8.python语法for key in keys: if key = one: dada_id = key[''] else break
此时的break表示跳出整个for循环,不在继续执行了当前循环，继续往下执行
for key in keys: if key = one: dada_id = key[''] else continue
此时的continue表示跳出else，继续下一个for到if
