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<div class="line">Sometime it is very useful to see <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-task"><em class="xref std std-term">task</em></a> specific information in <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-ecflowview"><em >ecFlowview< class="xref std std-term">ecflowview</em></a>.</div>
<div class="line">For this we can define a <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-label"><em class="xref std std-term">label</em></a>. A <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-label"><em class="xref std std-term">label</em></a> is a string that is attached to 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">and that can be updated using the <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-child-command"><em class="xref std std-term">child command</em></a> <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-ecfecflow-client"><em >ecf class="xref std std-term">ecflow_client</em></a> &#8211;label</div>
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<div class="highlight-python"><pre># Definition of the suite test.
suite test
 edit ECF_INCLUDE "$HOME/course"
 edit ECF_HOME    "$HOME/course"
 family f1
     edit SLEEP 20
     task t1
         meter progress 1 100 90
     task t2
         trigger t1 eq complete
         event a
         event b
     task t3
         trigger t2:a
     task t4
         trigger t2 eq complete
         complete t2:b
     task t5
         trigger t1:progress ge 30
     task t6
         trigger t1:progress ge 60
     task t7
         trigger t1:progress ge 90
 endfamily
 family f2
     edit SLEEP 20
     task t1
         time 00:30 23:30 00:30
     task t2
         day  sunday
     task t3
         date 01.*.*
         time 12:00
     task t4
         time +00:02
     task t5
         time 00:02
 endfamily
 family f3
     task t1
         label info ""
 endfamily
endsuite</pre>
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<p>The following section shows how to add a <a<tt  href="/wiki/display/ECFLOW/ecFlow+Python+Api#ecflow.Label" title="ecflow.Label"><tt ><span class="xref py py-class docutils literal"><span class="pre">ecflow.Label</span></tt></a>tt> in python:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="c">#!/usr/bin/env python2.5</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_f3</span><span class="p">():</span>
    <span class="n">f3</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;f3&quot;</span><span class="p">)</span>
    <span class="n">t1</span> <span class="o">=</span> <span class="n">f3</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">t1</span><span class="o">.</span><span class="n">add_label</span><span class="p">(</span><span class="s">&quot;info&quot;</span><span class="p">,</span><span class="s">&quot;&quot;</span><span class="p">);</span>
    <span class="k">return</span> <span class="n">f3</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 >(</span><span >&quot;test.def&quot;</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_f3</span><span class="p">()</span> <span class="p">)</span>    
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<p>We now need to edit the <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-ecf-script"><em class="xref std std-term">ecf script</em></a> file <tt class="file docutils literal"><span class="pre">$HOME/course/test/f3/t1.ecf</span></tt>:</p>
<div class="highlight-python"><pre>%include &lt;head.h&gt;
n=1
while [[ $n -le 5 ]]                # Loop 5 times
do
   msg="The date is now $(date)"
   ecfecflow_client --label=info "$msg"  # Set the label
   sleep 60                        # Wait a one minute
   (( n = $n + 1 ))
done

ecfecflow_client --label info "I have now finished my work."

%include &lt;tail.h&gt;</pre>
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<p>What to do:</p>
<ol class="arabic simple">
<li>Modify the <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-suite-definition"><em class="xref std std-term">suite definition</em></a> file or python script</li>
<li>Edit the new <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-ecf-script"><em class="xref std std-term">ecf script</em></a></li>
<li>Load the <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-suite-definition"><em class="xref std std-term">suite definition</em></a> file and begin the <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-suite"><em class="xref std std-term">suite</em></a></li>
<li>Watch in <a class="reference internal" href="/wiki/display/ECFLOW/Glossary#term-ecflowview"><em >ecFlowview<class="xref std std-term">ecflowview</em></a></li>
</ol>
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