class to execute shell cmd

commands.py

class Command(object):

    def __init__(self, args):
        self.cmd_args = args

    def __call__(self):
        (self.out, self.err) = subprocess.Popen(self.cmd_args,
                                                stdout=subprocess.PIPE,
                                                stderr=subprocess.PIPE,
                                                shell=True).communicate()

    @property
    def output(self):
        return self.out

    @property
    def error(self):
        return self.err