修正了一个 onnx domain 的相关问题 (#537)

新的 onnx checker 会对 ai.onnx 这个 domain 报错，这个补丁将其修改为 ""

ppq/parser/onnxruntime_exporter.py

@@ -587,7 +587,11 @@ def export(self, file_path: str, graph: BaseGraph,
 
         for key, value in extra_opsets.items():
             op = onnx.OperatorSetIdProto()
-            op.domain = key
+            # PATCH 2024.01.30
+            # 我也不知道为什么 onnx checker 会对 ai.onnx 这个 domain 报错
+            # 按照规范 ai.onnx 与 "" 是等价的写法
+            if key == 'ai.onnx': key = "" 
+            op.domain  = key
             op.version = value
             opsets.append(op)
 
@@ -613,4 +617,4 @@ def export(self, file_path: str, graph: BaseGraph,
             ppq_warning('Exported Onnx Model is not executable, following Op has onnxruntime-unsupported quant policy:')
             for op in unsupportable_quant_op:
                 ppq_warning(f'{op.name} (bitwidth != 8)')
-            ppq_warning('For Generating onnxruntime-executable Model, use TargetPlatform = Onnxruntime or OnnxruntimeQuantizer instead.')
+            ppq_warning('For Generating onnxruntime-executable Model, use TargetPlatform = Onnxruntime or OnnxruntimeQuantizer instead.')