Yanz mini Shell

PATTERN = """
    power< 'intern'
           trailer< lpar='('
                    ( not(arglist | argument<any '=' any>) obj=any
                      | obj=arglist<(not argument<any '=' any>) any ','> )
                    rpar=')' >
           after=any*
    >
    """

def transform(self, node, results):
        syms = self.syms
        obj = results["obj"].clone()
        if obj.type == syms.arglist:
            newarglist = obj.clone()
        else:
            newarglist = pytree.Node(syms.arglist, [obj.clone()])
        after = results["after"]
        if after:
            after = [n.clone() for n in after]
        new = pytree.Node(syms.power,
                          Attr(Name(u"sys"), Name(u"intern")) +
                          [pytree.Node(syms.trailer,
                                       [results["lpar"].clone(),
                                        newarglist,
                                        results["rpar"].clone()])] + after)
        new.prefix = node.prefix
        touch_import(None, u'sys', node)
        return new

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