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<div class="section" id="add-a-complete">
<span id="add-complete"></span><span id="index-0"></span>
<div class="line-block">
<div class="line">Sometimes you do not want to run a <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-task"><em class="xref std std-term">task</em></a> when a certain condition is met.</div>
<div class="line">The condition can be signalled by an event. For example, event t2:b</div>
<div class="line">might indicate that task t2 did not manage to produce expected result, so</div>
<div class="line">we do not need to run task t4.</div>
</div>
<div class="line-block">
<div class="line">In this case you can use the <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-complete-expression"><em class="xref std std-term">complete expression</em></a> keyword.</div>
<div class="line">This has a similar syntax to the <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-trigger"><em class="xref std std-term">trigger</em></a> keyword but sets a <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-task"><em class="xref std std-term">task</em></a></div>
<div class="line"><a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-complete"><em class="xref std std-term">complete</em></a> rather than running it.</div>
</div>
<div class="line-block">
<div class="line">When <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-ecflow-server"><em class="xref std std-term">ecflow_server</em></a> tries to start a <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-task"><em class="xref std std-term">task</em></a>, it  evaluates the <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-trigger"><em class="xref std std-term">trigger</em></a></div>
<div class="line">and <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-complete-expression"><em class="xref std std-term">complete expression</em></a> s. If the <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-complete-expression"><em class="xref std std-term">complete expression</em></a> condition is correct,</div>
<div class="line">the task will set itself <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-complete"><em class="xref std std-term">complete</em></a>.</div>
</div>
<p><a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-complete-expression"><em class="xref std std-term">complete expression</em></a> evaluation takes precedence over the <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-trigger"><em class="xref std std-term">trigger</em></a>.</p>
<p>Completes can be between tasks, between families, or both.</p>
<div class="line-block">
<div class="line">It can be used in conjunction with a <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-trigger"><em class="xref std std-term">trigger</em></a>. For example:</div>
</div>
<div class="section" id="text">
<h2>Text<a class="headerlink" href="#text" title="Permalink to this headline">¶</a></h2>
<div class="highlight-python"><pre># Definition of the suite test.
suite test
   edit ECF_INCLUDE "$HOME/course"   # replace '$HOME' with the path to your home directory
   edit ECF_HOME    "$HOME/course"
   family f1
     edit SLEEP 20
     task t1
     task t2
         trigger t1 eq complete
         event a
         event b
     task t3
         trigger t2:a
     task t4
         trigger t2 eq complete
         complete t2:b
   endfamily
endsuite</pre>
</div>
</div>
<div class="section" id="python">
<h2>Python<a class="headerlink" href="#python" title="Permalink to this headline">¶</a></h2>
<div class="highlight-python"><div class="highlight"><pre><span class="c">#!/usr/bin/env python2.7</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">ecflow</span> 

<span class="k">def</span> <span class="nf">create_family_f1</span><span class="p">():</span>
    <span class="n">f1</span> <span class="o">=</span> <span class="n">ecflow</span><span class="o">.</span><span class="n">Family</span><span class="p">(</span><span class="s">&quot;f1&quot;</span><span class="p">)</span>
    <span class="n">f1</span><span class="o">.</span><span class="n">add_variable</span><span class="p">(</span><span class="s">&quot;SLEEP&quot;</span><span class="p">,</span> <span class="mi">20</span><span class="p">)</span>
    <span class="n">f1</span><span class="o">.</span><span class="n">add_task</span><span class="p">(</span><span class="s">&quot;t1&quot;</span><span class="p">)</span>
    <span class="n">t2</span> <span class="o">=</span> <span class="n">f1</span><span class="o">.</span><span class="n">add_task</span><span class="p">(</span><span class="s">&quot;t2&quot;</span><span class="p">)</span>  
    <span class="n">t2</span><span class="o">.</span><span class="n">add_trigger</span><span class="p">(</span><span class="s">&quot;t1 eq complete&quot;</span><span class="p">)</span> 
    <span class="n">t2</span><span class="o">.</span><span class="n">add_event</span><span class="p">(</span><span class="s">&quot;a&quot;</span><span class="p">)</span>
    <span class="n">t2</span><span class="o">.</span><span class="n">add_event</span><span class="p">(</span><span class="s">&quot;b&quot;</span><span class="p">)</span>
    <span class="n">f1</span><span class="o">.</span><span class="n">add_task</span><span class="p">(</span><span class="s">&quot;t3&quot;</span><span class="p">)</span><span class="o">.</span><span class="n">add_trigger</span><span class="p">(</span><span class="s">&quot;t2:a&quot;</span><span class="p">)</span>  
    <span class="n">t4</span> <span class="o">=</span> <span class="n">f1</span><span class="o">.</span><span class="n">add_task</span><span class="p">(</span><span class="s">&quot;t4&quot;</span><span class="p">)</span>
    <span class="n">t4</span><span class="o">.</span><span class="n">add_trigger</span><span class="p">(</span><span class="s">&quot;t2 eq complete&quot;</span><span class="p">)</span>  
    <span class="n">t4</span><span class="o">.</span><span class="n">add_complete</span><span class="p">(</span><span class="s">&quot;t2:b&quot;</span><span class="p">)</span>  
    <span class="k">return</span> <span class="n">f1</span>
      
