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B �5�g� � @ s� U d Z ddlmZ ddlZddlmZmZ ddlmZ ddl m Z m Z ddl m m mZ ee e �ZG dd� de�Zd d d �d d �ZG dd� dejd�ZG dd� de�ZG dd� de�Zeed�Zded< dS )z) Engine classes for :func:`~pandas.eval` � )� annotationsN)� align_terms�reconstruct_object)�Expr)�MATHOPS� REDUCTIONSc @ s e Zd ZdS )�NumExprClobberingErrorN)�__name__� __module__� __qualname__� r r �U/home/digitalm-up/venv/lib/python3.7/site-packages/pandas/core/computation/engines.pyr s r r �None)�expr�returnc C s@ | j }|t@ }|r<d�dd� |D ��}td| � d|� d���dS )z� Attempt to prevent foot-shooting in a helpful way. Parameters ---------- expr : Expr Terms can contain z, c s s | ]}t |�V qd S )N)�repr)�.0�xr r r � <genexpr>( s z*_check_ne_builtin_clash.<locals>.<genexpr>zVariables in expression "z" overlap with builtins: (�)N)�names� _ne_builtins�joinr )r r �overlap�sr r r �_check_ne_builtin_clash s r c @ sX e Zd ZdZdZdd� Zdd�dd�Zd d�d d �Zed d�d d��Z e j dd� �Z dS )�AbstractEnginez/Object serving as a base class for all engines.Fc C s || _ d | _d | _d S )N)r � aligned_axes� result_type)�selfr r r r �__init__3 s zAbstractEngine.__init__�str)r c C s t �| j�S )zo Convert an expression for evaluation. Defaults to return the expression as a string. )�printingZ pprint_thingr )r r r r �convert8 s zAbstractEngine.convert�objectc C s: | j st| jj�\| _| _| �� }t| j|| j| jjj�S )a* Run the engine on the expression. This method performs alignment which is necessary no matter what engine is being used, thus its implementation is in the base class. Returns ------- object The result of the passed expression. ) � _is_alignedr r Ztermsr r � _evaluater � return_type)r �resr r r �evaluate@ s zAbstractEngine.evaluate�boolc C s | j d k o| jd k S )N)r r )r r r r r% U s zAbstractEngine._is_alignedc C s dS )a Return an evaluated expression. Parameters ---------- env : Scope The local and global environment in which to evaluate an expression. Notes ----- Must be implemented by subclasses. Nr )r r r r r& Y s zAbstractEngine._evaluateN) r r r �__doc__� has_neg_fracr r# r) �propertyr% �abc�abstractmethodr& r r r r r . s r )� metaclassc @ s e Zd ZdZdZdd� ZdS )� NumExprEnginezNumExpr engine classTc C s6 dd l }| �� }| jj}|j}t| j� |j||d�S )Nr )Z local_dict)�numexprr# r �envZ full_scoper r) )r �ner r3 �scoper r r r& p s zNumExprEngine._evaluateN)r r r r+ r, r& r r r r r1 k s r1 c @ s* e Zd ZdZdZdd� Zdd�dd�Zd S ) � PythonEnginezS Evaluate an expression in Python space. Mostly for testing purposes. Fc C s | � � S )N)r )r r r r r) � s zPythonEngine.evaluater )r c C s d S )Nr )r r r r r& � s zPythonEngine._evaluateN)r r r r+ r, r) r& r r r r r6 | s r6 )r2 �pythonz dict[str, type[AbstractEngine]]�ENGINES)r+ � __future__r r. Z pandas.core.computation.alignr r Z pandas.core.computation.exprr Zpandas.core.computation.opsr r Zpandas.io.formats.printing�io�formatsr" � frozensetr � NameErrorr r �ABCMetar r1 r6 r8 �__annotations__r r r r �<module> s =
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