add pt2tf tool

pt2tf/onnx-tensorflow/onnx_tf/handlers/backend/tanh.py

@@ -0,0 +1,19 @@
+import tensorflow as tf
+
+from onnx_tf.handlers.backend_handler import BackendHandler
+from onnx_tf.handlers.handler import onnx_op
+from onnx_tf.handlers.handler import tf_func
+from .math_mixin import BasicMathMixin
+
+
+@onnx_op("Tanh")
+@tf_func(tf.tanh)
+class Tanh(BasicMathMixin, BackendHandler):
+
+  @classmethod
+  def version_1(cls, node, **kwargs):
+    return [cls.make_tensor_from_onnx_node(node, **kwargs)]
+
+  @classmethod
+  def version_6(cls, node, **kwargs):
+    return [cls.make_tensor_from_onnx_node(node, **kwargs)]