1、使用位置參數(shù)

>>> li = ['hoho',18]

>>>print( 'my name is {} ,age {}'.format('hoho',18))

?????? ?'my name is hoho ,age 18'

位置參數(shù)不受順序約束

?>>> 'my name is {1} ,age {0}'.format(10,'hoho')

???????? 'my name is hoho ,age 10'

>>> 'my name is {1} ,age {0} {1}'.format(10,'hoho')

??????? ?'my name is hoho ,age 10 hoho'

傳入位置參數(shù)列表可用*列表

?>>> 'my name is {} ,age {}'.format(*li)

???????? ?'my name is hoho ,age 18'

2、使用關(guān)鍵字參數(shù)

>>> hash = {'name':'hoho','age':18}

>>> 'my name is {name},age is {age}'.format(name='hoho',age=19)

??????? 'my name is hoho,age is 19'

可用字典當(dāng)關(guān)鍵字參數(shù)傳入值，字典前加**

>>> 'my name is {name},age is {age}'.format(**hash)

?????????'my name is hoho,age is 18'

3、填充與格式化

格式：‘{?索引:[填充字符][對齊方式][寬度] }’.format()

>>> '{0:*>10}'.format(1) ##右對齊 ,共占10個(gè)字符寬度

???????? '********11'

>>> '{:*>10}'.format(3,4,5)

???????? '*********3'

?>>> '{:*>10}{:*>10}{:*>10}'.format(3,4,5)

????????? '*********3*********4*********5'

>>> '{0:*<10}'.format(10) ##左對齊

?'10********'

>>> '{0:*^10}'.format(10) ##居中對齊

?'****10****'

?4、精度與進(jìn)制?

>>> '{0:.2f}'.format(1/3)??? #保留兩位小數(shù)

?????? '0.33'

>>> '{:,}'.format(12369132698) #千分位格式化

??????? ?' 12,369,132,698'

>>> '{0:b}'.format(10) #二進(jìn)制

?????? '1010'

>>> '{0:o}'.format(10) #八進(jìn)制

?????? ?'12'

>>> '{0:x}'.format(10) #16進(jìn)制

?????? ?'a'

5、使用索引

>>> li =['hoho', 18]

>>> 'name is {0[0]} age is {0[1]}'.format(li)?????? ???????

????? ?'name is hoho age is 18