Axiom legacy declaration generator

legacy

#!/usr/bin/env python
from twisted.python.reflect import namedAny

template = """
declareLegacyItem(
    typeName=%r,
    schemaVersion=%d,
    attributes=dict(
        %s))
"""

def legacyItemCode(itemClass):
    def _d(value):
        if value is None:
            return ''
        return ', default=%r' % (value)

    calculatedAttributes = ',\n        '.join(
        ['%s=%s(allowNone=%r%s)' % (k, v.__class__.__name__, v.allowNone, _d(v.default))
         for k, v in itemClass.getSchema()])
    fmt = template % (itemClass.typeName, itemClass.schemaVersion,
                      calculatedAttributes)
    return fmt


if __name__ == '__main__':
    import sys
    f = sys.stdout
    f.write(legacyItemCode(namedAny(sys.argv[1])))