Python learning regular expression re module

The regular expression uses the RE module

Import re to begin calling the regular expression.

The usual regular has the following characters:.  ^  $  *  + ?  {}   []   \   | ()

.       matches any character other than \ n, and can match line breaks in Dotall mode. ^     matches the beginning of the string, matching the beginning of each line in multiline mode. [^]   matches content that does not contain certain strings. $      matches the content that ends with a string. *       matches 0 or more arbitrary characters. +      matches 1 or more arbitrary characters.      matches 0 or 1 arbitrary characters. {}      matching content can be similar to   *  + &nbsp, like:             {0,}  ==  *             {1,}  == +                     {0,1} == ?             {m,n}  matches the previous character M~n times.             {m}     matches the previous character m times. []      character set, the corresponding position can be in the character setAny character in a character set can be listed as a group, or it can be given a range, such as [ABC] or [A-c].          the first character, if it is ^, is reversed, such as  [^abc]  means other characters that are not ABC. \      the escape character so that the latter character becomes the original meaning. |       represents an arbitrary match between the left and right expressions. ( )      the enclosed expression as a grouping, starting from the left side of the expression to encounter each grouping of the opening parenthesis ' (', number +1.   Another grouping expression as a whole,         can be followed by a number of words. The |  in an expression is only valid in that group. (? P<name&gt, ...)      Group, specify an additional alias in addition to the original number.      (? P&LT;ID&GT;ABC) {2}

\d: Matches any decimal number equal to [0-9]

\d: Matches any non-numeric character equivalent to [0-9]

\s: Matches any white space character, equivalent to [\t\n\r\f\v]

\s: Matches any non-whitespace character equivalent to [^\t\n\r\f\v]

\w: Matches any alphanumeric character, equivalent to [a-za-z0-9]

\w: Matches any non-alphanumeric character equivalent to [^a-za-z0-9]

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Python learning regular expression re module