python输出最大的值：键

Question

def get_max_value_and_key(a_dict):

Answer 1

def get_max_value_and_key(a_dict):
    value=None
    key=''
    for k,v in a_dict.items():
        if value==None or value<v:
            value=v
            key=k
    return key,value

data_dict={'cat':91,'hello':24,'a':413,'word':-1,'dog':135}
print(get_max_value_and_key(data_dict))