1.内置函数

 #!/usr/bin/env python

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

 # print(abs(-1))

 # print(abs(1))

 #

 # print(all([1,2,'1']))

 # print(all([1,2,'1','']))

 # print(all(''))

 # print(any([0,'']))

 # print(any([0,'',1]))

 # print(bin(3))

 #空，None，0的布尔值为False，其余都为True

 # print(bool(''))

 # print(bool(None))

 # print(bool(0))

 name='你好'

 # print(bytes(name,encoding='utf-8'))

 # print(bytes(name,encoding='utf-8').decode('utf-8'))

 #

 # print(bytes(name,encoding='gbk'))

 # print(bytes(name,encoding='gbk').decode('gbk'))

 #

 # print(bytes(name,encoding='ascii'))#ascii不能编码中文

 # print(chr(46))

 # print(dir(dict))

 #

 # print(divmod(10,3))

 # dic={'name':'alex'}

 # dic_str=str(dic)

 # print(dic_str)

 #可hash的数据类型即不可变数据类型，不可hash的数据类型即可变数据类型

 # print(hash('12sdfdsaf3123123sdfasdfasdfasdfasdfasdfasdfasdfasfasfdasdf'))

 # print(hash('12sdfdsaf31231asdfasdfsadfsadfasdfasdf23'))

 #

 # name='alex'

 # print(hash(name))

 # print(hash(name))

 #

 #

 # print('--->before',hash(name))

 # name='sb'

 # print('=-=>after',hash(name))

 # print(help(all))

 # print(bin(10))#10进制->2进制

 # print(hex(12))#10进制->16进制

 # print(oct(12))#10进制->8进制

 # print(isinstance(1,int))

 # print(isinstance('abc',str))

 # print(isinstance([],list))

 # print(isinstance({},dict))

 # print(isinstance({1,2},set))

 name='哈哈哈哈哈哈哈哈哈哈哈哈哈哈啊哈粥少陈'

 # print(globals())

 # print(__file__)

 #

 # def test():

 #     age='1111111111111111111111111111111111111111111111111111111111111'

 #     print(globals())

 #     print(locals())

 #

 # test()

 # l=[1,3,100,-1,2]

 # print(max(l))

 # print(min(l))

 #

 #

 # print(list(zip(('a','n','c'),(1,2,3))))

 # print(list(zip(('a','n','c'),(1,2,3,4))))

 # print(list(zip(('a','n','c','d'),(1,2,3))))

 #

 p={'name':'alex','age':18,'gender':'none'}

 # print(list(zip(p.keys(),p.values())))

 # print(list(p.keys()))

 # print(list(p.values()))

 #

 # print(list(zip(['a','b'],'12345')))

 # l=[1,3,100,-1,2]

 # print(max(l))

 # print(min(l))

 age_dic={'alex_age':18,'wupei_age':20,'zsc_age':100,'lhf_age':30}

 # print(max(age_dic.values()))

 #

 # #默认比较的是字典的key

 # print(max(age_dic))

 #

 # for item in zip(age_dic.values(),age_dic.keys()): #[(18,'alex_age')  (20,'wupeiqi_age') () () ()]

 #     print(item)

 #

 # print('=======>',list(max(zip(age_dic.values(),age_dic.keys()))))

 # l=[

 #     (5,'e'),

 #     (1,'b'),

 #     (3,'a'),

 #     (4,'d'),

 # ]

 # l1=['a10','b12','c10',100] #不同类型之间不能进行比较

 l1=['a10','a2','a10'] #不同类型之间不能进行比较

 # print(list(max(l1)))

 # print('--->',list(max(l1)))

 # l=[1,3,100,-1,2]

 # print(max(l))

 dic={'age1':18,'age2':10}

 # print(max(dic)) #比较的是key

 # print(max(dic.values())) #比较的是key，但是不知道是那个key对应的

 # print(max(zip(dic.values(),dic.keys()))) #结合zip使用

 #

 #

 people=[

     {'name':'alex','age':1000},

     {'name':'wupei','age':10000},

     {'name':'yuanhao','age':9000},

     {'name':'linhaifeng','age':18},

 ]