<span class="k">print</span> <span class="s">&quot;Creating suite definition&quot;</span>   
<span class="n">defs</span> <span class="o">=</span> <span class="n">ecflow</span><span class="o">.</span><span class="n">Defs</span><span class="p">()</span>
<span class="n">suite</span> <span class="o">=</span> <span class="n">defs</span><span class="o">.</span><span class="n">add_suite</span><span class="p">(</span><span class="s">&quot;test&quot;</span><span class="p">)</span>
<span class="n">suite</span><span class="o">.</span><span class="n">add_variable</span><span class="p">(</span><span class="s">&quot;ECF_INCLUDE&quot;</span><span class="p">,</span> <span class="n">os</span><span class="o">.</span><span class="n">getenv</span><span class="p">(</span><span class="s">&quot;HOME&quot;</span><span class="p">)</span> <span class="o">+</span> <span class="s">&quot;/course&quot;</span><span class="p">)</span>
<span class="n">suite</span><span class="o">.</span><span class="n">add_variable</span><span class="p">(</span><span class="s">&quot;ECF_HOME&quot;</span><span class="p">,</span>    <span class="n">os</span><span class="o">.</span><span class="n">getenv</span><span class="p">(</span><span class="s">&quot;HOME&quot;</span><span class="p">)</span> <span class="o">+</span> <span class="s">&quot;/course&quot;</span><span class="p">)</span>

<span class="n">suite</span><span class="o">.</span><span class="n">add_family</span><span class="p">(</span> <span class="n">create_family_f1</span><span class="p">()</span> <span class="p">)</span>
<span class="k">print</span> <span class="n">defs</span>

<span class="k">print</span> <span class="s">&quot;Checking job creation: .ecf -&gt; .job0&quot;</span>   
<span class="k">print</span> <span class="n">defs</span><span class="o">.</span><span class="n">check_job_creation</span><span class="p">()</span>

<span class="k">print</span> <span class="s">&quot;Saving definition to file &#39;test.def&#39;&quot;</span>
<span class="n">defs</span><span class="o">.</span><span class="n">save_as_defs</span><span class="p">(</span><span class="s">&quot;test.def&quot;</span><span class="p">)</span>
</pre></div>
</div>
<p><strong>What to do:</strong></p>
<ol class="arabic simple">
<li>Update <tt class="file docutils literal"><span class="pre">test.def</span></tt> or <tt class="file docutils literal"><span class="pre">test.py</span></tt> to add a <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-complete-expression"><em class="xref std std-term">complete expression</em></a> to task <strong>t4</strong></li>
<li>Replace the <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-suite"><em class="xref std std-term">suite</em></a></li>
<li>Observe the tasks in <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-ecflowview"><em class="xref std std-term">ecflowview</em></a></li>
<li>See the triggers by selecting <strong>t4</strong> and clicking on the <img alt="triggers" src="../../../_images/triggers.jpg" /> icon</li>
<li>See the trigger relation by clicking on the arrow</li>
<li>See the triggers in the tree, using the Show menu</li>
<li>Note the icon indicating that the task has not run</li>
<li>You can modify task <strong>t2</strong> to check that task <strong>t4</strong> will run when the event is not set</li>
</ol>
</div>
</div>