def get_argprops(self):
        d = {}
        hardest_arg = P_NODE
        for i in range(len(self.argnames)):
            arg = self.argnames[i]
            if arg.endswith('*'):
                arg = self.argnames[i] = arg[:-1]
                d[arg] = P_OTHER
                hardest_arg = max(hardest_arg, P_OTHER)
            elif arg.endswith('!'):
                arg = self.argnames[i] = arg[:-1]
                d[arg] = P_NESTED
                hardest_arg = max(hardest_arg, P_NESTED)
            elif arg.endswith('&'):
                arg = self.argnames[i] = arg[:-1]
                d[arg] = P_NONE
                hardest_arg = max(hardest_arg, P_NONE)
            else:
                d[arg] = P_NODE
        self.hardest_arg = hardest_arg

        if hardest_arg > P_NODE:
            self.args = self.args.replace('*', '')
            self.args = self.args.replace('!', '')
            self.args = self.args.replace('&', '')

        return d
Each argument can have a property like '*' or '!'
dataset/ETHPy150Open anandology/pyjamas/pgen/astgen.skult.py/NodeInfo.get_argprops