13-python-字符串格式化

1、字符串格式化

　　+右对齐

　　-左对齐

 1 # -*- coding:utf-8 -*-
 2 name = "zf"
 3 print("我是%s" % name)
 4 
 5 # ----------
 6 p = 99.9784224
 7 print("percent %.2f" % p)
 8 
 9 # ---------
10 p = 99.9734224
11 print("percent %.2f%%" % p)
12 # ---------
13 tp = "I am %(name)s age is %(age)d" % {"name": "zf", "age": 18}
14 print(tp)

2、字符串format格式化

　　常用格式

 1 # -*- coding:utf-8 -*-
 2 tp = "I am {} age is {} ".format("zf", 18)  # 默认元组
 3 print(1, tp)
 4 tp = "I am {name:s} age is {age} ".format(name="zf", age=18)
 5 print(2, tp)
 6 tp = "I am {name} age is {age} ".format(**{"name": "zf", "age": 18})
 7 print(3, tp)
 8 tp = "I am {:s} age is {:d} ".format("zf", 18)
 9 print(4, tp)
10 tp = "I am {1:d} age is {0:s} ".format(*["zf", 18])
11 print(5, tp)
12 l = ["zf", 18]
13 tp = "I am {1:d} age is {0:s} ".format(*l)
14 print(6, tp)