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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？
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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 astring 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 printstatement to compute the “informal” string representation of an object. This
differs from__repr__() in that itdoes 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！！！