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#==============================================pymats.py#!/usr/bin/env pthon# -*- coding: utf-8 -*-from primos import primoimport sysprint "=== scripts de matemáticas en python ===\n"i = 0while i < 1:    lista_menu = ["nprimo" , "mcm" , "mcd"]    cont_menu = 0    for n in lista_menu:        cont_menu = cont_menu + 1        print "%d - %s" % (cont_menu, n)    print "0 - Salir"    opt = str(raw_input("\n introdusca una opción: "))    opt = opt.lower()        if opt == "nprimo" or opt == "1":        primo()    elif opt == "mcm" or opt == "2":        print "mcm"    elif opt == "mcd" or opt == "3":        print "mcd"    elif opt == "salir" or opt == "0":        sys.exit()    else:        print "error"#fin#==============================================primos.py# -*- coding: utf-8 -*-def primo():    try:        numero = int(raw_input("\n introdusca un numero: "))        nprimo = True        for i in range(2,numero):            if numero % i == 0:                nprimo = False                break        if nprimo:            print "es número primo\n"        else:            print "NO es número primo\n"    except:        print "error"#fin