python的字串格式化有兩種方式: 百分號方式、format方式
1、百分號方式
%[(name)][flags][width].[precision]typecode
width 可選，占有寬度
.precision 可選，小數點後保留的位數
typecode 必選
常用格式
tpl = "i am %s
" % "
alex
"tpl = "
i am %s age %d
" % ("
alex
", 18)
tpl = "
i am %(name)s age %(age)d
" %
tpl = "
percent %.2f
" % 99.97623tpl = "
i am %(pp).2f
" %
tpl = "
i am %.2f %%
" %
2.format格式化
常用格式：
tpl = "i am {}, age {}, {}
".format("
seven
", 18, '
alex')
tpl = "
i am {}, age {}, {}
".format(*["
seven
", 18, '
alex'])
tpl = "
i am , age , really
".format("
seven
", 18)
tpl = "
i am , age , really
".format(*["
seven
", 18])
tpl = "
i am , age , really
".format(name="
seven
", age=18)
tpl = "
i am , age , really
".format(**)
tpl = "
i am , age , really
".format([1, 2, 3], [11, 22, 33])
tpl = "
i am , age , money
".format("
seven
", 18, 88888.1)
tpl = "
i am , age
".format(*["
seven
", 18])
tpl = "
i am , age
".format(name="
seven
", age=18)
tpl = "
i am , age
".format(**)
tpl = "
numbers: ,,,,,
".format(15, 15, 15, 15, 15, 15.87623, 2)
tpl = "
numbers: ,,,,,
".format(15, 15, 15, 15, 15, 15.87623, 2)
tpl = "
numbers: ,,,,,
".format(15)
tpl = "
numbers: ,,,,,
".format(num=15)
字串格式化 format
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