    from BasicTypeAttr import BasicTypeAttr

    class StringAttr(BasicTypeAttr):

        def __init__(self, attr):
            BasicTypeAttr.__init__(self, attr)
            if self.get('Max') is not None:
                self['Max'] = int(self['Max'])
            if self.get('Min') is not None:
                self['Min'] = int(self['Min'])

        def printWarnings(self, out):
            if self.get('Max') in (None, '') and not self.get('SQLType'):
                out.write('warning: model %s: class %s: attr %s: max string length unspecified\n' % (
                    self.model().name(), self.klass().name(), self.name()))