类型错误，同时将pdf转换为txt文件

Question

我写了一个函数，可以将目录中的每个pdf转换为文本，我想从pdf中获取转换后的文本作为txt文件。我收到"类型错误：预期的 str、字节或 os。路径类对象，而不是元组"错误在我的代码中。谁能帮我解决这个问题。在此处附加代码：

import io
import os
import os.path
from pdfminer.converter import TextConverter
from pdfminer.pdfinterp import PDFPageInterpreter
from pdfminer.pdfinterp import PDFResourceManager
from pdfminer.pdfpage import PDFPage
    def extract_text_from_pdf(pdf_path):
        resource_manager = PDFResourceManager()
        fake_file_handle = io.BytesIO()
        converter = TextConverter(resource_manager, fake_file_handle)
        page_interpreter = PDFPageInterpreter(resource_manager, converter)
        with open(pdf_path, 'rb') as fh:
            for page in PDFPage.get_pages(fh, 
                                          caching=True,
                                          check_extractable=True):
                page_interpreter.process_page(page)
            text = fake_file_handle.getvalue()
        # close open handles
        converter.close()
        fake_file_handle.close()
        if text:
            return text
    def save_to_txt(lst):
            for i, ele in enumerate(lst): 
                txtfile = "{}.txt".format(i)
                files = extract_text_from_pdf(ele)
                with open(txtfile, "w") as textfile:
                    textfile.write(files) 
    if __name__ == '__main__':
        pdf_path = 'C:\Users\Lenovo\.spyder-py3\OCR'
        for root, _, files in os.walk(pdf_path):
            for filename in files:
                filepath = os.path.join(root, filename)
                extract_text_from_pdf(filepath)
        for f in filepath:
            save_to_txt(f)

错误如下：

runfile('C:/Users/Lenovo/.spyder-py3/updatedpy.py', wdir='C:/Users/Lenovo/.spyder-py3')
Traceback (most recent call last):
  File "<ipython-input-17-f6b3bb00c382>", line 1, in <module>
    runfile('C:/Users/Lenovo/.spyder-py3/updatedpy.py', wdir='C:/Users/Lenovo/.spyder-py3')
  File "C:Program Files (x86)Microsoft Visual StudioSharedAnaconda3_64libsite-packagesspyderutilssitesitecustomize.py", line 705, in runfile
    execfile(filename, namespace)
  File "C:Program Files (x86)Microsoft Visual StudioSharedAnaconda3_64libsite-packagesspyderutilssitesitecustomize.py", line 102, in execfile
    exec(compile(f.read(), filename, 'exec'), namespace)
  File "C:/Users/Lenovo/.spyder-py3/updatedpy.py", line 47, in <module>
    extract_text_from_pdf(file)
  File "C:/Users/Lenovo/.spyder-py3/updatedpy.py", line 22, in extract_text_from_pdf
    with open(pdf_path, 'rb') as fh:
TypeError: expected str, bytes or os.PathLike object, not tuple

Answer 1

错误来自在主部分中使用 os.walk 方法，该方法不返回文件名，而是返回元组。有关更多详细信息，请参阅操作系统文档。

编辑：你可以像这样使用os.walk方法：

for root, _, files in os.walk(pdf_path):
    for filename in files:
        filepath = os.path.join(root, filename)
        extract_text_from_pdf(filepath)

或者，您可以使用 path.py 库并使用 walkfiles 方法。这样你就可以做到：

from path import Path
pdf_path = Path('C:\dev') 
for file in pdf_path.walkfiles():
    extract_text_from_pdf(file)