blendfile.py 文件源码

def get(self, path,
            default=...,
            sdna_index_refine=None,
            use_nil=True, use_str=True,
            base_index=0,
            ):

        ofs = self.file_offset
        if base_index != 0:
            assert(base_index < self.count)
            ofs += (self.size // self.count) * base_index
        self.file.handle.seek(ofs, os.SEEK_SET)

        if sdna_index_refine is None:
            sdna_index_refine = self.sdna_index
        else:
            self.file.ensure_subtype_smaller(self.sdna_index, sdna_index_refine)

        dna_struct = self.file.structs[sdna_index_refine]
        return dna_struct.field_get(
                self.file.header, self.file.handle, path,
                default=default,
                use_nil=use_nil, use_str=use_str,
                )