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B �5�g/( � @ s� d Z ddlmZ ddlZddlZddlmZ ddlZddlZddl Z ddl Z ddl Z ddl mZ ddlmZ ddd d �d d �Zd d�dd�Zd d�dd�Zeejddeee je jd�Zd d�dd�ZG dd � d �ZdS )z Module for scope operations � )� annotationsN)�StringIO)� Timestamp)� DeepChainMap� �int�Scope)�level�returnc K s t | d ||||d�S )z.Ensure that we are grabbing the correct scope.� )� global_dict� local_dict� resolvers�target)r )r r r r r �kwargsr r �S/home/digitalm-up/venv/lib/python3.7/site-packages/pandas/core/computation/scope.py� ensure_scope s r �str)r c C s. y t | �}W n tk r$ | }Y nX t|�S )z� Replace a number with its hexadecimal representation. Used to tag temporary variables with their calling scope's id. )�ord� TypeError�hex)�xZhexinr r r � _replacer! s r c C s$ t �dt| ��}d�dd� |D ��S )z,Return the padded hexadecimal id of ``obj``.z@P� c s s | ]}t |�V qd S )N)r )�.0r r r r � <genexpr>5 s z _raw_hex_id.<locals>.<genexpr>)�struct�pack�id�join)�obj�packedr r r � _raw_hex_id1 s r" TF)r �datetime�True�False�list�tuple�infZInfc C s t � }tj| |d� |�� S )z� Return a prettier version of obj. Parameters ---------- obj : object Object to pretty print Returns ------- str Pretty print object repr )�stream)r �pprint�getvalue)r �sior r r �_get_pretty_stringD s r- c @ s� e Zd ZU dZdddddgZded< ded< ded< d ed< d*dd �d d�Zdd�dd�Zedd�dd��Z ddd�dd�Z d+dddd�dd �Z d dd �d d �Z ddd!�d"d#�Z dd�d$d%�Zedd�d&d'��Zedd�d(d)��Zd S ),r a� Object to hold scope, with a few bells to deal with some custom syntax and contexts added by pandas. Parameters ---------- level : int global_dict : dict or None, optional, default None local_dict : dict or Scope or None, optional, default None resolvers : list-like or None, optional, default None target : object Attributes ---------- level : int scope : DeepChainMap target : object temps : dict r �scoper r �tempsr r �dictNr )r c C s� |d | _ tt�� �| _|| _t|t�rT| j�|j� |jd k rH|j| _| � |j � t � | j �}z>| j� |pp|j �� �| _t|t�s�| j� |p�|j�� �| _W d ~X t|t�r�|t|jj�7 }t|� | _i | _d S )Nr )r r �DEFAULT_GLOBALS�copyr. r � isinstancer �update�_update�sys� _getframe� new_child� f_globals�f_localsr' r �mapsr/ )�selfr r r r r �framer r r �__init__r s( zScope.__init__r )r c C s@ t t| j�� ��}t t| j�� ��}t| �j� d|� d|� d�S )Nz(scope=z , resolvers=�))r- r& r. �keysr �type�__name__)r< Z scope_keysZres_keysr r r �__repr__� s zScope.__repr__�boolc C s t t| j��S )z� Return whether we have any extra scope. For example, DataFrames pass Their columns as resolvers during calls to ``DataFrame.eval()`` and ``DataFrame.query()``. Returns ------- hr : bool )rD �lenr )r< r r r � has_resolvers� s zScope.has_resolvers)�key�is_localc C s� y6|r| j | S | jr | j| S |s*| jr.t�| j | S tk r� y | j| S tk r� } z ddlm} |||�|�W dd}~X Y nX Y nX dS )a� Resolve a variable name in a possibly local context. Parameters ---------- key : str A variable name is_local : bool Flag indicating whether the variable is local or not (prefixed with the '@' symbol) Returns ------- value : object The value of a particular variable r )�UndefinedVariableErrorN)r. rF r �AssertionError�KeyErrorr/ Zpandas.core.computation.opsrI )r< rG rH �errrI r r r �resolve� s z Scope.resolve�None)�old_key�new_keyr c C sR | j r| jj| jj }n| jj}|�| j� x |D ]}||kr2|||< dS q2W dS )a] Replace a variable name, with a potentially new value. Parameters ---------- old_key : str Current variable name to replace new_key : str New variable name to replace `old_key` with new_value : object Value to be replaced along with the possible renaming N)rF r r; r. �appendr/ )r< rO rP � new_valuer; �mappingr r r �swapkey� s z Scope.swapkeyz list[str])�scopesr c C sT t �||�}xB|D ]:\}\}}}}}}z t|d| �}| j�|�| _W d~X qW dS )a� Get specifically scoped variables from a list of stack frames. Parameters ---------- stack : list A list of stack frames as returned by ``inspect.stack()`` scopes : sequence of strings A sequence containing valid stack frame attribute names that evaluate to a dictionary. For example, ('locals', 'globals') Zf_N)� itertools�product�getattrr. r8 )r< �stackrU � variablesr. r= �_�dr r r � _get_vars� s zScope._get_vars)r r c C s@ |d }t �� }z | j|d|� dgd� W d|dd�= ~X dS )z� Update the current scope by going back `level` levels. Parameters ---------- level : int r N�locals)rU )�inspectrY r] )r< r �slrY r r r r5 s z Scope._updatec C sJ t |�j� d| j� dt| �� �}|| jks.t�|| j|< || jksFt�|S )a# Add a temporary variable to the scope. Parameters ---------- value : object An arbitrary object to be assigned to a temporary variable. Returns ------- str The name of the temporary variable created. r[ )rA rB �ntempsr" r/ rJ )r< �value�namer r r �add_tmp! s z Scope.add_tmpc C s t | j�S )z/The number of temporary variables in this scope)rE r/ )r< r r r ra 9 s z Scope.ntempsc C s | j g| jj | jj }t|� S )z� Return the full scope for use with passing to engines transparently as a mapping. Returns ------- vars : DeepChainMap All variables in this scope. )r/ r r; r. r )r< r; r r r � full_scope> s zScope.full_scope)NNr N)N)rB � __module__� __qualname__�__doc__� __slots__�__annotations__r> rC �propertyrF rM rT r] r5 rd ra re r r r r r W s **)NNr N)rh � __future__r r# r_ �ior rV r* r r6 �numpy�npZpandas._libs.tslibsr Zpandas.compat.chainmapr r r r" r& r' r( r1 r- r r r r r �<module> s0
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