4.3 Standard Module regsub

This module defines a number of functions useful for working with regular expressions (see built-in module regex).

Warning: these functions are not thread-safe.

sub(pat, repl, str)

Replace the first occurrence of pattern pat in string str by replacement repl. If the pattern isn't found, the string is returned unchanged. The pattern may be a string or an already compiled pattern. The replacement may contain references `\digit' to subpatterns and escaped backslashes.

gsub(pat, repl, str)

Replace all (non-overlapping) occurrences of pattern pat in string str by replacement repl. The same rules as for sub() apply. Empty matches for the pattern are replaced only when not adjacent to a previous match, so e.g. gsub('', '-', 'abc') returns '-a-b-c-'.

split(str, pat[, maxsplit])

Split the string str in fields separated by delimiters matching the pattern pat, and return a list containing the fields. Only non-empty matches for the pattern are considered, so e.g. split('a:b', ':*') returns ['a', 'b'] and split('abc', '') returns ['abc']. The maxsplit defaults to 0. If it is nonzero, only maxsplit number of splits occur, and the remainder of the string is returned as the final element of the list.

splitx(str, pat[, maxsplit])

Split the string str in fields separated by delimiters matching the pattern pat, and return a list containing the fields as well as the separators. For example, splitx('a:::b', ':*') returns ['a', ':::', 'b']. Otherwise, this function behaves the same as split.

capwords(s[, pat])

Capitalize words separated by optional pattern pat. The default pattern uses any characters except letters, digits and underscores as word delimiters. Capitalization is done by changing the first character of each word to upper case.