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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 _validate_global_include(self, path):
 """ Normally validation method is writen in each validation of parameters. But `include` of global section needs to be read before validation. :param str path: absolute path :rtype: bool :return: If given path passes validation, returns True. """

        if not path.endswith('/'):
            path = os.path.dirname(path)

        if os.path.exists(path):
            if not os.access(path, os.R_OK):
                raise blackbird.utils.error.BlackbirdError(
                    message=(
                        '{0}: Permission denied.'
                        ''.format(path)
                    )
                )

        else:
            raise blackbird.utils.error.BlackbirdError(
                message=(
                    '{0}: No such file or directory.'
                    ''.format(path)
                )
            )

        return True