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python(python是做什么的)

python, python格式函數(shù)的用法是什么?不知道小伙伴們今天來(lái)看看邊肖的分享吧!

python格式函數(shù)用法詳解:

1.位置

Print (Hello {0}, I am {1} . format (World, python)) # Fill in according to the position subscript.

Print (Hello {}, I'm {) . Format (World, python)) # Automatically fill in according to the order.

Print (Hello {0}, this is {1}. {1} is a new language . format (World, python)) # The same parameter can be filled in multiple times.

輸出:

hello world, this is python.

hello world, this is python.

hello world, this is python. python is a new language.

2. Keys

obj=world

name=python

print(hello {obj}, this is {name}.format(obj=obj, name=name))

輸出:

hello world, this is python.

python是做什么的

3.目錄

list=[world, python]

print(hello {names[0]}, this is {names[1]}.format(names=list))

輸出:

hello world, this is python.

4.詞典

dict={obj:world, name:python}

print(hello {names[obj]}, this is {names[name]}.format(names=dict))

輸出:

hello world, this is python.

注意:

訪問(wèn)不帶引號(hào)的字典鍵。

5.類別屬性

class Names():

obj=world

name=python

print(hello {names.obj}, this is {names.name}.format(names=Names))

輸出:

hello world, this is python.

6.神奇參數(shù)

args=[, inx]

kwargs={obj: world, name: python}

print(hello {obj}{} this is {name}.format(*args, **kwargs))

輸出:

hello world, this is python.

注意:

這里的格式(*args,**kwargs)等價(jià)于格式(,inx,obj=world,name=python)。

第二,數(shù)字格式化

python是做什么的

第三,其他用法

1.逃跑

print({{hello}} {{{0}}}.format(world))

輸出:

{hello} {world}

2.格式化為函數(shù)變量。

name=python

hello=hello, welcome to {} world!format

print(hello(name))

輸出:

hello, welcome to python world!

3.格式化數(shù)據(jù)時(shí)間

from datetime import datetime

now=datetime.now()

print({:%Y-%m-%d %X}.format(now))

輸出:

2020-12-15 19:46:24

4.{}嵌入{}

print(hello {0:{1}} .format(world, 10))

輸出:

hello world

python是做什么的

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