4_1 ptyhon对象转json字符串

"""ptyhon对象转json字符串"""


import json

persons = [
    {'username': '张三', 'age': 18, 'country': 'china'},
    {'username': 'lisi', 'age': 20, 'country': 'USA'}
]
# 使用dumps函数据把列表转成json字符串
json_str = json.dumps(persons)
print(type(json_str))       # <class 'str'>
print(json_str)
# 再把json字符串写入文件
with open('4_1person.json', 'w') as fp:
    fp.write(json_str)

# 也可直接把列表写入文件中
with open('4_1person2.json', 'w') as fp:
    json.dump(persons, fp)
# 对存在中文字符时不做处理会进行编码
with open('4_1person3.json', 'w', encoding="UTF-8") as fp:
    json.dump(persons, fp, ensure_ascii=False)