python基础09_字符串格式化

#!/usr/bin/env python
# coding:utf-8

# 不用format方法，使用%s 和%d

name = ‘Tom‘
age = 100

msg = "%s is a good man, 你可以活到 %d 岁." % (name,age) # %d 只能传数字，所以用%s 最方便
print(msg)

# 对字符串截取
title = "全国各省市平均物价上涨了30%"
ms = "今天的重要新闻是：%.9s" % title  # 截取了9位，可以用来控制长度
print(ms)

# 打印浮点数
tpl = "今天收到了%.2f 块钱" % 99.325452 #只保留2位小数且四舍五入
print(tpl)

# 打印百分比 用%%
tpl = "已完成%.2f%% " % 99.325452 #只保留2位小数且四舍五入
print(tpl)

# 使用传字典的方式
tmp = "I am %(name)s age %(age)d" % {"name":‘Elly‘,‘age‘:88}
print(tmp)

tp = "I am \033[45;1m%(name)+20s\033[0m age %(age)d" % {"name":‘Elly‘,‘age‘:88}
print(tp)

print(‘root‘,‘x‘,‘0‘,‘0‘,sep=‘:‘)

#!/usr/bin/env python
# coding:utf-8


tpl = ‘I am {name}, age {age}, really {name}‘.format(name=‘Tom‘, age=22) # 传Key
print(tpl)

tpl = ‘I am {name}, age {age}, really {name}‘.format(**{‘name‘:‘Jerry‘, ‘age‘:33}) # 传字典 两星号相当于将字典转换成上面那行的格式。
print(tpl)

tpl = ‘I am {0[0]}, age {1[0]}, really {1[2]}‘.format([1,2,3],[11,22,33]) # 传列表
print(tpl)

tpl = ‘I am {:s}, age {:d}, really {:f}‘.format(‘Sen‘,18,88.999) #传字典
print(tpl)

## 本次参考：http://www.cnblogs.com/wupeiqi/articles/5484747.html

l = ["seven", 18]
tpl = "i am {:s}, age {:d}".format(*l) # 星号代表将列表中的元素遍历出来后再传入
print(tpl)

tpl = "numbers: {:b},{:o},{:d},{:x},{:X}, {:%}".format(15, 15, 15, 15, 15, 15.87623, 2)
print(tpl)