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\D- Matches any non-decimal digit. Equivalent to[^0-9] \s- Matches where a string contains any whitespace character. Equivalent to[ \t\n\r\f\v]. \S- Matches where a string contains any non-whitespace character. Equivalent to[^ \t\n\r\f\v]. \w- Matches any alphanumeric character...
To removenon-alphanumericcharacters, i.e. all characters except letters and digits: Pattern: [^0-9a-zA-Z]+ To purge all charactersexcept letters,digitsandspaces: Pattern: [^0-9a-zA-Z ]+ To delete all charactersexcept letters,digitsandunderscore, you can use \W that stands for any charac...
In this example, we define a function clean_data that takes a string of data as input and removes any non-alphanumeric characters using a regex pattern. The pattern r'[\W_]+’ matches one or more non-alphanumeric characters or underscores. The re.sub function substitutes matches of the p...
When theLOCALEandUNICODEflags are not specified, matches any non-alphanumeric character; this is equivalent to the set[^a-zA-Z0-9_]. WithLOCALE, it will match any character not in the set[0-9_], and not defined as alphanumeric for the current locale. IfUNICODEis set, this will match...
In this example, we will use the[\b\W\b]+regex pattern to cater to any Non-alphanumeric delimiters. Using this pattern we can split string by multiple word boundary delimiters that will result in a list of alphanumeric/word tokens. ...
\S - Matches where a string contains any non-whitespace character. Equivalent to [^ \t\n\r\f\v]. ExpressionStringMatched? \S a b 2 matches (at a b) No match \w - Matches any alphanumeric character (digits and alphabets). Equivalent to [a-zA-Z0-9_]. By the way, underscore _...
[ Character set. Match any character in the set. A-Z Range. Matches a character in the range "A" to "Z" (char code 65 to 90). Case sensitive. ] ) \w Word. Matches any word character (alphanumeric & underscore). + Quantifier. Match 1 or more of the preceding token....
any non-alphanumeric character. :s any blank space character. :S any character other than a blank. :| Vertical bar :^ Caret :$ Dollar sign :( Left parenthesis :) Right parenthesis :< Greater than :> Less than :[ Left bracket
[[:alpha:]] 任何字母 [[:digit:]] 任何数字 [[:alnum:]] 任何字母和数字 [[:space:]] 任何白字符 [[:upper:]] 任何大写字母 [[:lower:]] 任何小写字母 [[:punct:]] 任何标点符号 [[:xdigit:]] 任何16进制的数字,相当于[0-9a-fA-F] ...