 # max(people,key=lambda dic:dic['age'])

 # print('周绍陈取出来没有',max(people,key=lambda dic:dic['age']))

 # ret=[]

 # for item in people:

 #     ret.append(item['age'])

 # print(ret)

 # max(ret)

 # print(chr(97))

 # print(ord('a'))

 # print(pow(3,3))  #3**3

 # print(pow(3,3,2))  #3**3%2

 # l=[1,2,3,4]

 # print(list(reversed(l)))

 # print(l)

 #

 # print(round(3.5))

 # print(set('hello'))

 # l='hello'

 # s1=slice(3,5)

 # s2=slice(1,4,2)

 # print(l[3:5])

 # print(l[s1])

 # print(l[s2])

 # print(s2.start)

 # print(s2.stop)

 # print(s2.step)

 l=[3,2,1,5,7]

 l1=[3,2,'a',1,5,7]

 # print(sorted(l))

 # print(sorted(l1)) #排序本质就是在比较大小，不同类型之间不可以比较大小

 # people=[

 #     {'name':'alex','age':1000},

 #     {'name':'wupei','age':10000},

 #     {'name':'yuanhao','age':9000},

 #     {'name':'linhaifeng','age':18},

 # ]

 # print(sorted(people,key=lambda dic:dic['age']))

 name_dic={

     'abyuanhao': 11900,

     'alex':1200,

     'wupei':300,

 }

 print(sorted(name_dic))

 #

 # print(sorted(name_dic,key=lambda key:name_dic[key]))

 #

 # print(sorted(zip(name_dic.values(),name_dic.keys())))

 # print(str('1'))

 # print(type(str({'a':1})))

 # dic_str=str({'a':1})

 # print(type(eval(dic_str)))

 # l=[1,2,3,4]

 # print(sum(l))

 # print(sum(range(5)))

 #

 #

 # print(type(1))

 #

 # msg='123'

 #

 # if type(msg) is str:

 #     msg=int(msg)

 #     res=msg+1

 #     print(res)

 # def test():

 #     msg='撒旦法阿萨德防撒旦浪费艾丝凡阿斯蒂芬'

 #     print(locals())

 #     print(vars())

 # test()

 # print(vars(int))

 #import------>sys----->__import__()

 # import test

 # test.say_hi()

 # import 'test'#报错

 module_name='test'

 m=__import__(module_name)

 m.say_hi()

2.文件处理读操作

 #!/usr/bin/env python

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

 # f=open('陈粒',encoding='utf-8')

 # data=f.read()

 # print(data)

 # f.close()

 #

 # f=open('xxx')

 # data=f.read()

 # print(data)

 #r w a

 f=open('陈粒','r',encoding='utf-8')

 # data=f.read()

 # print(data)

 # print(f.readable())

 # print('第1行',f.readline(),end='')

 # print('第2行',f.readline())

 # print('第3行',f.readline())

 # # for i in range(1):

 # #     pass

 # print('第4行',f.readline())

 # print('第5行',f.readline())

 # print('第6行',f.readline())

 # print('第7行',f.readline())

 data=f.readlines()

 print(data)

 f.close()

3.文件处理写操作 不追加

 #!/usr/bin/env python

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

 f=open('陈粒','w',encoding='utf8')

 # f.read()

 f.write('11111111\n')

 f.write('222222222\n')

 f.write('333\n4444\n555\n')

 # f.writable()

 # f.writelines(['555\n','6666\n'])

 # f.writelines(['555\n','6666\n',1]) # 文件内容只能是字符串，只能写字符串

 f.close()

4.文件处理写操作 追加

 #!/usr/bin/env python

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

 f=open('陈粒','a',encoding='utf-8')

 f.write('写到文件最后')

5.文件处理其他模式

 #!/usr/bin/env python

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

 # f=open('陈粒','r+',encoding='utf-8')

 # data=f.read()

 # print(data)

 # f.write('123sb')

 #

 #

 #

 # f.write('sb')

 #文件修改

 # src_f=open('陈粒','r',encoding='utf-8')

 # data=src_f.readlines()

 # src_f.close()

 # #

 # for i in data:

 #     print(i)

 # print(data)

 # dst_f=open('陈粒','w',encoding='utf-8')

 # data=dst_f.readlines()

 # dst_f.writelines(data)

 # dst_f.write(data[0])

 # dst_f.close()

 # with open('陈粒.txt','w') as f:

 #     f.write('1111\n')

 # src_f=open('陈粒.txt','r',encoding='utf-8')

 # dst_f=open('混吧','w',encoding='utf-8')

 # with open('陈粒.txt','r',encoding='utf-8') as src_f,\

 #         open('混吧','w',encoding='utf-8') as dst_f:

 #     data=src_f.read()

 #     dst_f.write(data)

 # f=open('陈粒.txt')

 # print(f.encoding) #查看文件编码

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