template files evaluation in python
<p>I am trying to use python for translating a set of templates to a set of configuration files based on values taken from a main configuration file. However, I am having certain issues. Consider the following example of a template file.</p>

<p>file1.cfg.template</p>

<pre><code>%(CLIENT1)s %(HOST1)s  %(PORT1)d  C  %(COMPID1)s
%(CLIENT2)s %(HOST2)s  %(PORT2)d  C  %(COMPID2)s
</code></pre>

<p>This file contains an entry for each client. There are hundreds of config files like this and I don't want to have logic for each type of config file. Python should do the replacements and generate config files automatically given a set of global values read from a main xml config file. However, in the above example, if CLIENT2 does not exist, how do I delete that line?  I expect Python would generate the config file using something like this:</p>

<pre><code>os.open("file1.cfg.template").read() % myhash
</code></pre>

<p>where myhash is hash of configuration parameters from the main config file which may not contain CLIENT2 at all. In the case it does not contain CLIENT2, I want that line to disappear from the file. Is it possible to insert some 'IF' block in the file and have python evaluate it?</p>

<p>Thanks for your help. Any suggestions most welcome.</p>
