类的定制

__author__ = 'lulongfei'
class Student(object):
def __init__(self, name):
self.name = name

print Student('Michael')

class Student(object):
def __init__(self, name):
self.name = name

def __str__(self):
return 'Student object (name: %s)'% self.name

# print Student('Michael')

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

class Student(object):
def __init__(self, name):
self.name = name

def __str__(self):
return 'Student object (name :%s)'%self.name

__repr__ = __str__

s = Student('Michael')
s

class Fib(object):
def __init__(self):
self.a, self.b = 0, 1

def __iter__(self):
return self

def next(self):
self.a, self.b = self.b, self.a + self.b
if self.a > 1000:
raise StopIteration()
return self.a

for n in Fib():
print n

class Fib(object):
def __getitem__(self, n):
if isinstance(n, int):
a, b = 1, 1
for x in range(n):
a, b = b, a + b
return a
if isinstance(n, slice):
start = n.start
stop = n.stop
a, b = 1, 1
L = []
for x in range(stop):
if x >= start:
L.appent(a)
a, b = b, a + b
return L

class Student(object):

def __init__(self):
self.name = 'Michael'

def __getattr__(self, attr):
if attr == 'score':
return 99

s = Student()
print s.name

print  s.score

class Student(object):
def __getattr__(self, attr):
if attr == 'age':
return lambda : 25

a = Student()
print a.age()

class Student(object):

def __getattr__(self, attr):
if attr == 'age':
return lambda :25

raise AttributeError('\'Student\' object has no attribute\'%s\''% attr)

s = Student()
s.name

class Student(object):
def __init__(self, name):
self.name = name

def __call__(self):
print 'My name is %s.'%self.name

s = Student('Michael')
s()

callable(Student())
print callable(max)