Engineering, 22.04.2020 03:55 myvenus88

Def eval(self, env): """ >>> from reader import read >>> new_env = global_env. copy() >>> new_env. update({'a': Number(1), 'b': Number(2)}) >>> add = CallExpr(Name('add'), [Literal(3), Name('a')]) >>> add. eval(new_env) Number(4) >>> new_env['a'] = Number(5) >>> add. eval(new_env) Number(8)

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Def eval(self, env): """ >>> from reader import read >>> new_env = global_env. cop...