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Realeve

class BStudent(BasketballMixin,Student):
pass

class FTeacher(FootballMixin,Teacher):
pass

0 5-5 python中多重继承

2018-12-30

Realeve

import json

class Students(object):
def read(self):
return '["Tim", "Bob", "Alice"]'

s = Students()

print json.load(s)

1 5-4 python中多态

2018-12-30

Realeve

print isinstance(t,Person)
print isinstance(t,Student)
print isinstance(t,Teacher)
print isinstance(t,object)

0 5-3 python中判断类型

2018-12-30

Realeve

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

class Teacher(Person):

def __init__(self, name, gender, course):
super(Teacher,self).__init__(name,gender)
self.course = course

1 5-2 python中继承一个类

2018-12-30

Realeve

class Person(object):

__count = 0

@classmethod
def how_many(cls):
return cls.__count

def __init__(self,name):
self.name = name
Person.__count+=1

print Person.how_many()

p1 = Person('Bob')

print Person.how_many()

0 4-10 python中定义类方法

2018-12-29

Realeve

# -*- coding: UTF-8 -*-
###
def __init__(self, name, score):
self.name = name
self.__score = score

def get_grade(self):
if self.__score>=90:
return 'A-优秀'
elif self.__score>=60:
return 'B-及格'
else:
return 'C-不及格'

0 4-8 python中定义实例方法

2018-12-29

Realeve

class Person(object):

__count = 0

def __init__(self, name):
self.name = name
Person.__count += 1
print Person.__count

p1 = Person('Bob')
p2 = Person('Alice')

try:
print Person.__count
except AttributeError:
print 'attributeerror'

0 4-7 python中类属性和实例属性名字冲突怎么办

2018-12-29

Realeve

class Person(object):
count = 0
def __init__(self,name):
self.name = name
Person.count+=1

p1 = Person('Bob')
print Person.count

p2 = Person('Alice')
print Person.count

p3 = Person('Tim')
print Person.count

0 4-6 python中创建类属性

2018-12-29

Realeve

class Person(object):
def __init__(self, name, score):
self.name = name
self.__score = score

p = Person('Bob', 59)

print p.name
try:
print p.__score
except AttributeError:
print 'attribute error'

0 4-5 python中访问限制

2018-12-29

Realeve

class Person(object):
def __init__(self,name,gender,birth,**kw):
self.name=name
self.gender =gender
self.birth=birth
for k,v in kw.items():
setattr(self,k,v)

xiaoming = Person('Xiao Ming', 'Male', '1990-1-1', job='Student')

print xiaoming.name

1 4-4 python中初始化实例属性

2018-12-29

Realeve

class Person(object):
pass

p1 = Person()
p1.name = 'Bart'

p2 = Person()
p2.name = 'Adam'

p3 = Person()
p3.name = 'Lisa'

L1 = [p1, p2, p3]
L2 = sorted(L1,lambda a, b: cmp(a.name, b.name))

print(L2[0].name)
print(L2[1].name)
print(L2[2].name)

0 4-3 python中创建实例属性

2018-12-29

Realeve

class Person:
pass

xiaoming = Person()
xiaohong = Person()

print xiaoming
print xiaohong
print xiaoming == xiaohong

0 4-2 python之定义类并创建实例

2018-12-29

Realeve

from __future__ import unicode_literals

s = 'am I an unicode?'
print isinstance(s, unicode)

0 3-4 python之使用__future__

2018-12-29

Realeve

try:
import json
except ImportError:
from simplejson import json

print json.dumps({'python':2.7})

0 3-3 python中动态导入模块

2018-12-29

Realeve

from os.path import isdir,isfile

print not isdir(r'/data/webroot/resource/python')
print not isfile(r'/data/webroot/resource/python/test.txt')

0 3-2 python之导入模块

2018-12-29

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