python Class：面向对象高级编程 __str__ / __repr__

其实：__str__ 与 __repr__效果一样， 人们说：__str__ 是面向用户的， 而__repr__是面向程序员的， 轰朵你？

官网解释：

object.

__repr__

(self)¶

Called by the

repr()

built-in function and by string conversions (reverse
quotes) to compute the “official” string representation of an object. If at all
possible, this should look like a valid Python expression that could be used to
recreate an object with the same value (given an appropriate environment). If
this is not possible, a string of the form

<...some useful description...>

should be returned. The return value must be a string object. If a class
defines

__repr__()

but not

__str__()

, then

__repr__()

is also
used when an “informal” string representation of instances of that class is
required.

object.

__str__

(self)¶

Called by the

str()

built-in function and by the

print

statement to compute the “informal” string representation of an object. This
differs from

__repr__

()

in that it does not have to be a valid Python
expression: a more convenient or concise representation may be used instead.
The return value must be a string object.

看了解释，哪里说是面向用户，哪里又说面向程序员了？？？？看到加粗字了没有，看到下滑线了没有？？？这里说的是作用于所有人好嘛！！！如果非要以自己的职位来说，好吧，好像是这么一回事，真是 淫秽 隐晦的表达。

不说了，先小试一下：
#!/usr/bin/python
# -*- coding: utf-8 -*-
class Student(object):
def __init__(self, name):
self.hah = name

class Str(Student):
def __str__(self):
return 'Str (name: %s)' %self.hah

class Repr(Student):
def __repr__(self):
return 'Repr(name: %s)' % self.hah

s = Student('Michael')
print s.hah



print Str('you')



print Repr('me')



最近非常的狂，不，不是最近，而是这个阶段的我，非常喜欢怼，如果我表达不好，那真是 抱歉了 。。。 你有理，你也来怼我啊，来啊，相互伤害啊！！！