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B �5�g>h � @ s d Z ddlmZmZmZmZmZmZmZm Z ddlm Z ddl Z ddl Z ddl mZmZmZmZmZ ddlmZmZ e jjjZe jj Z dddd d d gZ d d ddgZ d"dd�Z dd� Z G dd� de�Z!dd� Z"e!Z#d#dd�Zddddddddef dd �Zdd� Z$d d � Z%d$d d �Z&d%d!d �Z'dS )&a, :mod:`numpy.ma..mrecords` Defines the equivalent of :class:`numpy.recarrays` for masked arrays, where fields can be accessed as attributes. Note that :class:`numpy.ma.MaskedArray` already supports structured datatypes and the masking of individual fields. .. moduleauthor:: Pierre Gerard-Marchant � )�MAError� MaskedArray�masked�nomask� masked_array�getdata� getmaskarray�filledN)�bool_�dtype�ndarray�recarray�array)� fromarrays� fromrecords� MaskedRecords� mrecarrayr r � fromtextfile�addfield�_data�_mask� _fieldmaskr c C s� t | �}dd� t|�D �}|dkr(|}nXt|ttf�r<|}n$t|t�rR|�d�}ntd|����t |�}||k r�|||d� 7 }g }xbt||| j �D ]P\}}}|t kr�|d t kr�|� ||d f� q�|� |� q�|� ||d f� q�W t � |�S )z� Checks that field names ``descr`` are not reserved keywords. If this is the case, a default 'f%i' is substituted. If the argument `names` is not None, updates the field names to valid names. c S s g | ] }d | �qS )zf%i� )�.0�ir r �G/home/digitalm-up/venv/lib/python3.7/site-packages/numpy/ma/mrecords.py� <listcomp>6 s z _checknames.<locals>.<listcomp>N�,zillegal input names r � )�len�range� isinstance�tuple�list�str�split� NameError�zip�descr�reserved_fields�append�npr ) r( �namesZndescr� default_namesZ new_namesZnnames�n�d�tr r r � _checknames- s( r1 c C s: dd� | j jD �}tj| j|d�}tdgt|� �|_|S )Nc S s g | ] }|d f�qS )z|b1r )r r. r r r r P s z"_get_fieldmask.<locals>.<listcomp>)r F)r r, r+ �empty�shaper" r �flat)�self�mdescrZfdmaskr r r �_get_fieldmaskO s r7 c @ s� e Zd ZdZdddddddddeddddfdd�Zdd � Zed d � �Zed d � �Z dd� Z dd� Z dd� Z dd� Z dd� Zdd� Zdd� Zd,d d �Zd d � Zd d!� Zd"d#� Zd-d$d%�Zd&d'� Zd(d)� Zd*d+� ZdS ).r a� Attributes ---------- _data : recarray Underlying data, as a record array. _mask : boolean array Mask of the records. A record is masked when all its fields are masked. _fieldmask : boolean recarray Record array of booleans, setting the mask of each individual field of each record. _fill_value : record Filling values for each field. Nr FTc s t j| ||||||||| | d� }t�|j�� | tks>t�| �sX|sVtdgt � � �|_ n�tj | |d�} | j |j kr�|j| j }}|dkr�t� | |j �} n,||kr�t�| |j �} nd}t|||f ��d}|s�|�| � d|_n2| j� kr�| }n tj � fdd�| D �� d �}||_ |S ) N) r �buf�offset�strides�formatsr, �titles� byteorder�alignedF)�copyr z?Mask and data not compatible: data size is %i, mask size is %i.Tc s g | ]}t |gt� � ��qS r )r" r )r �m)�mdtyper r r � s z)MaskedRecords.__new__.<locals>.<listcomp>)r )r �__new__�ma�make_mask_descrr r r+ �sizer" r r r r3 �resizeZreshaper � __setmask__� _sharedmask)�clsr3 r r8 r9 r: r; r, r< r= r> �maskZ hard_mask� fill_valueZ keep_maskr? �optionsr5 �nd�nm�msgr r )rA r rB h s6 zMaskedRecords.__new__c s� t |dd �}|d krpt |dt�}t�| d�}|tkrFtj| j|d�}n*t�|�� t� fdd�|D �� d�� t �}| j }|j |d� | � |� |d tkr�t |d< d S )Nr r )r c s g | ]}t |gt� � ��qS r )r" r )r r@ )r6 r r r � s z4MaskedRecords.__array_finalize__.<locals>.<listcomp>)r � _baseclass)�getattrr r �__getattribute__rC Zmake_mask_noner3 rD �narray�viewr �__dict__�update� _update_from)r5 �objr ZobjmaskZ_dtype�_dictr )r6 r �__array_finalize__� s z MaskedRecords.