参数： dict1， dict2

需求：如果dict1和dict2中有不同的key，那么返回这个(key， dict1[key])；如果dict1和dict2中有相同的key，但是value不同，返回这个(key， dict1[key])

实现：

def dict_different_data(first, second):    """    get the different data bewtten two dicts objects    return :result = first - second    """    assert isinstance(first, dict)    assert isinstance(second, dict)    different_data = {}    update_key = set(first).intersection(set(second))    insert_key = set(first).difference(set(second))    delet_key =  set(second).difference(set(first))    #updata data item which are both on first and second  and Not equal values    for k in update_key:        if(isinstance(first[k], dict)):            result = dict_different_data(first[k], second[k])            if len(result) > 0:                different_data[k] = result        elif first[k] != second[k]:            different_data[k] = first[k]            #insert new item from first    for k in insert_key:        different_data[k] = first[k]    #delet data     for k in delet_key :        different_data[k] = None            return different_dataif __name__ == "__main__":    dic1 = {        'name': 'test',        'score': 89    }    dic2 = {        'name': 'test',        'score': 29,        'age': 23    }    result = dict_different_data(dic2, dic1)    print result