.. _`Conditional error/warning`:

.. _`org.sysess.sympathy.data.table.conditionalerror`:

Conditional error/warning
~~~~~~~~~~~~~~~~~~~~~~~~~

.. image:: error.svg
   :width: 48


Raise an error if the supplied predicate function returns True.

See https://docs.python.org/3/tutorial/controlflow.html#lambda-expressions
for a description of lambda functions. Have a look at the :ref:`Data type
APIs<datatypeapis>` to see what methods and attributes are available on the
data type that you are working with.

*Input ports*:
    :in: <a>

        Input

*Output ports*:
    :out: <a>

        Output

*Configuration*:
    **Predicate function:** (predicate)
        Error message is printed if this function returns True.
    **Error message:** (error_msg)
        Error message to display to the user.
    **Severity:** (error_type)
        The level "Error" stops flow execution.

.. automodule:: node_conditional_error

.. class:: ConditionalError


Example flows
#############

* :download:`Test.syx </_examples/Sympathy/Development/Test/Test.syx>`