python json 文件读写

import json
 
test_dict = {'bigberg':,'iPhone':,'Bike':,'shirt':}
 
print(test_dict)
print(type(test_dict))#字典
 
#dumps 将数据转换成字符串
json_str = json.dumps(test_dict)
 
print(json_str)
print(type(json_str))#字符串
 
with open("record.json","w") as f:
    json.dump(test_dict,f)
    print("写入文件完成...")
 
with open("record.json",'r') as load_f:
    load_dict = json.load(load_f)
    print(load_dict)
    print(type(load_dict))#字典
    print("读取文件完成...")
 
#修改文件内容
load_dict['smallberg'] = [,{:[['Python',],['shirt',]]}]
print(load_dict)
 
with open("record.json","w") as dump_f:
    json.dump(load_dict,dump_f)