python表格檔案讀寫json_Python讀取和寫入JSON檔案,讀寫,json

json子產品封裝了json的讀寫操作,提供了以下4個函數:

dumps: 将一個Python對象編碼為json對象

loads:　将一個json對象解析為Python對象

dump:　寫入json檔案

load:　   讀取json檔案

下面介紹讀取json檔案

一 建立config.json檔案如下:

[

{"symbol":"M2101","Internal":"60m","Trend":"upward","fast_window":"10","slow_window":"20"},

{"symbol":"FG2101","Internal":"60m","Trend":"downward","fast_window":"10","slow_window":"20"}

]

二 建立代碼檔案ReadJson.py如下:

import json

with open('./config.json', 'r') as f:

datas = json.load(f)#datas是字典對象

for data in datas:

print("symbol", data['symbol'], " Trend ", data['Trend'])

三 運作

cmd.exe中執行python ReadJson.py指令,結果如圖: