use of '\' tags in python string
<p>What is the use of '\' tags in python string. For example, I have to execute this command:</p>

<pre><code>cmd = 'exec ' + cs_bin + ' ' +  \
               vmtree.rsplit('-', 1)[1].split('/')[0] + ' --xml ' \
               + tmp_corefile + ' | ' + XML2HTML 
</code></pre>

<p>what are '\' used for?
Thank you.</p>
