gistfile1.py

#! /usr/bin/env python
#
# For Keri. There really isn't a generalizable way to go about this because the
# input has very specific rules. But here's a pretty typical way to do it.

from re import compile, split

RE_DELIMETERS = compile(r'[\/\s]+')
RE_NUMERIC = compile(r'^[0-9]+')
RE_BINARY_OPS = compile(r'^[\+\-]+')


def parse(string):
    values = split(RE_DELIMETERS, string)
    result = []
    for value in values:
        if RE_NUMERIC.match(value):
            result.append(bool(int(value)))
        elif RE_BINARY_OPS.match(value):
            result.extend([op == '+' for op in value])
        else:
            raise ValueError('Unrecognized value: %s' % value)
    return tuple(result)


assert parse('103 234 0 1') == (True, True, False, True)
assert parse('103') == (True,)
assert parse('+') == (True,)
assert parse('+/-') == (True, False)
assert parse('++--++') == (True, True, False, False, True, True)
assert parse('53/0 -+ 0/0/10/++/--') == \
    (True, False, False, True, False, False, True, True, True, False, False)