Python 3.x from.pdftypes import PDFObjectNotFound ImportError:无法导入名称'；PDFObjectNotFound'；

我正在尝试将PDF转换为文本。但我在PDFPage课上有问题。我已经找过了。但我什么也没得到，它给了我以下的错误。我还为Python3.5安装了pdfminer.six，但仍然没有得到任何解决方案。请帮忙

代码：

from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from pdfminer.pdfpage import PDFPage
import os
import sys, getopt

#converts pdf, returns its text content as a string


 def extract_text_from_pdf(pdf_path):
    with open(pdf_path, 'rb') as fh:
        for page in PDFPage.get_pages(fh, 
                                      caching=True,
                                      check_extractable=True):
            resource_manager = PDFResourceManager()
            fake_file_handle = io.StringIO()
            converter = TextConverter(resource_manager, fake_file_handle, codec='utf-8', laparams=LAParams())
            page_interpreter = PDFPageInterpreter(resource_manager, converter)
            page_interpreter.process_page(page)

            text = fake_file_handle.getvalue()
            yield text

            # close open handles
            converter.close()
            fake_file_handle.close()

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/system/anaconda3/lib/python3.6/site-packages/pdfminer/pdfpage.py", line 5, in <module>
    from .pdftypes import PDFObjectNotFound
ImportError: cannot import name 'PDFObjectNotFound'

错误：

from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from pdfminer.pdfpage import PDFPage
import os
import sys, getopt

#converts pdf, returns its text content as a string


 def extract_text_from_pdf(pdf_path):
    with open(pdf_path, 'rb') as fh:
        for page in PDFPage.get_pages(fh, 
                                      caching=True,
                                      check_extractable=True):
            resource_manager = PDFResourceManager()
            fake_file_handle = io.StringIO()
            converter = TextConverter(resource_manager, fake_file_handle, codec='utf-8', laparams=LAParams())
            page_interpreter = PDFPageInterpreter(resource_manager, converter)
            page_interpreter.process_page(page)

            text = fake_file_handle.getvalue()
            yield text

            # close open handles
            converter.close()
            fake_file_handle.close()

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/system/anaconda3/lib/python3.6/site-packages/pdfminer/pdfpage.py", line 5, in <module>
    from .pdftypes import PDFObjectNotFound
ImportError: cannot import name 'PDFObjectNotFound'

回溯（最近一次呼叫最后一次）：
文件“”，第1行，在
文件“/home/system/anaconda3/lib/python3.6/site packages/pdfminer/pdfpage.py”，第5行，在
从.pdftypes导入PDFObjectNotFound
ImportError:无法导入名称“PDFObjectNotFound”

在代码的开头添加以下行，并试一试：

from io import StringIO

---

卸载

pdfminer3k

（如果已安装）

然后使用下面的命令安装pdfminer.six

$ python -m pip install pdfminer.six

---

它给了我一个错误，即SyntaxError@Neal Titus ThomasFile“”，io导入字符串的第1行。io^SyntaxError:无效的Syntax抱歉，它是StringIO而不是String。IOPDFPage实际上我有一个问题。（从pdfminer.pdfpage导入pdfpage）它给出了我上传的错误信息。StringIO在这里需要什么？我已经看过了，但仍然不起作用。这给了我同样的错误。我已经试了三天了，但还没有完成。请帮助@Neal Titus Thomas