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Hold an operator of arbitrary arity. r �opNzIterable[Term | Op])ri �operandsc C s t �||�| _|| _|| _d S )N)� _bool_op_map�getri rj r7 )r& ri rj r7 r) r) r* r% � s z Op.__init__c C s t | j�S )N)�iterrj )r& r) r) r* �__iter__� s z Op.__iter__)r? c C s( dd� | j D �}td| j� d��|��S )zW Print a generic n-ary operator and its operands using infix notation. c s s | ]}d t |�� d�V qdS )�(rV N)r )�.0Zoprr) r) r* � <genexpr>� s z Op.__repr__.<locals>.<genexpr>� )rj r ri �join)r& Zparenedr) r) r* rC � s z Op.__repr__c C s, | j tt krtjS tdd� t�| �D �� S )Nc s s | ] }|j V qd S )N)rU )rp �termr) r) r* rq � s z!Op.return_type.<locals>.<genexpr>)ri � CMP_OPS_SYMS� BOOL_OPS_SYMSrY �bool_r �com�flatten)r& r) r) r* r` � s zOp.return_typer9 c C s( | j }tt�d�g�}| jtko&|| S )N�object)� operand_types� frozensetrY rS r` rz )r& �typesZ obj_dtype_setr) r) r* �has_invalid_return_type� s zOp.has_invalid_return_typec C s t dd� t�| �D ��S )Nc s s | ] }|j V qd S )N)rU )rp rt r) r) r* rq � s z#Op.operand_types.<locals>.<genexpr>)r| rx ry )r& r) r) r* r{ � s zOp.operand_typesc C s t dd� | jD ��S )Nc s s | ] }|j V qd S )N)r )rp �operandr) r) r* rq � s z Op.is_scalar.<locals>.<genexpr>)�allrj )r& r) r) r* r � s z Op.is_scalarc C s8 y | j j}W n tk r& | j }Y nX t|ttjf�S )N)r` rU rT rX r rY rZ )r& r[ r) r) r* r\ � s zOp.is_datetime)N)r+ r, r- r. r^ r% rn rC r_ r` r~ r{ r r\ r) r) r) r* rh � s rh c C sP y | � |�S tk rJ t| �rBy |� | �S tk r@ Y nX | |kS X dS )z` Compute the vectorized membership of ``x in y`` if possible, otherwise use Python. N)�isinrT r )�x�yr) r) r* �_in s r� c C sT y | � |� S tk rN t| �rFy |� | � S tk rD Y nX | |kS X dS )zd Compute the vectorized membership of ``x not in y`` if possible, otherwise use Python. N)r� rT r )r� r� r) r) r* �_not_in s r� )�>�<z>=z<=z==z!=�inznot in)rc rd rf rg )�+�-�*�/z**z//�%)z**z//r� c C sd t �|�}xT| D ]L}|j|kr qy|j�|�}W n tk rP |�|j�}Y nX |�|� qW dS )a$ Cast an expression inplace. Parameters ---------- terms : Op The expression that should cast. acceptable_dtypes : list of acceptable numpy.dtype Will not cast if term's dtype in this list. dtype : str or numpy.dtype The dtype to cast to. N)rY rS rU rD ZastyperT rL )Zterms�acceptable_dtypesrS �dtrt rP r) r) r* � _cast_inplaceR s r� r9 )r? c C s t | t�S )N)r1 r0 )�objr) r) r* �is_termk s r� c sL e Zd ZdZdd�� fdd� Zdd� Zdd�d d �Zd d � Zd d� Z� Z S )�BinOpz� Hold a binary operator and its operands. Parameters ---------- op : str lhs : Term or Op rhs : Term or Op r )ri c s� t � �|||f� || _|| _| �� | �� yt| | _W nH tk r� } z*t t� � �}t dt |�� d|� ��|�W d d }~X Y nX d S )NzInvalid binary operator z, valid operators are ) r$ r% �lhs�rhs� _disallow_scalar_only_bool_ops�convert_values�_binary_ops_dict�func�KeyError�list�keys� ValueErrorr# )r& ri r� r� �errr� )r( r) r* r% z s zBinOp.__init__c C s | � |�}| �|�}| �||�S )z� Recursively evaluate an expression in Python space. Parameters ---------- env : Scope Returns ------- object The result of an evaluated expression. )r� r� r� )r& r5 �left�rightr) r) r* rG � s zBinOp.__call__)�enginec C s� |dkr| |�}nd| j j|||||d�}| jj|||||d�}| j|krZ| �|j|j�}n ddlm} | | |||d�}|�|�} || |d�S )al Evaluate a binary operation *before* being passed to the engine. Parameters ---------- env : Scope engine : str parser : str term_type : type eval_in_python : list Returns ------- term_type The "pre-evaluated" expression as an instance of ``term_type`` �python)r� �parser� term_type�eval_in_pythonr )�eval)Z local_dictr� r� )r5 ) r� rH r� ri r� rD Z pandas.core.computation.evalr� Zadd_tmp) r& r5 r� r� r� r� rO r� r� r� r! r) r) r* rH � s( zBinOp.evaluatec s� � fdd�}� j � j }}t|�r~|jr~t|�r~|jr~|j}t|ttf�rR||�}t t |��}|j dk rr|� d�}� j� |� t|�r�|jr�t|�r�|jr�|j}t|ttf�r�||�}t t |��}|j dk r�|� d�}� j � |� dS )zK Convert datetimes to a comparable value in an expression. c s& � j d k rtt� j d�}nt}|| �S )N)r7 )r7 r r r )rD �encoder)r& r) r* � stringify� s z'BinOp.convert_values.