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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 _handle_exclude(self, state, sls, saltenv, errors):
        '''
        Take the exclude dec out of the state and apply it to the highstate
        global dec
        '''
        if 'exclude' in state:
            exc = state.pop('exclude')
            if not isinstance(exc, list):
                err = ('Exclude Declaration in SLS {0} is not formed '
                       'as a list'.format(sls))
                errors.append(err)
            state.setdefault('__exclude__', []).extend(exc)