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开始学习

问题		答案
Returns a list containing all matches 开始学习		findall
Returns a Match object if there is a match anywhere in the string 开始学习		search
Returns a list where the string has been split at each match 开始学习		split
Replaces one or many matches with a string 开始学习		sub
Every character from the set. 开始学习		[] "[a-m]"
Signals a special sequence (can also be used to escape special characters) 开始学习		\ "\d"
Any character (except newline character) 开始学习		. "he... o"
Starts with 开始学习		^ "^hello"
Ends with 开始学习		$ "world$"
Zero or more occurrences 开始学习		* "aix*"
One or more occurrences 开始学习		+ "aix+"
Exactly the specified number of occurrences 开始学习		{} "al{2}"
Either or 开始学习		\| "falls\|stays"
Capture and group 开始学习		()

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