以下是我下的語法,run之後出現string indices must be integers,不知道該怎樣解決,有去網路上爬文仍不知道該如何解決,想問問該如何修改。

import requests
import datetime
import json

timeout = 3

try:
resp = requests.get(url="https://www.taiwanstat.com/powers/latest/", verify=True, timeout=timeout)
if resp.status_code != 200:
print('invalid url:', resp.url)

else:

    try:
        _obj_json = resp.json()
        
        with open('power.json', 'w', encoding='utf-8') as f:
            json.dump(_obj_json,f, indent=4)
            print(type(_obj_json))
            
        _power_list = _obj_json
        _my_power_list = []
        
        for _power in _power_list:
            _updateTime=_power['updateTime']
            _eastSupply=_power['eastSupply']
            _centerSupply=_power['centerSupply']
            _northSupply=_power['northSupply']
            _southSupply=_power['southSupply']
            _southUsage=_power['southUsage']
            _eastUseag=_power['eastUsage']
            _northUsage=_power['northUsage']
            _centerUsage=_power['centerUsage']
            print("更新時間: {}, 東部及時發電量: {}, 中部及時發電量: {}, 北部及時發電量:{}, 南部及時發電量:{}, 南部及時用電量:{}, 東部及時用電量:{}, 北部及時用電量:{}, 中部及時用電量:{}".format(_updateTime, _eastSupply, _centerSupply, _northSupply, _southSupply, _southUsage, _eastUseag, _northUsage, _centerUsage))
            _dbitem = [_updateTime, float(_eastSupply), float(_centerSupply), float(_northSupply), float(_southSupply), float(_southUsage), float(_eastUsage), float(_northUsage), float(_centerUsage)]
            _my_stock_list.append(_dbitem)
            
        #with open('twse_my_0520.json', 'w', encoding='utf-8') as f:
            #json.dump(_my_stock_list, f, indent=4)
    except ValueError as e:
        print("JSON parsing Error")

except requests.HTTPError as e:
print("The server returned an HTTP error")