def set_guid(self, value):
raw_bytes = UUID.get_bytes_le(value)
p1 = raw_bytes[0:4]
p2 = raw_bytes[4:6]
p3 = raw_bytes[6:8]
p4 = raw_bytes[8:16]
self.reader.set_raw_header_property("proj_id_1", p1)
self.reader.set_raw_header_property("proj_id_2", p2)
self.reader.set_raw_header_property("proj_id_3", p3)
self.reader.set_raw_header_property("proj_id_4", p4)
'''Sets the GUID for the file. It must be a :class:`uuid.UUID`
instance'''
return