在python字典中操作和打印项目

Question

我有以下代码：

ex_dict={1:"how",3:"do you",7:"dotoday"}
for key in ex_dict:
    string= key," and this is ", ex_dict[key]
    print (string)

输出为：

(1, ' and this is ', 'how')
(3, ' and this is ', 'do you')
(7, ' and this is ', 'dotoday')

我的预期输出：

1 and this is how
3 and this is do you
7 and this is dotoday

我似乎不知道如何去掉输出中的字典格式。你知道吗

Answer 1

替换

string= key," and this is ", ex_dict[key]

与

string= str(key) + " and this is " + ex_dict[key]

在python中，用+而不是

，用于元组