When running rmlist, a SyntaxWarning is generated:
$ bin/rmlist -a test
/var/lib/mailman/bin/rmlist:131: SyntaxWarning: "\d" is an invalid escape sequence. Such sequences will not work in the future. Did you mean "\\d"? A raw string is also an option.
cre = re.compile('^heldmsg-%s-\d+\.(pck|txt)$' % re.escape(listname),
When running rmlist, a SyntaxWarning is generated: