gistfile1.pyw

import subprocess as sp

def instalados():
    proceso = sp.Popen('pkg_info', stdout=sp.PIPE)
    lineas = proceso.communicate()[0].splitlines()
    return map (lambda k: k.split()[0], lineas) # solo la primera palabra

def filtra(xs):
   return filter(lambda k: len(k) > 0 and k.find('Required') != 0 and k.find('Information') != 0 and k[0] != '\n', xs) 

def dependencias(xs):
    ret = []
    for x in xs:
        proceso = sp.Popen(["pkg_info", "-R", x], stdout=sp.PIPE)
        lineas = proceso.communicate()[0].splitlines()
        ret.append(lineas)
    return map(filtra, ret)

# i = instalados()
# pares = zip(i, dependencias(i))
# for (x,depx) in pares:
#    for y in depx:
#        print y + " -> " + x