python Class:面向對象高級編程 __str__ / __repr__
官網解釋:
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,<...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 theprint
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.
看了解釋,哪裏說是面向用戶,哪裏又說面向程序員了????看到加粗字了沒有,看到下滑線了沒有???這裏說的是作用於所有人好嘛!!!如果非要以自己的職位來說,好吧,好像是這麽一回事,真是 淫穢 隱晦的表達。
不說了,先小試一下:
#!/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,而是這個階段的我,非常喜歡懟,如果我表達不好,那真是 抱歉了 。。。 你有理,你也來懟我啊,來啊,相互傷害啊!!!
python Class:面向對象高級編程 __str__ / __repr__