python内置函数 build_in_functions

上一篇 / 下一篇 2017-08-29 11:20:40 / 个人分类：python

参考地址：

https://docs.python.org/2/library/functions.html#property

http://www.runoob.com/python/python-built-in-functions.html

#-*- coding:utf-8 -*-

import sys

import time

#definition de

# message = u'Call me at 415-555-4242 tomorrow . 415-555-9999 is my office'

# for i in range(len(message)):

#     chunk = message[i:i+12]

#     if isPhoneNumber(chunk):

#         print ('Phone number found:'+chunk)

#     print('Done')

#take the remainder

# print divmod(2, 5)

#catch user's input

# a=input('input:')

# b=raw_input('input2:')

# print a,b

#static method

# class C(object):

#     #staticmethod not need instantiation

#     #@staticmethod

#     def  f(agrgs):

#         print ('static method')

#staticmethod can immediate call

# C.f('a')

#not staticmethod need instantiation

# name=C()

# name.f()

#all function

# def all(iterable):

#     #iterable  is a  tuple or list

#     for element in iterable:

#         if not element:

#             print 'false'

#             return False

#     print 'true'

#     return True

# all(['a',False])

# all(['a',''])

# all(['a',0])

# all(['a'])

#enumerater()

# seasons=['zhuhuan','zhuhuanya','huanhuan']

# print list(enumerate(seasons))

# print list(enumerate(seasons,start=1))

#

# def enumerater(sequence,start=0):

#     n=start

#     for elem in sequence:

#         yield n,elem

#         n+=1

# print list(enumerater(['zhuhuan','zhuhuanya','huanhuan'],start=0))

# print int(' 123')

# print  chr(57)

# print  chr(0x30)

# print ord(u'\u0031')#unicode转换为10进制

# print ord(u'\u2020')

# a=str(' 12')

# b=int(a)

# print   a,b

def any(iterable):

    for element in iterable:

        if element:

            print 'true'

            return True

    print 'false'

    return False

# any([''])

# x=123

# print eval('3+x')

# y=1

# # print isinstance(y,str)

# print isinstance(1,(str,int,list))

#the different of isinstance and type

class A:

    pass

class B(A):

    pass

# print isinstance(A(),A)

# print type(A()) == A

# print isinstance(B(),A)

# print type(B())==A

# print issubclass(A,B)   #返回false

# print issubclass(B,A)   #返回true,类B是参数类A的子集  类A必须先于类B存在

# print pow(9,3,5) #计算9的3次方后的值除以5取余数（取模）

# print sum([1,2,3],9)    #求和，相对于 1+2+3+9

# # print sum(1,3)    #报错：不是iterable

# # print sum(['a','b'])  #报错：迭代值不能为str类型

# print sum([1.22,2.33])  #求和

# print isinstance('hello',basestring)    #判断参数是否为str 或者Unicode类型 ，返回true

# print isinstance(1,basestring)  #返回false

# print isinstance(u'\u2020',basestring)  #参数为Uniexecfilecode类型，返回true

# #此处的if 注意缩进

#     if __name__== '__main__':

#         print sys.argv

#         print 'execfile'

#         sys.argv = 'appcfg.py update sdblog'.split();

#         print sys.argv

#         #execfile打开文件

#         execfile('main.py')

#super 调用父类并返回该父类实例的方法

class FooParent(object):

    def __init__(self):

        self.parent='I \'m the parent' #创建parent属性

        print 'Parent'

    def bar(self,message):

        print message,'from Parent'

class FooChild(FooParent):

    def __init__(self):

        super(FooChild,self).__init__()

        print 'Child'

    def bar(self,message):

        super(FooChild,self).bar(message)

        print 'Child bar function'

        print self.parent

# if __name__=='__main__':

#     fooChild=FooChild()

#     print '\n'

#     fooChild.bar('HelloWorld')

# print bin(12345)    #转换int类型为二进制

# # print bin('a')  #报错，不能传递str类型，只能传递int类型 参数

# # print bin(1.22)     #报错，不能传递float类型，只能传递int类型 参数

# f=file('test.txt')

# print f

# print f.read()

# with open('test.txt') as fp:

#     for line in iter(fp.readline,''):   #如果第一个参数不是可迭代的参数，则必须传递第二个参数

#         print line

#

# mylist=[1,2,3]

# for i in iter(mylist):

#     print i

class C(object):

    @classmethod

    def __call__(self):

        return 0

    def __init__(self):

        self._x='la la la'

    def getx(self):

        return self._x

    def setx(self,value):

        self._x=value

    def delx(self):

        del self._x

    def __dir__(self):

        self._x='aaa'

    x=property(getx,setx,delx,"i'm the 'x' property")

    y=property(getx)

    u = property(getx,setx)

# name=C()

# print dir(C)    #返回对象的属性、方法和列表

# myProperty=name.x

# print myProperty

# y=name.y

# print y

# u=name.u

# print u

# print vars(time)    #以字典形式打印出time模块对象

# print vars(C)     #类

# c=C()

# print vars(c)   #实例

# print C.__call__()   #@classmethod  修饰符修饰的函数不需要实例化

# print C().__call__()   #无@classmethod修饰符函数的调用

# myAttribute=name.getx()

# print myAttribute

# myList=[1,22,44]

# print tuple(myList)

# print tuple('abc')

# class bool():

#     de

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