使用Python PDFMiner将多个PDF提取为文本文件的循环脚本

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

def extract_text_from_pdf(pdf_path):
    resource_manager = PDFResourceManager()
    output_string = io.StringIO()
    codec = 'utf-8'
    laparams = LAParams()
    device = TextConverter(resource_manager, output_string, codec=codec, laparams=laparams)
    with open(pdf_path, 'rb') as file:
        interpreter = PDFPageInterpreter(resource_manager, device)
        for page in PDFPage.get_pages(file, check_extractable=True):
            interpreter.process_page(page)
    text = output_string.getvalue()
    device.close()
    output_string.close()
    return text

pdf_folder = 'path/to/pdf/folder'
output_folder = 'path/to/output/folder'

for filename in os.listdir(pdf_folder):
    if filename.endswith('.pdf'):
        pdf_path = os.path.join(pdf_folder, filename)
        text = extract_text_from_pdf(pdf_path)
        output_path = os.path.join(output_folder, filename.replace('.pdf', '.txt'))
        with open(output_path, 'w', encoding='utf-8') as file:
            file.write(text)