:class:`PreOp`
==============

.. py:class:: ansys.scade.apitools.expr.access.PreOp(expression: scade.model.suite.ExprCall)

   Bases: :py:obj:`CallExpression`


   Provides the previous value of flows.

   The format is ``pre <flow>, ..., <flow>``.

   See the :ref:`pre_op <ex__pre_op>` example.

   Notes
   -----
   The design differs slightly from the meta-model. Because the input
   must be a group of flows, the :class:`~PreOp` class does not inherit
   from the :class:`~FlowOp` class. It exposes directly the lists of flows instead of
   having a flow that is an instance of a :class:`~ListExpression` class.

   Parameters
   ----------
   expression :
       Call expression to wrap.


   Initialize the instance from the Scade expression.
















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.. py:currentmodule:: PreOp

Overview
--------

.. tab-set::




   .. tab-item:: Properties

      .. list-table::
          :header-rows: 0
          :widths: auto

          * - :py:attr:`~flows`
            - Flows after the first cycle.







Import detail
-------------

.. code-block:: python

    from ansys.scade.apitools.expr.access import PreOp

Property detail
---------------

.. py:property:: flows
   :type: list[Expression]


   
   Flows after the first cycle.
















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