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Engine classes for :func:`~pandas.eval`
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é )Ú annotationsN)Ú TYPE_CHECKING)ÚNumExprClobberingError)Ú align_termsÚreconstruct_object)ÚMATHOPSÚ
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REDUCTIONS)Úprinting)ÚExprc ó° | j }|t z }|r:dj |D cg c] }t |« c}« }t d| d| d« yc c}w )z
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Attempt to prevent foot-shooting in a helpful way.
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Parameters
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----------
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expr : Expr
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Terms can contain
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j d « Z y) ÚAbstractEnginez/Object serving as a base class for all engines.Fc ó. || _ d | _ d | _ y ©N)r Ú aligned_axesÚ result_type)Úselfr s r Ú__init__zAbstractEngine.__init__4 s Ø Ø ÔØ Õó c ó@ t j | j « S )zo
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Convert an expression for evaluation.
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Defaults to return the expression as a string.
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Ú pprint_thingr ©r s r ÚconvertzAbstractEngine.convert9 s ô ×$Ñ$ T§Y¡YÓ/Ð/r c ó | j s,t | j j « \ | _ | _ | j « }t | j || j
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Run the engine on the expression.
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This method performs alignment which is necessary no matter what engine
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is being used, thus its implementation is in the base class.
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Returns
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-------
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object
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The result of the passed expression.
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) Ú _is_alignedr r Útermsr r Ú _evaluater Ú return_type)r Úress r ÚevaluatezAbstractEngine.evaluateA sh ð × Ò Ü2=¸d¿i¹i¿o¹oÓ2NÑ /DÔ dÔ /ð nnÓ Ü!Ø × Ñ c 4×#4Ñ#4°d·i±i·o±o×6QÑ6Qó
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r c ó> | j d uxr | j d uS r )r r r# s r r& zAbstractEngine._is_alignedV s# à× Ñ ¨Ð,ÒM°×1AÑ1AÈÐ1MÐMr c ó y)a
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Return an evaluated expression.
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Parameters
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----------
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env : Scope
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The local and global environment in which to evaluate an
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expression.
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Notes
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-----
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Must be implemented by subclasses.
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ð* òNó ðNð ×Ññ ó ñ r r )Ú metaclassc ó e Zd ZdZdZd Zy)Ú NumExprEnginezNumExpr engine classTc ó¾ dd l }| j « }| j j }|j }t | j « |j ||¬« S )Nr )Ú
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Evaluate an expression in Python space.
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Mostly for testing purposes.
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Fc ó" | j « S r )r r# s r r+ zPythonEngine.evaluate
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