Revision history [back]

For others that stumble across this question, you can turn the Sage preparser off by calling preparser(False). Then the code above works just fine at the Sage command line:

sage: preparser(False)
sage: import re
sage: ST = "foobarsws"
sage: matches = re.match("(?:foo)?(bar)?(sws)?",ST)
sage: matches.groups()
('bar', 'sws')
sage: matches.group()
'foobarsws'
sage: matches.group(0)
'foobarsws'
sage: matches.group(1)
'bar'