Fix keras nightly applications (#1661)

Signed-off-by: Tom Wildenhain <[email protected]>

Author: TomWildenhain-Microsoft

tests/keras2onnx_applications/nightly_build/test_resnext.py

@@ -7,7 +7,12 @@
 import numpy as np
 from mock_keras2onnx.proto import keras
 from mock_keras2onnx.proto.tfcompat import is_tf2
-from keras.regularizers import l2
+if is_tf2:
+    def l2(weight_decay):
+        # old keras layer expects a tuple but tf keras wants a single value
+        return keras.regularizers.l2(weight_decay[0])
+else:
+    from keras.regularizers import l2
 from os.path import dirname, abspath
 sys.path.insert(0, os.path.join(dirname(abspath(__file__)), '../../keras2onnx_tests/'))
 img_path = os.path.join(os.path.dirname(__file__), '../data', 'street.jpg')