使用 python 中的输入字符串格式化字典

Question

我正在使用以下代码从网站上抓取数据，其中三个字段由用户输入填写。

import requests 
import json
  

URL = "http://example.com"
  
docs = input("Doc type: ")
fromdate = input("From: ")
todate = input("To: ")

r = requests.post(url = URL, json = {"MaxRows":0,"RowsPerPage":0,"StartRow":0,"DocTypes":'"{}"',"FromDate":'"{}"',"ToDate":'"{}"'.format(docs,fromdate,todate)})
r.json()

但我收到这样的错误

{'exceptionMessage': 'Input string was not in a correct format.', 'exceptionType': 'System.FormatException', 'message': 'An error has occurred.', 'stackTrace': ' at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)\r\n at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)\r\n at BrowserView.Models.SearchCriteria.Parse()\r\n at BrowserView.Controllers.SearchController.SearchTwo(SearchCriteria criteria)'}

我想要下面给出的代码

json = {"MaxRows":0,"RowsPerPage":0,"StartRow":0,"DocTypes":'"{}"',"FromDate":'"{}"',"ToDate":'"{}"'.format(docs,fromdate,todate)}

用户输入数据时这样

json = {"MaxRows":0,"RowsPerPage":0,"StartRow":0,"DocTypes":"TAX","FromDate":"20201104","ToDate":"20201218"}

Answer 1

这个怎么样：

r = requests.post(url=URL, json= 
    {
      "MaxRows": 0,
      "RowsPerPage": 0,
      "StartRow": 0,
      "DocTypes": docs,
      "FromDate": fromdate,
      "ToDate": todate
     })

input() 将 return 每个值作为字符串，不需要格式字符串。

Answer 2

如果问题仅出在将变量插入 json 中，请尝试以下操作：

r = requests.post(url=URL, json={"MaxRows":0,"RowsPerPage":0,"StartRow":0,"DocTypes":f'{docs}',"FromDate":f'{fromdate}',"ToDate":f'{todate}'})

使用 python 中的输入字符串格式化字典

Format Dictionary using input string in python

python

python-requests

python-jsons

python-requests-json