Fix TFLite RESHAPE assert (#4320)

python/tvm/relay/frontend/tflite.py

@@ -265,7 +265,7 @@ class OperatorConverter(object):
 
         assert isinstance(op, Operator)
         input_tensors = self.get_input_tensors(op)
-        assert len(input_tensors) == 2, "input tensors length should be 2"
+        assert input_tensors, "input tensors should not be empty"
         input_tensor = input_tensors[0]
         input_tensor_idx = input_tensor.tensor_idx
 

tests/python/frontend/tflite/test_forward.py

@@ -38,6 +38,7 @@ try:
 except ImportError:
     from tensorflow.contrib import lite as interpreter_wrapper
 
+from tvm.contrib.download import download_testdata
 import tvm.relay.testing.tf as tf_testing
 from packaging import version as package_version
 
@@ -1138,6 +1139,25 @@ def test_forward_ssd_mobilenet_v1():
                                 rtol=1e-5, atol=1e-5)
 
 #######################################################################
+# MediaPipe
+# -------------
+
+def test_forward_mediapipe_hand_landmark():
+    """Test MediaPipe 2D hand landmark TF Lite model."""
+    # MediaPipe 2D hand landmark TF
+    tflite_model_file = download_testdata(
+        "https://github.com/google/mediapipe/raw/master/mediapipe/models/hand_landmark.tflite",
+        "hand_landmark.tflite")
+    with open(tflite_model_file, "rb") as f:
+        tflite_model_buf = f.read()
+    data = np.random.uniform(size=(1, 256, 256, 3)).astype('float32')
+    tflite_output = run_tflite_graph(tflite_model_buf, data)
+    tvm_output = run_tvm_graph(tflite_model_buf, data, 'input_1', num_output=2)
+    for i in range(2):
+        tvm.testing.assert_allclose(np.squeeze(tvm_output[i]), np.squeeze(tflite_output[i]),
+                                    rtol=1e-5, atol=1e-5)
+
+#######################################################################
 # Main
 # ----
 if __name__ == '__main__':
@@ -1192,6 +1212,7 @@ if __name__ == '__main__':
     test_forward_inception_v3_net()
     test_forward_inception_v4_net()
     test_forward_ssd_mobilenet_v1()
+    test_forward_mediapipe_hand_landmark()
 
     # End to End quantized
     test_forward_qnn_inception_v1_net()