【程式碼示例】re模組方法使用。

>>> import re

>>> text="172.0.0.1"

>>> print(re.split("[\.]+",text))#按照模式進行字串分割，此處按照“.”進行分割

['172', '0', '0', '1']

['today', 'is', 'sunday']

>>> import re

>>> text="today is sunday"

>>> print(re.findall("[a-zA-Z]+",text))#找出字串中所有單詞。

['today', 'is', 'sunday']

>>> import re

>>> text="Mr Wu is a handsome boy, he is cool, clever, and soon..."

>>> print(re.sub("\s+","-",text))#用“-”替換字串中所有的空白

Mr-Wu-is-a-handsome-boy,-he-is-cool,-clever,-and-so-on...

>>> import re

>>> text="ok or not ok, that is a question!"

>>>print(re.match

<_sre.SRE_Match object; span=(0, 1), match='o'>

>>> import re

>>> text="Ok or not ok, that is a question!"

>>>print(re.search("ok",text))#從整個字串去匹配，成功則返回macth物件，否#則為None

<_sre.SRE_Match object; span=(10, 12), match='ok'>

search方法需要區別於match方法，請仔細檢視下列例子，返回的則為None。

>>> import re

>>> text="Ok or not ok, that is a question!"

>>> print(re.match("ok",text))#該方法從開始進行匹配，不是從字串全部去匹配。

None

>>> import re

>>> text="https://www.baidu.com/*?()"

>>> print(re.escape(text))#對字串中所有特殊正則表示式字元進行轉義。

https\:\/\/www\.baidu\.com\/\*\?\(\)    #轉義後的字串