我在此列表中存储了URL（用于网页抓取）和市政名称：
muni = [("https://openbilanci.it/armonizzati/bilanci/filettino-comune-fr/entrate/dettaglio?year=2021&type=preventivo", "filettino"), ("https://openbilanci.it/armonizzati/bilanci/partanna-comune-tp/entrate/dettaglio?year=2021&type=preventivo","partanna"), ("https://openbilanci.it/armonizzati/bilanci/fragneto-labate-comune-bn/entrate/dettaglio?year=2021&type=preventivo", "fragneto-labate") ]
我尝试为不同的市创建不同的数据集。例如，从第一个URL抓取的数据将是：filettinodak.csv。我现在使用的是以下代码：

import re
import json
import requests
import pandas as pd
import os
import random

os.chdir(r"/Users/aartimalik/Dropbox/data")

muni = [("https://openbilanci.it/armonizzati/bilanci/filettino-comune-fr/entrate/dettaglio?year=2021&type=preventivo", "filettino"), 
("https://openbilanci.it/armonizzati/bilanci/partanna-comune-tp/entrate/dettaglio?year=2021&type=preventivo","partanna"),
("https://openbilanci.it/armonizzati/bilanci/fragneto-labate-comune-bn/entrate/dettaglio?year=2021&type=preventivo", "fragneto-labate")
]

for m in muni[1]:
    URL = m
    r = requests.get(URL)
    p = re.compile("var bilancio_tree = (.*?);")
    data = p.search(r.text).group(1)
    
    data = json.loads(data)
    
    all_data = []
    
    for d in data:
        for v in d["values"]:
            for kk, vv in v.items():
                all_data.append([d["label"], "-", kk, vv.get("abs"), vv.get("pc")])
                
        for c in d["children"]:
            for v in c["values"]:
                for kk, vv in v.items():
                    all_data.append(
                        [d["label"], c["label"], kk, vv.get("abs"), vv.get("pc")]
                        )
                        
    df = pd.DataFrame(all_data, columns=["label 1", "label 2", "year", "abs", "pc"])
    
    df.to_csv(muni[2]+"dak.csv", index=False)

我得到的错误是：Traceback (most recent call last): File "<stdin>", line 19, in <module> TypeError: can only concatenate tuple (not "str") to tuple .
我想我在市政索引方面做错了什么：muni[i].有什么建议吗？非常感谢！