哪一个方法用来返回变量类型？

which function is usd to get type of a variable

答案 type

哪一个方法用来列出一个类下的所有属性，方法，以及变量？

which function is used to list all names of a class's attributes?

答案 dir

字符串方法format是用来去掉字符串的左右空格的么？

is the methods format used to get rid of blank space around a string?

答案 不是

python 的类可以有多个父类么？

can a class inheritance from multiple classes?

答案 是

哪一个函数是用来获得字符串长度？

which function is used to get the length of a string? len

答案 ：len