M>http://www.nedbatchelder.com/code/cog/index_ru.html

http://www.pythonology.com/success&story=cog

Here's a concrete but slightly contrived example. The properties are described in an XML file:

<!-- Properties.xml -->
<props>
        <property name='Id' type='String' />
        <property name='RevNum' type='Integer' />
        <property name='Subject' type='String' />
        <property name='ModDate' type='Date' />
</props>

We can write a C++ file with inlined Python code:

// SchemaPropEnum.h
enum SchemaPropEnum {
        /* [[[cog
        import cog, handyxml
        for p in handyxml.xpath('Properties.xml', '//property'):
                cog.outl("Property%s," % p.name)
        ]]] */
        // [[[end]]]
};

After running this file through Cog, it looks like this:

// SchemaPropEnum.h
enum SchemaPropEnum {
        /* [[[cog
        import cog, handyxml
        for p in handyxml.xpath('Properties.xml', '//property'):
                cog.outl("Property%s," % p.name)
        ]]] */
        PropertyId,
        PropertyRevNum,
        PropertySubject,
        PropertyModDate,
        // [[[end]]]
};