从基础到进阶带你玩转Python中的JSON

import json
# Python字典
person = {
    'name': '刘杰',
    'age': 29,
    'city': '上海'
}
# 将Python字典转换为JSON字符串
json_string = json.dumps(person, ensure_ascii=False)
print("Python对象转换为JSON字符串:")
print(json_string)

# JSON字符串
json_string = '{"name": "陈辉", "age": 34, "city": "北京"}'
# 将JSON字符串解析为Python字典
data = json.loads(json_string)
print("JSON字符串解析为Python对象:")
print(data)

# Python字典
person = {
    'name': '孙洋',
    'age': 25,
    'city': '成都'
}
# 将Python字典写入JSON文件
with open('person_data.json', 'w', encoding='utf-8') as f:
    json.dump(person, f, ensure_ascii=False)
print("已将Python对象写入JSON文件")

# 从JSON文件读取Python字典
with open('person_data.json', 'r', encoding='utf-8') as f:
    data = json.load(f)
print("已从JSON文件读取Python对象:")
print(data)

# 从JSON文件读取Python字典
with open('person_data.json', 'r', encoding='utf-8') as f:
    data = json.load(f)
# 修改数据
data['age'] = 30
# 将修改后的数据写回JSON文件
with open('person_data.json', 'w', encoding='utf-8') as f:
    json.dump(data, f, ensure_ascii=False)
print("已修改JSON文件中的数据并保存")

# 读取第一个JSON文件
with open('file1.json', 'r', encoding='utf-8') as f:
    data1 = json.load(f)
# 读取第二个JSON文件
with open('file2.json', 'r', encoding='utf-8') as f:
    data2 = json.load(f)
# 合并两个字典
combined_data = {**data1, **data2}
# 将合并后的数据写入新的JSON文件
with open('combined_data.json', 'w', encoding='utf-8') as f:
    json.dump(combined_data, f, ensure_ascii=False)
print("已合并两个JSON文件并保存")

# 从JSON文件读取Python字典
with open('person_data.json', 'r', encoding='utf-8') as f:
    data = json.load(f)
# 添加新键值对
data['job'] = '程序员'
# 将更新后的数据写回JSON文件
with open('person_data.json', 'w', encoding='utf-8') as f:
    json.dump(data, f, ensure_ascii=False)
print("已添加新键值对并保存")

# 从JSON文件读取Python字典
with open('person_data.json', 'r', encoding='utf-8') as f:
    data = json.load(f)
# 删除键值对
del data['city']
# 将更新后的数据写回JSON文件
with open('person_data.json', 'w', encoding='utf-8') as f:
    json.dump(data, f, ensure_ascii=False)
print("已删除键值对并保存")

# Python字典
person = {
    'name': '吴浩',
    'age': 24,
    'city': '厦门'
}
# 格式化输出JSON字符串
json_string = json.dumps(person, indent=4, ensure_ascii=False)
print("格式化输出JSON字符串:")
print(json_string)

# 嵌套的Python字典
nested_person = {
    'name': '赵强',
    'details': {
        'age': 30,
        'city': '武汉'
    }
}
# 将嵌套的Python字典转换为JSON字符串
json_string = json.dumps(nested_person, ensure_ascii=False)
print("嵌套JSON结构转换为JSON字符串:")
print(json_string)