python格式化输入包含'%'调用，及format方法
使用‘%’进行格式化输出
1 #最简单的字符串传参 2 tpl='i am %s '%'alex' 3 >>>i am alex 4 5 #字符串与整数传参 6 tpl = 'i am %s age %d'%('alex',18) 7 >>>i am alex age 18 8 9 #字典的传参 10 tpl = 'i am %(name)s age %(age)d'%{'name':'alex','age':18} 11 >>>i am alex age 18 12 13 #浮点型传参 14 tpl = 'percent %.2f'%99.97623 15 >>>percent 99.98 16 17 #字典中的浮点调用 18 tpl = 'i am %(pp).2f'%{'pp':123.42556} 19 >>>i am 123.43 20 21 #注意点：表示百分号的时候需要加个% 22 tpl = 'i am %.2f %%'%123.425556 23 >>>i am 123.43 % 24 25 #错误的方式 26 tpl = 'i am %.2f %'%123.425556 27 >>> tpl = 'i am %.2f %'%123.425556 28 >>>ValueError: incomplete format
format方法格式化输入
1 #format方法顺序对应传参 2 tpl = 'i am {},age{},{}'.format('serven',18,'alex') 3 >>>i am serven,age18,alex 4 5 #format列表传参*号为将列表分割后顺序传入，不加则会将整个传入而报错 6 tpl = 'i am {},age{},{}'.format(*['serven',18,'alex']) 7 >>>i am serven,age18,alex 8 9 #format标序传参 10 tpl = 'i am {0},age {1},really {0}'.format('serven',18) 11 >>>i am serven,age 18,really serven 12 13 #format指定参数名传参 14 tpl = 'i am {name},age {age},really {name}'.format(name='seven',age=18) 15 >>>i am seven,age 18,really seven 16 17 #format标序后指定下标传参 18 tpl = 'i am {0[0]},age{0[1]},really{0[2]}'.format([1,2,3],[11,22,33]) 19 >>>i am 1,age2,really3 20 21 #对应顺序传参，f整数转为浮点型小数点后保留6位 22 tpl = 'i am {:s},age{:d},money {:f}'.format('seven',18,88888.1) 23 >>>i am seven,age18,money 88888.100000 24 25 #format 字典传参 26 tpl = 'i am {name:s},age{age:d}'.format(**{'name':'seven','age':18}) 27 >>>i am seven,age18 28 29 #:b转化为2进制，:o转化为8进制：x转化为16进制小写，：X转化为16进制大写:%将值转化为百分比 30 tpl = 'numbers : {:b},{:o},{:d},{:x},{:X},{:%}'.format(15,15,15,15,15,15.87623,2) 31 >>>numbers : 1111,15,15,f,F,1587.623000%