pytho-字符串 demo1.py demo2.py

#!/usr/bin/env python

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

print '%d'%520

print u'ascii码的65代表:%s'%(chr(65)) #内置方法执行的结果

print 'ascii码的65代表:%c'%(65) #%c 代表把它格式化为ascii

# print '1+1=%s'%(1+1)

# print '100*245=%d'%(100*245)

# print ord('A')

# print chr(65)

demo2.py

#!/usr/bin/env python

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

# print 'my name is %s'%'list'

# print 'my name is :{},age:{}'.format("list",20)

# print "::".format('list','rose','xiaoquan')

# print ''.format(4,5,6,name='list') #只要是多个 就一定要用逗号分隔开

# print ':'.format(name='list',age=20)

#name,age ='list',20

#print ':'.format(name='rose',age=20)

#print ''.format{'name':'list','age':20}

#print '%(name)s：%(age)s'%{'name':'list','age':20}

#print ':'.format({'name':'list','age':20})

# a ={'name':'list'}

# b ={'age':20}

# print '{[name]}:{[age]}'.format(a,b)

# print ':'.format({'name':'list','age':20},{'name':'rose','age':70})

#print '{[name]}'.format(dict(name='list')) #字典

print dict(name='list')

demo3.py

# print ':'.format(name,age)

# print '{}:{}'.format(name,age)

#!/usr/bin/env python

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

# name,age ='lsit',20

# print '{} is {} years old.'.format(name,age)

# print '{} is a girl'.format('小芳')

# print ' is years old.'.format(name='小芳',age=18)

# print 'open file name is :'.format(open('abc.txt','w')) #目前不要理他 open是用于打开文件对象 name是文件对象的属性 但是方法也是可以

print 'my name is : ok'.format('list') #指定一个宽度