__array_finalize__c C s t �| t�S )z2 Returns the data as a recarray. )r rT r )r5 r r r r � s zMaskedRecords._datac C s | j S )z! Alias to mask. )r )r5 r r r r � s zMaskedRecords._fieldmaskc C s | j rt| j�S t| j�S )z% Returns the length )�ndimr r r )r5 r r r �__len__� s zMaskedRecords.__len__c C s� y t �| |�S tk r Y nX t�| d�j}y|| d d� }W n6 ttfk rz } ztd|� ��|�W d d }~X Y nX t�| d�}t�| |d �}|j|� }|j j d k r�t d��d}|� dd �} | d k �ry | | } W n t k r� Y nX t| j �} | �t| �r| fnd f��� }|j�s(|�r�|�t�}t|_d |_| |_|� d d �} | d k �r�y| | |_W n tk �r� d |_Y nX n|�� }|S ) Nr � z record array has no attribute rU rP z4MaskedRecords is currently limited tosimple records.Fr r T� _fill_value)�objectrR �AttributeErrorr �fields� TypeError�KeyErrorrT �getfieldr r, �NotImplementedError�get� IndexErrorr �bool�anyr3 r rP Z_isfieldr r^ � ValueError�item) r5 �attr� fielddict�res�e� _localdictr rX Z hasmaskedr Ztp_lenr^ r r r rR � sJ z MaskedRecords.__getattribute__c C s� |dkr| � |� dS t�| d�}||k}yt�| ||�}W nH tk r� t�| d�jp\i }t�| d�pli }||ks�||ks�� Y nJX t�| d�jp�i }||kr�|S |r�yt�| |� W n tk r� |S X y|| dd� }W n8 tt fk �r } zt d|� ��| �W dd} ~ X Y nX |t k�rP|d } | dk �rF|d | } n|} d } nt |�} t |�} t�| d �j| f|�� } |d �|| � | S ) z< Sets the attribute attr to the value val. )rJ Z fieldmaskNrU r Z_optinfor] z record array has no attribute r^ Tr r )rG r_ rR � __setattr__� Exceptionr ra � __delattr__rb rc r` r r r �setfield� __setitem__)r5 rl �valrp Znewattr�retrm Zoptinforn ro r^ �dvalZmvalrX r r r rq � sH zMaskedRecords.__setattr__c C s� | j }t�| d�}t�| |d �}t|t�rx|| �t�}|| |_d|_|d }|dk rd|| |_ |j st|jrtt S |S t j || dd��t�}t j || dd��t�|_|S )z� Returns all the fields sharing the same fieldname base. The fieldname base is either `_data` or `_mask`. r rP Tr^ NF)r? )rU r rR rT r! r$ r r rH r^ r[ r r+ r r r )r5 �indxrp r r rX Zfvalr r r � __getitem__' s zMaskedRecords.__getitem__c C s, t �| ||� t|t�r(t�|�| j|< dS )z2 Sets the given record to value. N)r ru r! r$ rC r r )r5 ry �valuer r r ru G s zMaskedRecords.__setitem__c sz � j dkr@dd� t� fdd�� jjD �� D �}dd�|�� d�S dd� t� fd d�� jjD ��D �}d d�|�� d �S d S ) z8 Calculates the string representation. r c S s( g | ] }d d� dd� |D ��� d��qS )�(r c S s g | ] }t |��qS r )r$ )r r r r r r V s z4MaskedRecords.__str__.<locals>.<listcomp>.<listcomp>�))�join)r �sr r r r V s z)MaskedRecords.__str__.<locals>.<listcomp>c s g | ]}t � |��qS r )rQ )r �f)r5 r r r W s �[z, �]c S s" g | ]}d � dd� |D ��� �qS )r c S s g | ] }t |��qS r )r$ )r r r r r r Z s z4MaskedRecords.__str__.<locals>.<listcomp>.<listcomp>)r~ )r r r r r r Z s c s g | ]}t � |��qS r )rQ )r r� )r5 r r r [ s r| r} N)rE r' r r, r~ )r5 Zmstrr )r5 r �__str__P s zMaskedRecords.__str__c sn �j j}dtdd� |D ��d f � � �fdd��j jD �}|�dd� |�� d�jf d g� td �|��S ) z6 Calculates the repr representation. z %%%is : %%sc S s g | ] }t |��qS r )r )r r. r r r r d s z*MaskedRecords.__repr__.<locals>.<listcomp>� c s g | ]}� |t �|�f �qS r )rQ )r r� )�fmtr5 r r r e s r zmasked_records(z fill_valuez )� )r r, �max�insert�extendrK r$ r~ )r5 Z_namesZreprstrr )r� r5 r �__repr__^ s zMaskedRecords.