如何使用发布请求获取json数据

Question

我正在尝试获取json数据并将其转换为Dataframe 贝娄是我的代码

import sys, os, time, time
import pandas as pd
import json
import requests
from pandas.io.json import json_normalize

url = "https://www.theglobaleconomy.com/ajax/ajax_get_one_country_graph_monthly.php" 

DataAll = pd.DataFrame()
headers = {
           'Accept-Encoding': 'gzip, deflate, br',
           'Accept-Language': 'en-US,en;q=0.9',
           'Connection': 'keep-alive',
           'Content-Length': '86',
           'Content-Type': 'application/x-www-form-urlencoded',
           'Cookie': 'cookiesNotification=bgv%40%21%23; PHPSESSID=3430d15c8295340d340984f4726c171d; __gads=ID=cbac903191e62d31:T=1583214794:S=ALNI_MbEMX0Tr0sqGlTq_GDjYVQ9Qitq0Q; howToFind=1; __utma=164978938.789649024.1582004744.1583247321.1583296676.5; __utmc=164978938; __utmz=164978938.1583296676.5.5.utmcsr=knoema.com|utmccn=(referral)|utmcmd=referral|utmcct=/WLDTGEPMI2019/purchasing-managers-index-pmi; __utmt=1; __utmb=164978938.2.10.1583296676',
           'Host': 'www.theglobaleconomy.com',
           'Origin': 'https://www.theglobaleconomy.com',
           'Referer': 'https://www.theglobaleconomy.com/Australia/pmi_composite/',
           'Sec-Fetch-Dest': 'empty',
           'Sec-Fetch-Mode': 'cors',
           'Sec-Fetch-Site': 'same-origin',
           'User-Agent': 'Mozilla/5.0',
          }
#Form data taken as params
params =  {
           'yearFrom': '2019',
           'monthFrom': '1',
           'yearTo': '2020',
           'monthTo': '12',
           'countryId': '160',
           'indicator': 'pmi_composite'
          }

try:
    Res = requests.post(url, headers = headers,data= params, allow_redirects=False)
    print(Res.text)
except requests.exceptions.ConnectionError:
    Res.status_code = "Connection refused"

if not Res == None:
   JsonData = json.loads(Res.text)
   Data = json_normalize(JsonData['data'])
   DataAll = DataAll.append(Data)

我收到以下错误提示 从None提高JSONDecodeError（“期望值”，s，err.value） json.decoder.JSONDecodeError：期望值：第1行第1列（字符0）

＃

这是json预览的样子

true | [{{“ year”：“ 2019”，“ month”：“ 1”，“ value”：51.3，“ country_id”：“ 160”}，{“ year”：“ 2019”，“ month” ：“ 2”，“值”：52.9，“ country_id”：“ 160”}，{“年”：“ 2019”，“月”：“ 3”，“值”：49.5，“ country_id”：“ 160” }，{“ year”：“ 2019”，“ month”：“ 4”，“ value”：50，“ country_id”：“ 160”}，{“ year”：“ 2019”，“ month”：“ 5” ，“ value”：51.5，“ country_id”：“ 160”}，{“ year”：“ 2019”，“ month”：“ 6”，“ value”：52.5，“ country_id”：“ 160”}，{“ year“：” 2019“，” month“：” 7“，” value“：52.1，” country_id“：” 160“}，{” year“：” 2019“，” month“：” 8“，” value“ ：49.3，“ country_id”：“ 160”}，{“ year”：“ 2019”，“ month”：“ 9”，“ value”：52，“ country_id”：“ 160”}，{“ year”：“ 2019“，” month“：” 10“，” value“：50，” country_id“：” 160“}，{” year“：” 2019“，” month“：” 11“，” value“：49.7，” country_id“：” 160“}，{” year“：” 2019“，” month“：” 12“，” value“：49.8，” country_id“：” 160“}，{” year“：” 2020“，” month“：” 1“，” value“：50.2，” country_id“：” 160“}，{” year“：” 2020“，” month“：” 2“，” value“：48.3，” country_id“：” 160“}] |索引点

＃

请帮助我输入代码。