我正在嘗試從PDF中提取文本，以便可以對其進行分析，但是當我嘗試從頁面中提取文本時，出現以下錯誤。Traceback (most recent call last):File "C:\Program Files (x86)\eclipse\plugins\org.python.pydev_2.7.4.2013051601\pysrc\pydevd_comm.py", line 765, in doIt    result = pydevd_vars.evaluateExpression(self.thread_id, self.frame_id, self.expression, self.doExec)File "C:\Program Files (x86)\eclipse\plugins\org.python.pydev_2.7.4.2013051601\pysrc\pydevd_vars.py", line 376, in evaluateExpression    result = eval(compiled, updated_globals, frame.f_locals)File "<string>", line 1, in <module>File "C:\Python33\lib\site-packages\pypdf2-1.9.0-py3.3.egg\PyPDF2\pdf.py", line 1701, in extractText    content = ContentStream(content, self.pdf)File "C:\Python33\lib\site-packages\pypdf2-1.9.0-py3.3.egg\PyPDF2\pdf.py", line 1783, in __init__    stream = StringIO(stream.getData())File "C:\Python33\lib\site-packages\pypdf2-1.9.0-py3.3.egg\PyPDF2\generic.py", line 801, in getData    decoded._data = filters.decodeStreamData(self)File "C:\Python33\lib\site-packages\pypdf2-1.9.0-py3.3.egg\PyPDF2\filters.py", line 228, in decodeStreamData    data = ASCII85Decode.decode(data)File "C:\Python33\lib\site-packages\pypdf2-1.9.0-py3.3.egg\PyPDF2\filters.py", line 170, in decode    data = [y for y in data if not (y in ' \n\r\t')]File "C:\Python33\lib\site-packages\pypdf2-1.9.0-py3.3.egg\PyPDF2\filters.py", line 170, in <listcomp>    data = [y for y in data if not (y in ' \n\r\t')]TypeError: 'in <string>' requires string as left operand, not int相關代碼節如下：from PyPDF2 import PdfFileReaderfor PDF_Entry in self.PDF_List:    Pdf_File = PdfFileReader(open(PDF_Entry, "rb"))    for pg_idx in range(0, Pdf_File.getNumPages()):        page_Content = Pdf_File.getPage(pg_idx).extractText()        for line in page_Content.split("\n"):            self.Analyse_Line(line)將錯誤拋出在extractText（）行。