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.

file1.cfg.template

%(CLIENT1)s %(HOST1)s  %(PORT1)d  C  %(COMPID1)s
%(CLIENT2)s %(HOST2)s  %(PORT2)d  C  %(COMPID2)s

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:

os.open("file1.cfg.template").read() % myhash

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?

Thanks for your help. Any suggestions most welcome.