Tuenti ejercicio 1

gistfile1.py

import re
from operator import add, mul, sub
import sys

ops = {'=':  add, '@': sub, '#': mul }

r = '\^(.)\s*(\-?\d+)\s*(\-?\d+)\$'

def e(g):
    g = g.groups()
    return str(ops[g[0]](*map(int, g[1:])))

def parse(exp):
    while '^' in exp:
        exp = re.sub(r, e, exp)
    return exp

if __name__ == '__main__':
    for x in ' '.join(sys.argv[1:]).split('\n'):
        print parse(x)

te lo acabo de forkear con trucos de perro viejo XD