深入理解JSON

# 写法一：
[{"name":"小明","age":11},{"name":"小红","age":15},{"name":"小玉","age":17}]
# 写法二:
{"name":"小菲","address":"北京"}

# 导入JSON模块
import json

# 准备符合json格式要求的python数据
data=[{"name":"小明","age":11},{"name":"小红","age":15},{"name":"小玉","age":17}]
# 通过 json.dumps(data) 方法把python数据转化为了json数据
json_str=json.dumps(data)
print(type(json_str))
print(json_str)

# 导入JSON模块
import json

# 准备符合json格式要求的python数据
data=[{"name":"小明","age":11},{"name":"小红","age":15},{"name":"小玉","age":17}]
# 通过 json.dumps(data) 方法把python数据转化为了json数据
json_str=json.dumps(data,ensure_ascii=False)
print(type(json_str))
print(json_str)

# 准备符合json格式要求的python数据
data2={"name":"小菲","address":"北京"}
json_str2=json.dumps(data2,ensure_ascii=False)
print(type(json_str2))
print(json_str2)

# 导入JSON模块
import json
# 通过 json.loads(data)方法把json数据转化为了 python数据
s1='[{"name":"小明","age":11},{"name":"小红","age":15},{"name":"小玉","age":17}]'
l1=json.loads(s1)
print(type(l1))
print(l1)

s2='{"name":"小菲","address":"北京"}'
l2=json.loads(s2)
print(type(l2))
print(l2)

s1 = "[{\"name\":\"小明\",\"age\":11},{\"name\":\"小红\",\"age\":15},{\"name\":\"小玉\",\"age\":17}]"

s1 = '[{"name":"小明","age":11},{"name":"小红","age":15},{"name":"小玉","age":17}]'

# 导包
import json

# 处理数据
f_us=open("D:/美国.txt","r",encoding="UTF-8")
# 读取美国的全部内容
us_data=f_us.read()
# 去掉不合JSON规范的开头
us_data=us_data.replace("jsonp_1629344292311_69436(","")
# 去掉不合JSON规范的结尾
us_data=us_data[:-2]
# JSON转python字典
us_dict=json.loads(us_data)
# 获取trend key
trend_data=us_dict["data"][0]["trend"]
# 获取日期数据
date=trend_data["updateDate"]
print(date)

"""
/*
* 提示：该行代码过长，系统自动注释不进行高亮。一键复制会移除系统注释 
* 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*/
"""