字符串拼接

msg = 'I am my hobby is %s' %'asd'

多个

msg = 'I am %s  my hobby is %s' %('asd' ''wer'）

 

%s  字符串

%d  整形数字

%f  浮点数

保留几位  %.3s 

保留几位小数  %.2f

 

name = ‘Alex’

age  =  23

msg = ‘name 是 %s ,年纪是%d’ %(name,age)

"name is %(name)s ,age is %(age)d" %{'name':'ad','age':23}

 

tpl = "1 am {},afe {}".format(1,2)

tpl = "i am {}, age {}, {}".format("seven", 18, 'alex')

  

tpl = "i am {}, age {}, {}".format(*["seven", 18, 'alex'])

  

tpl = "i am {0}, age {1}, really {0}".format("seven", 18)

  

tpl = "i am {0}, age {1}, really {0}".format(*["seven", 18])

  

tpl = "i am {name}, age {age}, really {name}".format(name="seven", age=18)

  

tpl = "i am {name}, age {age}, really {name}".format(**{"name": "seven", "age": 18})

  

tpl = "i am {0[0]}, age {0[1]}, really {0[2]}".format([1, 2, 3], [11, 22, 33])

  

tpl = "i am {:s}, age {:d}, money {:f}".format("seven", 18, 88888.1)

  

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

  

tpl = "i am {name:s}, age {age:d}".format(name="seven", age=18)

  

tpl = "i am {name:s}, age {age:d}".format(**{"name": "seven", "age": 18})

 

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

 

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

 

tpl = "numbers: {0:b},{0:o},{0:d},{0:x},{0:X}, {0:%}".format(15)

 

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