format

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tp1='i am {},age{},{}'.format("seven",18,'alex')#不一一对应会报错
print(tp1)

输出

i am seven,age18,alex

tp2='i am {},age{},{}'.format("seven",18)
print(tp2)

输出报错

IndexError: tuple index out of range

tp2='i am {2},age{1},{0}'.format("seven",18,'alex')
print(tp2)

输出

i am alex,age18,seven

tp2='i am {1},age{1}'.format("seven",18,'alex')
print(tp2)

输出

i am 18,age18

tp2='i am {name},age{age},really{name}'.format(name="seven",age=18)
print(tp2)

输出

i am seven,age18,reallyseven

tp2='i am {name},age{age},really{name}'.format(**{'name':"seven",'age':18})
print(tp2)

输出

i am seven,age18,reallyseven

tp1='i am {0[0]},age{0[1]},really{0[2]}'.format([1,2,3],[11,22,33])
print(tp1)

输出

i am 1,age2,really3

tp1='i am {:s},age{:d},really{:f}'.format("seven",18,88.7)
print(tp1)

输出

i am seven,age18,really88.700000

tp1='i am {name:s},age{age:d}'.format(name="seven",age=18)
print(tp1)

输出

i am seven,age18

tp1 = 'i am {name:s},age{age:d}'.format(**{'name': "seven", 'age': 18})
print(tp1)

输出

i am seven,age18

：b二进制　　：o八进制　　：d整　　：x十六进制　　：%显示百分比（默认小数点后六位）

多了可以少了不行

tp1 = 'nambers:{:b},{:o},{:d},{:x},{:x},{:%}'.format(15,15,15,15,15,15.87623,2)
print(tp1)

输出

nambers:1111,17,15,f,f,1587.623000%

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