# -*- coding: utf-8 -*-#python 27#xiaodeng#str.format格式化用法(通过{}来替代%)'''>>> help(format)Help on built-in function format in module __builtin__:format(...)    format(value[, format_spec]) -> string        Returns value.__format__(format_spec)    format_spec defaults to ""'''#1、通过位置：#字符串的format函数可以接受不限个参数，位置可以不按顺序。print 'name:{0},age:{1}'.format('xiaodeng',28)#name:xiaodeng,age:28print '{},{}'.format('xiaodeng',28)#xiaodeng,28#print '{},{},{}'.format('xiaodeng',28)'''Traceback (most recent call last):  File "C:\Users\Administrator\Desktop\新浪API\test.py", line 20, in 
     
          print '{},{},{}'.format('xiaodeng',28)IndexError: tuple index out of range'''#修改之:print '{1},{1},{0}'.format('xiaodeng',28)#28,28,xiaodeng#2、通过关键字参数：print '{name},{age}'.format(age=20,name='xiaodeng')#xiaodeng,20#3、通过对象属性：class Person():    def __init__(self,name,age):        self.name=name        self.age=age    def __str__(self):        return 'my name is {self.name},age is {self.age} years old'.format(self=self)print Person('xiaodeng',28)#my name is xiaodeng,age is 28 old#4、通过下标list=['xiaodeng',28]print '{0[0]},{0[1]}'.format(list)#xiaodeng,28;这里的0是默认的？？？#5、填充与对齐print '{:>8}'.format('125')#>右对齐，后面带宽度,
      <表示左对齐，^表示居中对齐。print '{:a>
       8}'.format('125')#默认空格填充，这里为a字母填充'''>>>     125aaaaa125>>> '''#6、精度和类型fprint '{:.2f}'.format(321.123)#321.12;其中.2表示长度为2的精度，f表示float类型#7、其他类型：#要就是进制了，b、d、o、x分别是二进制、十进制、八进制、十六进制。print '{:b}'.format(17)#10001print '{:d}'.format(17)#17print  '{:o}'.format(17)#21print  '{:x}'.format(17)#11#用，号还能用来做金额的千位分隔符。print '{:,}'.format(1234567890)#1,234,567,890#8、指定宽度print 'My name is {0:118}'.format('xiaodeng')#My name is xiaodeng