One of the nice things one can do with Perl's regexp's is illustrated in the following example:
my $gly = qr/gg[ucag]/i my $ala = qr/gc[ucag]/i; my $val = qr/gu[ucag]/i; my $leu = qr/uu[ag]|cu[ucag]/i; my $ile = qr/au[uca]/i; my $aliphatic = qr/$gly|$ala|$val|$leu|$ile/; In other words, one can build regular expressions by re-combining other regular expressions. Is there a way to do this with Python's regexps? TIA! kynn -- http://mail.python.org/mailman/listinfo/python-list
