diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/re.py | 16 |
1 files changed, 12 insertions, 4 deletions
@@ -29,7 +29,8 @@ concatenate ordinary characters, so last matches the string 'last'. The special characters are: "." Matches any character except a newline. "^" Matches the start of the string. - "$" Matches the end of the string. + "$" Matches the end of the string or just before the newline at + the end of the string. "*" Matches 0 or more (greedy) repetitions of the preceding RE. Greedy means that it will match as many repetitions as possible. "+" Matches 1 or more (greedy) repetitions of the preceding RE. @@ -37,7 +38,7 @@ The special characters are: *?,+?,?? Non-greedy versions of the previous three special characters. {m,n} Matches from m to n repetitions of the preceding RE. {m,n}? Non-greedy version of the above. - "\\" Either escapes special characters or signals a special sequence. + "\\" Either escapes special characters or signals a special sequence. [] Indicates a set of characters. A "^" as the first character indicates a complementing set. "|" A|B, creates an RE that will match either A or B. @@ -50,6 +51,10 @@ The special characters are: (?#...) A comment; ignored. (?=...) Matches if ... matches next, but doesn't consume the string. (?!...) Matches if ... doesn't match next. + (?<=...) Matches if preceded by ... (must be fixed length). + (?<!...) Matches if not preceded by ... (must be fixed length). + (?(id/name)yes|no) Matches yes pattern if the group with id/name matched, + the (optional) no pattern otherwise. The special sequences consist of "\\" and a character from the list below. If the ordinary character is not on the list, then the @@ -76,6 +81,7 @@ This module exports the following functions: subn Same as sub, but also return the number of substitutions made. split Split a string by the occurrences of a pattern. findall Find all occurrences of a pattern in a string. + finditer Return an iterator yielding a match object for each match. compile Compile a pattern into a RegexObject. purge Clear the regular expression cache. escape Backslash all non-alphanumerics in a string. @@ -83,8 +89,10 @@ This module exports the following functions: Some of the functions in this module takes flags as optional parameters: 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 as well as the string. - "$" matches the end of lines as well as the string. + M MULTILINE "^" matches the beginning of lines (after a newline) + as well as the string. + "$" matches the end of lines (before a newline) as well + as the end of the string. S DOTALL "." matches any character at all, including the newline. X VERBOSE Ignore whitespace and comments for nicer looking RE's. U UNICODE Make \w, \W, \b, \B, dependent on the Unicode locale. |