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A limited evaluator for Python expressions.
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Initialise an instance.
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Evaluate a source string or node, using ``filename`` when
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zEvaluator.do_attributec C s„ | j |jd ƒ}|jjtjk}|jjtjk}|s8|s8t‚|r@|sJ|r€| r€x4|jdd … D ]"}| j |ƒ}|rp|sz|rZ| rZP qZW |S )Nr r )r. ÚvaluesÚopr' r$ ZOrZAndr/ )r r+ r8 Zis_orZis_andÚnr r r Ú do_boolopx s
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do_expression¢ s zEvaluator.do_expressionc C sT d}|j | jkr"d}| j|j }n |j | jkr>d}| j|j }|sPtd|j ƒ‚|S )NFTzinvalid expression: %s)r1 r r5 r& )r r+ r6 r8 r r r Údo_name¥ s zEvaluator.do_namec C s |j S )N)r )r r+ r r r Údo_str± s zEvaluator.do_str)N)N) r( Ú
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Interpret a marker and return a result depending on environment.
:param marker: The marker to interpret.
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)r r. Ústrip)ZmarkerZexecution_contextr r r r µ s )N)rJ r$ rP rK rL Úcompatr r Úutilr Ú__all__Úobjectr r r r r r Ú<module> s "
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