def _getPropertyValue(schema, propertyName, options):
if propertyName not in options:<EOL><INDENT>paramsSchema = schema['<STR_LIT>'][propertyName]<EOL>if '<STR_LIT:default>' in paramsSchema:<EOL><INDENT>options[propertyName] = paramsSchema['<STR_LIT:default>']<EOL><DEDENT>else:<EOL><INDENT>options[propertyName] = None<EOL><DEDENT><DEDENT>
Checks to see if property is specified in 'options'. If not, reads the
    default value from the schema