json檔案如下：
[{
“fontFamily”: “微軟雅黑”,
“fontSize”: 12,
“BaseSettings”:{
“font”:1,
“size”:2
}
}
{
“fontFamily”: “微黑”,
“fontSize”: 22,
“BaseSettings”:{
“font”:2,
“size”:3
}
}]

import json

def loadFont():
    f = open("Settings.json", encoding='utf-8')  //設定以utf-8解碼模式讀取檔案，encoding引數必須設定，否則預設以gbk模式讀取檔案，當檔案中包含中文時，會報錯
    setting = json.load(f)
    family = setting[0]['BaseSettings']['size']   //注意多重結構的讀取語法
    size = setting['fontSize']   
    return family

t = loadFont()

print(t)