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  • python json,pickle,shelve模块

    '''
    json:
    用于不同程序之间的数据交换
    dumps loads:json格式处理函数
    dump load:主要用来读写json文件函数
    pickle:
    主要用来读写json文件函数,读取和存储都以字节形式。函数和json的差不多
    shelve:
    shelve模块比pickle模块简单,只有一个open函数,返回类似字典的对象,可读可写
    '''
    file_path = 'json.txt'
    dn = {'baidu': 'www.baidu.com', 'qq': 'www.qq.com', '360': 'www.360.cn'}
    name = ['mayun', 'mahuateng', 'liyanhong']
    import json
    def json_dump():
    with open(file_path,'w') as f_write,
    open(file_path,'r') as f_read:
    json.dump(dn,f_write)
    f_write.close()
    data = json.load(f_read)
    print(data)
    def json_dumps():
    with open(file_path,'w') as f_write,
    open(file_path,'r') as f_read:
    f_write.write(json.dumps(dn))
    f_write.close()
    data = f_read.read()
    dicts = json.loads(data)
    print(dicts)

    import pickle
    def pickle_dump():
    with open(file_path,'wb') as f_write,
    open(file_path,'rb') as f_read:
    pickle.dump(dn,f_write) ##写一个对象
    pickle.dump(name,f_write) ##再写一个对象
    f_write.close()

    data=pickle.load(f_read)
    print(data)
    data = pickle.load(f_read)
    print(data)

    import shelve
    def shelve_test():
    f = shelve.open(file_path)
    f['baidu'] = 'www.baidu.com'
    f['qq'] = 'www.qq.com'
    f['360'] = 'www.360.cn'
    f.close()
    f = shelve.open(file_path)
    print(dict(f))
    if __name__ == '__main__':
    # json_dump()
    # json_dumps()
    # pickle_dump()
    shelve_test()
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  • 原文地址:https://www.cnblogs.com/lides/p/11116454.html
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