swap pytorch and tvm import order (#7380)

tests/python/frontend/pytorch/test_object_detection.py

@@ -17,8 +17,6 @@
 # pylint: disable=import-self, invalid-name, unused-argument
 """Test torch vision fasterrcnn and maskrcnn models"""
 import numpy as np
-import torch
-import torchvision
 import cv2
 
 import tvm
@@ -33,6 +31,8 @@
 )
 from tvm.contrib.download import download
 
+import torch
+import torchvision
 
 in_size = 300
 
@@ -150,10 +150,10 @@ def compile_and_run_vm(mod, params, data_np, target):
     after = mod["main"]
     assert not tvm.ir.structural_equal(after, before)
 
-    # before = mod["main"]
-    # mod = rewrite_scatter_to_gather(mod, 4)  # num_scales is 4 for maskrcnn_resnet50_fpn
-    # after = mod["main"]
-    # assert not tvm.ir.structural_equal(after, before)
+    before = mod["main"]
+    mod = rewrite_scatter_to_gather(mod, 4)  # num_scales is 4 for maskrcnn_resnet50_fpn
+    after = mod["main"]
+    assert not tvm.ir.structural_equal(after, before)
 
     tvm_res_after_rewrite = compile_and_run_vm(mod, params, data_np, "llvm")