add pt2tf tool

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

@@ -0,0 +1,24 @@
+from onnx_tf.handlers.backend_handler import BackendHandler
+from onnx_tf.handlers.handler import onnx_op
+from .pool_mixin import PoolMixin
+
+
+@onnx_op("LpPool")
+class LpPool(PoolMixin, BackendHandler):
+
+  @classmethod
+  def _common(cls, node, **kwargs):
+    return cls.pool(node, kwargs["tensor_dict"], "LP",
+                    kwargs.get("strict", True))
+
+  @classmethod
+  def version_1(cls, node, **kwargs):
+    return cls._common(node, **kwargs)
+
+  @classmethod
+  def version_2(cls, node, **kwargs):
+    return cls._common(node, **kwargs)
+
+  @classmethod
+  def version_11(cls, node, **kwargs):
+    return cls._common(node, **kwargs)