<locals>.stringifyN�UTC)r� r� r� r\ r rD r1 r] �floatr r �tzZ tz_convertrL )r& r� r� r� �vr) )r& r* r� � s$ zBinOp.convert_valuesc C sr | j }| j}|j}t|d|�}|j}t|d|�}|js<|jrn| jtkrnt|tt j f�rft|tt j f�snt d��d S )NrU z$cannot evaluate scalar only bool ops) r� r� r` �getattrr ri �_bool_ops_dictrX r9 rY rw rN )r& r� r� Zrhs_rtZlhs_rtr) r) r* r� � s z$BinOp._disallow_scalar_only_bool_ops) r+ r, r- r. r% rG rH r� r� r/ r) r) )r( r* r� o s 1!r� c C s t t�| �jtj�S )N)rX rY rS rU �number)rS r) r) r* � isnumeric s r� c s e Zd ZdZ� fdd�Z� ZS )�Divz� Div operator to special case casting. Parameters ---------- lhs, rhs : Term or Op The Terms or Ops in the ``/`` expression. c sj t � �d||� t|j�r$t|j�sFtd| j� d|j� d|j� d���tjtjg}t t � | �|tj� d S )Nr� z unsupported operand type(s) for z: 'z' and '�') r$ r% r� r` � TypeErrorri rY Zfloat32Zfloat_r� rx ry )r& r� r� r� )r( r) r* r% s z Div.__init__)r+ r, r- r. r% r/ r) r) )r( r* r� s r� )r� r� rb re c sN e Zd ZdZdd�� fdd� Zdd� Zdd�d d �Zed d�d d ��Z� Z S )�UnaryOpaK Hold a unary operator and its operands. Parameters ---------- op : str The token used to represent the operator. operand : Term or Op The Term or Op operand to the operator. Raises ------ ValueError * If no function associated with the passed operator token is found. r )ri c sf t � �||f� || _yt| | _W n< tk r` } z tdt|�� dt� ��|�W d d }~X Y nX d S )NzInvalid unary operator z, valid operators are ) r$ r% r �_unary_ops_dictr� r� r� r# �UNARY_OPS_SYMS)r& ri r r� )r( r) r* r% 9 s zUnaryOp.__init__c C s | � |�}| �|�S )N)r r� )r& r5 r r) r) r* rG E s zUnaryOp.__call__)r? c C s t | j� d| j� d��S )Nro rV )r ri r )r& r) r) r* rC I s zUnaryOp.__repr__znp.dtypec C sR | j }|jt�d�kr t�d�S t|t�rH|jtks>|jtkrHt�d�S t�d�S )Nr9 r] ) r r` rY rS r1 rh ri � _cmp_ops_dictr� )r& r r) r) r* r` L s zUnaryOp.return_type) r+ r, r- r. r% rG rC r_ r` r/ r) r) )r( r* r� ( s r� c s2 e Zd Z� fdd�Zdd� Zdd�dd�Z� ZS ) �MathCallc s t � �|j|� || _d S )N)r$ r% r! r� )r& r� rE )r( r) r* r% Y s zMathCall.__init__c s8 � fdd�| j D �}tjdd�� | jj|� S Q R X d S )Nc s g | ] }|� ��qS r) r) )rp ri )r5 r) r* � <listcomp>_ s z%MathCall.__call__.<locals>.<listcomp>�ignore)r� )rj rY Zerrstater� )r& r5 rj r) )r5 r* rG ] s zMathCall.__call__r )r? c C s( t t| j�}t| j� dd�|�� d��S )Nro �,rV )�mapr rj r ri rs )r& rj r) r) r* rC c s zMathCall.__repr__)r+ r, r- r% rG rC r/ r) r) )r( r* r� X s r� c @ s" e Zd Zdd�dd�Zdd� ZdS )�FuncNoder )r! c C s. |t krtd|� d���|| _tt|�| _d S )N�"z " is not a supported function)�MATHOPSr� r! r� rY r� )r& r! r) r) r* r% i s zFuncNode.__init__c G s t | |�S )N)r� )r& rE r) r) r* rG o s zFuncNode.__call__N)r+ r, r- r% rG r) r) r) r* r� h s r� )Xr. � __future__r r � functoolsr �operator�typingr r �numpyrY Zpandas._libs.tslibsr Zpandas.core.dtypes.commonr r Zpandas.core.common�core�commonrx Z pandas.core.computation.commonr r Z pandas.core.computation.scoper Zpandas.io.formats.printingr r Z REDUCTIONSZ_unary_math_opsZ_binary_math_opsr� r< � NameErrorr r0 r2 rk rh r� r� ru �gt�lt�ge�le�eq�neZ_cmp_ops_funcs�dict�zipr� rv �and_�or_Z_bool_ops_funcsr� ZARITH_OPS_SYMS�add�sub�mul�truediv�pow�floordiv�modZ_arith_ops_funcsZ_arith_ops_dictZSPECIAL_CASE_ARITH_OPS_SYMSZ _special_case_arith_ops_funcsZ _special_case_arith_ops_dictr� �drL r� r� r� r� r� r� �pos�neg�invertZ_unary_ops_funcsr� r� r� r� r) r) r) r* �<module> s� m 6 0
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