标签：常用 lov 浮点数 基础学习 八进制 数位 默认 class nan
一、%百分号_字符串格式化
1、%s替换所有数据类型
name="I am %s my %s is %s"%("lucy","name","cc") name1="I am %s my %s is %s"%("lucy","name",[1,2]) print(name) print(name1) 结果： I am lucy my name is cc I am lucy my name is [1, 2]
2、%d替换数字
name="I am %s my %s is %d"%("lucy","age",12) name1="nana" age=19 name1="my %s is %s"%(name1,age) print(name) print(name1) 结果： I am lucy my age is 12 my nana is 19
3、%f打印浮点数
nums="percent %f"%99.2345654345 #默认小数位后6位 print(nums) 结果： percent 99.234565
4、截取字符串位数%.2s
nums="单词 %.3s"%"abnfdhfjfj" #截取字符串3位 print(nums)
结果：
单词 abn
5、打印百分比%.2f
nums="%.2f%%"%99.24356754334 #百分比数字，保留小数位后2位 print(nums) 结果： 99.24%
6、各%百分号常用格式练习
tp2="I am %(name)s age is %(age)d"% {"name":"Lucy","age":18} print(tp2) 结果： I am Lucy age is 18
tp3="I am %(pp).2f%%"%{"pp":123.3344465,} print(tp3) 结果 I am 123.33%
二、format—字符串格式化
1、{}顺序格式化
tp2="I am {},age is {},{}".format("six",18,"cc") print(tp2)
方式二：
tp2="I am {},age is {},{}".format(*["six",18,"cc"])
print(tp2)
结果：
I am six,age is 18,cc
2、{1}包含指定下标顺序的格式化
方式一： tp2="I am {0},age is {1},{0}".format(*["six",18,"cc"]) print(tp2) 方式二： tp2="I am {0},age is {1},{0}".format("six",18,"cc") print(tp2) 结果： I am six,age is 18,six
3、{name}存放指定的key
tp2="I am {name},age is {age},love {name}".format(name="cc",age=18) tp3="I am {name},age is {age},love {name}".format(**{"name":"cc","age":18}) print(tp3) print(tp2) 结果： I am cc,age is 18,love cc
4、{key的索引[value的索引]}
tp2="I am {0[0]},age is {0[1]},love {1[2]}".format([1,2,3],[11,22,33]) print(tp2) 结果： I am 1,age is 2,love 33
5、{：s}替换任意数据格式
tp2="I am {:s},age is {:d},love you {:f}".format("six",18,88.2345222211654) tp3="I am {:s},age is {:d},love you {:f}".format(*["six",18,88.2345222211654]) print(tp2) print(tp3) 结果： I am six,age is 18,love you 88.234522
6、{name:s} ={key:获取任意数据格式}
tp2="I am {name:s},age is {age:d},love you {fox:f}".format(name="six",age=18,fox=88.2345222211654) tp3="I am {name:s},age is {age:d},love you {fox:f}".format(**{"name":"six","age":18,"fox":88.2345222211654}) print(tp2) print(tp3) 结果： I am six,age is 18,love you 88.234522
7、数字的几进制的转换，格式化
tp2="numbers:{:b},{:o},{:d},{:x},{:X},{:%}".format(15,15,15,15,15,15.345654345654,20) print(tp2) b二进制 o八进制 d数字 x小写十六进制 X大写十六进制 %百分比，默认是保留小数位6位 结果 numbers:1111,17,15,f,F,1534.565435%
标签：常用 lov 浮点数 基础学习 八进制 数位 默认 class nan
原文地址：https://www.cnblogs.com/xucuiqing/p/11546329.html
