13-python-字符串格式化

1、字符串格式化

　　+右对齐

　　-左对齐

# -*- coding:utf-8 -*-
name = "zf"
print("我是%s" % name)

# ----------
p = 99.9784224
print("percent %.2f" % p)

# ---------
p = 99.9734224
print("percent %.2f%%" % p)
# ---------
tp = "I am %(name)s age is %(age)d" % {"name": "zf", "age": 18}
print(tp)

 2、字符串format格式化

　　常用格式

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