day9 字符串格式化输出 % .format()

常用的格式化输出方式1

  % 方式

1 print("i am %s my hobby is %s" %("yt","eat"))

  打印浮点数,.2表示保留两位。 %%表示打印0 “%” 号

1 print("percent %.2f %%" % 88.5464654)    # 结果:88.5464654%

  根据字典的键寻值输出

1 print("i am %(name)s my age is %(age)d" %{"name":"yangtuo","age":18})

 

format 方式拼接字符串

  不一一对应则报错

1 tpl = "i am {},age{},{}".format("yangtuo","18","tiancai")
2 print(tpl)

  列表元祖按照索引取值,可以不一一对应。直接传列表需要加一个 * 在写列表名

1 tpl = "i am {2},age{0},{1}".format("yangtuo","18","tiancai")
2 print(tpl)

  字典用keys来对应,字典必须要加两个 * 在写字典名

1 tpl = "i am {name},age{age},{sb}".format(**{"name":"yangtuo","age":18,"sb":"???"})
2 print(tpl)

  * 表示将内容遍历出来进行取值,:s :d 表示用字符串形式或者整型形式取值

1 tpl = "i am {:s}, age {:d}".format(*["seven", 18])
2 print(tpl)

   b 二进制 ,0 八进制,d 整型,x 16进制,X 大写的16进制,% 显示百分比

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

  sep="" 添加连接符给多个字符串拼接

1 print("root","x","0","0",sep=":")

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转载自www.cnblogs.com/shijieli/p/9686365.html
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