处理多张发票-计算总发票面额

import os
import pdfplumber
filepath = "/Users/*******/Desktop/报销发票/"
filenames = os.listdir(filepath)
result = []
for file in filenames:
    pdf =  pdfplumber.open(filepath + file)
    first_page = pdf.pages[0]
    items = first_page.extract_table()
    for item in items:
        if item[0] is None:
            continue
        if '合计' in item[0]:
            for i in item:
                if i is None:
                    continue
                if '小写' in i:
                    result.append(i)
# 最终金额产出
final_value = 0.0
import re
for string in result:
    final_value += float(re.findall(r"\d+\.?\d*", string)[-1])