You can complement (invert) the character set by using caret ^ symbol at the start of a square-bracket.[^abc] means any character except a or b or c. [^0-9] means any non-digit character.. - PeriodA period matches any single character (except newline '\n').ExpressionStringMatched?
You can group multiple patterns to match or substitute in a string using the square bracket. In fact, we did this when we matched capital and small letters. Let's group multiple punctuation marks and remove them from a string: text="The film, '@Pulp Fiction' was ? released _ in % $ ...
Backlash\is used to escape various characters including all metacharacters. For example, \$amatch if a string contains$followed bya. Here,$is not interpreted by a RegEx engine in a special way. If you are unsure if a character has special meaning or not, you can put\in front of it. T...
matches_complement = re.findall(pattern_complement, text_complement) print("补全字符集匹配结果:", matches_complement) # 示例:在字符集中匹配字面的 ']' pattern_bracket = r'[\]]' # 匹配右括号或左括号 text_bracket = "([])" matches_bracket = re.findall(pattern_bracket, text_bracket) print...
All the functions shown below, with the exception of re.escape(), support the <flags> argument in the same way. You can specify <flags> as either a positional argument or a keyword argument: Python re.search(<regex>, <string>, <flags>) re.search(<regex>, <string>, flags=<flags>...
matches_complement = re.findall(pattern_complement, text_complement) print("补全字符集匹配结果:", matches_complement) # 示例:在字符集中匹配字面的 ']' pattern_bracket = r'[\]]' # 匹配右括号或左括号 text_bracket = "([])" matches_bracket = re.findall(pattern_bracket, text_bracket) ...
The character class sequences \w, \W, \d, \D, \s, and \S can appear inside a square bracket character class as well:Python >>> re.search('[\d\w\s]', '---3---') <_sre.SRE_Match object; span=(3, 4), match='3'> >>> re.search('[\d\w\s]', '---a---') <...
str1 ="Emma is a Python developer. Emma salary is 5000$. Emma also knows ML and AI."# escape dotres = re.findall(r"\.", str1) print(res)# Output ['.', '.', '.'] Run The[]square brackets metacharacter The square brackets are beneficial when used in the regex pattern because...
to match a single digit we can use the regex[0123456789]. For convenience we can specify a range of characters using a hyphen, so the regex[0-9]also matches a digit. It is possible to negate the meaning of a character class by following the opening bracket with a caret, so[^0-9]ma...
[,@python--treesit-operators] @font-lock-operator-face) :feature 'bracket :language 'python '(["(" ")" "[" "]" "{" "}"] @font-lock-bracket-face) :feature 'delimiter :language 'python '(["," "." ":" ";" (ellipsis)] @font-lock-delimiter-face) :feature 'variabl...