Tuenti ejercicio 1

gistfile1.py

import re

OPERADORES = {'^=': lambda x,y: x+y,
              '^@': lambda x,y: x-y,
              '^#': lambda x,y: x*y}

OP_RE = r'(\^\=|\^\@|\^\#) (\-?\d+)( \-?\d+)?\$'

def componer(op):
    return '%s$' % ' '.join(op)

def operar(op):
    if len(op) == 2:
        return str(int(op[1]) * -1)
    return str(OPERADORES.get(op[0])(*map(int, op[1:])))

def main(input):
    for linea in lineas.split('\n'):
        remaining = True
        while remaining:
            match = re.search(OP_RE, linea)
            op = [m.strip() for m in match.groups() if m]
            linea = linea.replace(componer(op), operar(op))
            try:
                resultado = int(linea)
                remaining = False
            except:
                pass
        print resultado

lineas = """^= ^# ^# 75 208$ ^@ 86$$ 123$
^@ ^# 105 ^# 227 205$$$
^= 84 ^# 273 125$$
^# ^= 10 ^# 256 28$$ 162$
^= ^@ 101 4$ ^@ 268 43$$"""
        
if __name__ == '__main__':
    main(lineas)