您打开受密码保护的 Pdf，如果您没有提供正确的密码，您会手动引发错误吗？

您的代码每次都会引发此错误！

相反，您需要在发生错误时捕获错误并跳过该文件。查看更正后的代码：

def pdfparser(x): try: # try to open your pdf here - do not raise the error yourself! # if it happens, catch and handle it as well except PDFPasswordIncorrect as e: # catch PDFPasswordIncorrect print("Error processing {}: {}".format(name,e)) # with all other errors # no sense in doing anything if you got an error until here return None # do something with your pdf and collect data data = [] return(data) def pdfs(files): for name in files: try: IP_list = pdfparser(name) if IP_list is None: # unable to read for whatever reasons continue # process next file # do stuff with your data if you got some # most of these errors are already handled inside pdfparser except (RuntimeError, TypeError, NameError,ValueError, IOError,IndexError,PermissionError): print("Error processing {}".format(name)) return(file_dict) pdfs(files)

def pdfs(files): 中的第二个 try/catch: 可以缩小，所有与文件相关的错误都发生在 def pdfparser(x): 中并在那里处理。您的其余代码不完整，引用了我不知道的内容：

file_dict inp name # used as filehandle for .stat() but is a string etc

如何使用 PDFminer 避免密码错误的 PDF 文件

How to avoid PDF files with incorrect password error using PDFminer

python

pdf

python-3.x

try-except

pdfminer