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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_command(self, ctx, name):
 """Get the command from either the commands dir or default group"""

        if not self._commands_dir:
            return defaults.get_command(ctx, name)

        ns = {}
        fn = os.path.join(self._commands_dir, name + '.py')

        try:
            with open(fn) as f:
                code = compile(f.read(), fn, 'exec')
        except IOError:
            return defaults.get_command(ctx, name)

        eval(code, ns, ns)

        CLI = 'cli'

        try:
            return ns[CLI]
        except KeyError:
            ctx.fail('`{}` not defined in "{}"'.format(CLI, name))