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ecflow.PartExpression
/////////////////////
.. py:class:: PartExpression
:module: ecflow
Bases: :py:class:`~Boost.Python.instance`
PartExpression holds part of a :term:`trigger` or :term:`complete expression`.
Expressions can contain references to :term:`event`\s, :term:`meter`\ s, user variables,
:term:`repeat` variables and generated variables. The part expression allows us
to split a large trigger or complete expression into smaller ones
Constructor::
PartExpression(exp )
string exp: This represents the *first* expression
PartExpression(exp, bool and_expr)
string exp: This represents the expression
bool and_exp: If true the expression is to be anded, with a previously added expression
If false the expression is to be 'ored', with a previously added expression
Usage:
To add simple expression this class can be by-passed, i.e. can use:
.. code-block:: python
task = Task('t1')
task.add_trigger( 't2 == active' )
task.add_complete( 't2 == complete' )
To add large triggers and complete expression:
.. code-block:: python
exp1 = PartExpression('t1 == complete')
# a simple expression can be added as a string
....
task2.add_part_trigger( PartExpression('t1 == complete or t4 == complete') )
task2.add_part_trigger( PartExpression('t5 == active',True) ) # anded with first expression
task2.add_part_trigger( PartExpression('t7 == active',False) ) # or'ed with last expression added
The trigger for task2 is equivalent to
't1 == complete or t4 == complete and t5 == active or t7 == active'
.. py:method:: PartExpression.and_expr( (PartExpression)arg1) -> bool
:module: ecflow
.. py:method:: PartExpression.get_expression( (PartExpression)arg1) -> str :
:module: ecflow
returns the part expression as a string
.. py:method:: PartExpression.or_expr( (PartExpression)arg1) -> bool
:module: ecflow
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