if self.options['address'] not in range(0, 127 + 1):
raise Exception('Invalid slave (must be 0..127).')
if self.options['direction'] not in ('both', 'read', 'write'):
raise Exception('Invalid direction (valid: read/write/both).')
if self.options['address'] not in range(0, 127 + 1):
raise Exception('Invalid slave (must be 0..127).')
if self.options['direction'] not in ('both', 'read', 'write'):
raise Exception('Invalid direction (valid: read/write/both).')