pattern_case_insensitive = r'hello'match_case_insensitive = re.search(pattern_case_insensitive, text, re.IGNORECASE)if match_case_insensitive:print(f"Ignore case match: {match_case_insensitive.group()}")# 多行模式下的匹配 multi_line_text = """First line Second line Third line"""pattern_...
- **使用标志**：通过传递额外的标志参数给 `re` 函数，可以增强正则表达式的灵活性。例如，`re.IGNORECASE` 忽略大小写，`re.MULTILINE` 使 `^` 和 `$` 匹配每一行的开头和结尾。case_insensitive_match = re.search(r'the', text, re.IGNORECASE)print(f"Case-insensitive match: {'Found' if case_i...
$ ./case_insensitive.py dog matches Dog matches DOG matches Doggy matches All four words match the pattern. AlternationsThe alternation operator | creates a regular expression with several choices. alternations.py #!/usr/bin/python import re words = ("Jane", "Thomas", "Robert", "Lucy", "...
目标-C: NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"\\([^()]*\\)" options:NSRegularExpressionCaseInsensitive error:&error]; NSString *modifiedString = [regex stringByReplacingMatchesInString:string options:0 range:NSMakeRange(0, [string length]) withTemplate:@...
7. Regular Expression Modifiers: Option flags You can provide multiple modifiers using exclusive OR (|). 1 2 3 4 5 6 7 8 9 re.I #Performs case-insensitive matching. re.L #Interprets words according to the current locale. re.M #Makes $ match the end of a line #(not just the end...
44. Case-insensitive Replace Write a Python program to do case-insensitive string replacement. Click me to see the solution 45. Remove ANSI Sequences Write a Python program to remove ANSI escape sequences from a string. Click me to see the solution ...
Display debug information about compiled expression. re.I re.IGNORECASE Perform case-insensitive matching; expressions like[A-Z]will match lowercase letters, too. This is not affected by the current locale. re.L re.LOCALE Make\w,\W,\b,\B,\sand\Sdependent on the current locale. ...
re.IGNORECASEre.ICase-insensitive matchingTry it » re.MULTILINEre.MReturns only matches at the beginning of each lineTry it » re.NOFLAGSpecifies that no flag is set for this pattern re.UNICODEre.UReturns Unicode matches. This is default from Python 3. For Python 2: use this flag to...
I IGNORECASE Perform case-insensitive matching. L LOCALE Make \w, \W, \b, \B, dependent on the current locale. M MULTILINE "^" matches the beginning of lines (after a newline) as well as the string. "$" matches the end of lines (before a newline) as well ...
正则表达式(regular expression,简称regex),是一种字符串匹配的模式(pattern),是文本处理方面功能最强大的工具之一,主要用来完成文本的搜索、替换等操作。广泛运用于PHP、C# 、Java、C++ 、Perl 、VBScript 、Javascript、以及Python等,在代码中常简写为regex、regexp或re。