1 files changed, 39 insertions, 0 deletions
diff --git a/resources/libraries/python/PythonThree.py b/resources/libraries/python/PythonThree.py
new file mode 100644
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+++ b/resources/libraries/python/PythonThree.py
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+# Copyright (c) 2019 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Library holding utility functions to be replaced by later Python builtins."""
+
+from robot.api import logger
+
+
+def raise_from(raising, excepted, level="WARN"):
+    """Function to be replaced by "raise from" in Python 3.
+
+    Neither "six" nor "future" offer good enough implementation right now.
+    chezsoi.org/lucas/blog/displaying-chained-exceptions-stacktraces-in-python-2
+
+    Current implementation just logs the excepted error, and raises the new one.
+    For allower log level values, see:
+    robot-framework.readthedocs.io/en/latest/autodoc/robot.api.html#log-levels
+
+    :param raising: The exception to raise.
+    :param excepted: The exception we excepted and want to log.
+    :param level: Robot logger logging level to log with.
+    :type raising: BaseException
+    :type excepted: BaseException
+    :type level: str
+    :raises: raising
+    """
+    logger.write("Excepted: {exc!r}\nRaising: {rai!r}".format(
+        exc=excepted, rai=raising), level)
+    raise raising