__repr__c C s |dkr*|dkr t �| �}q�t �| |�}n�|dkr�y,t|t �rPt �| |�}d}n t �| |�}W q� tk r� t�|�}|jdkr�| jjd }| � � �||�}|� | � n t �| |�}d|_ Y q�X nt �| ||�}t |dt �t k �r t�|j�}| j�|t �|_|j|j_|S )z3 Returns a view of the mrecarray. Nr r )r rT � issubclassrb r+ r ra � __class__� __bases__Z __array__rW r^ rQ r rC rD r r3 )r5 r �type�output�basetyperA r r r rT k s0 zMaskedRecords.viewc C s d| _ dS )z+ Forces the mask to hard. TN)� _hardmask)r5 r r r � harden_mask� s zMaskedRecords.harden_maskc C s d| _ dS )z* Forces the mask to soft FN)r� )r5 r r r � soften_mask� s zMaskedRecords.soften_maskc C s$ | j �� �t| ��}| j�� |_|S )z7 Returns a copy of the masked record. )r r? rT r� r )r5 �copiedr r r r? � s zMaskedRecords.copyc C sH |dk r| � |��� S t| � � �� td�}t| j�� �}d||< |�� S )a Return the data portion of the array as a list. Data items are converted to the nearest compatible Python type. Masked values are converted to fill_value. If fill_value is None, the corresponding entries in the output list will be ``None``. N)r )r �tolistrS r_ r )r5 rK �resultrJ r r r r� � s zMaskedRecords.tolistc C s, d| j | j| jj| j�� | j�� | jf}|S )zWReturn the internal state of the masked array. This is for pickling. r )r3 r �flagsZfncr �tobytesr r^ )r5 �stater r r � __getstate__� s zMaskedRecords.__getstate__c C s^ |\}}}}}}}t �| ||||f� tdd� | jjD ��} | jd �|| ||f� || _dS )at Restore the internal state of the masked array. This is for pickling. ``state`` is typically the output of the ``__getstate__`` output, and is a 5-tuple: - class name - a tuple giving the shape of the data - a typecode for the data - a binary string for the data - a binary string for the mask. c S s g | ]\}}|t f�qS r )r )r �k�_r r r r � s z.MaskedRecords.__setstate__.<locals>.<listcomp>r N)r � __setstate__r r( rU rK ) r5 r� �verZshp�typZisf�rawZmskZflvrA r r r r� � s zMaskedRecords.__setstate__c C s t | j| jddf| �� fS )z? Return a 3-tuple for pickling a MaskedArray. )r �b)�_mrreconstructr� rP r� )r5 r r r � __reduce__� s zMaskedRecords.__reduce__)NN)N)�__name__� __module__� __qualname__�__doc__r rB rZ �propertyr r r\ rR rq rz ru r� r� rT r� r� r? r� r� r� r� r r r r r V s0 % /8 ) c C s4 t �|||��| �}t �t |d�}| j| |||d�S )zK Build a new MaskedArray from the information stored in a pickle. �b1)rJ r )r rB rT )�subtypeZ baseclassZ baseshaper� r r r r r r� � s r� Fc C s\ dd� | D �} dd� | D �} t | |||||||d��t�} tt| � �| j_|dk rX|| _| S )a Creates a mrecarray from a (flat) list of masked arrays. Parameters ---------- arraylist : sequence A list of (masked) arrays. Each element of the sequence is first converted to a masked array if needed. If a 2D array is passed as argument, it is processed line by line dtype : {None, dtype}, optional Data type descriptor. shape : {None, integer}, optional Number of records. If None, shape is defined from the shape of the first array in the list. formats : {None, sequence}, optional Sequence of formats for each individual field. If None, the formats will be autodetected by inspecting the fields and selecting the highest dtype possible. names : {None, sequence}, optional Sequence of the names of each field. fill_value : {None, sequence}, optional Sequence of data to be used as filling values. Notes ----- Lists of tuples should be preferred over lists of lists for faster processing. c S s g | ] }t |��qS r )r )r �xr r r r s z fromarrays.<locals>.<listcomp>c S s g | ]}t �t|���qS r )r+ Z atleast_1dr )r r� r r r r s )r r3 r; r, r< r> r= N)� recfromarraysrT r r# r' r r4 rK ) Z arraylistr r3 r; r, r< r> r= rK ZdatalistZmasklistZ_arrayr r r r � s c C s� t | dd�} t| t�rDt| t�r.| �� �t�} |dkr<| j}| �� } t| |||||||d��t �} |dk rp|| _ | t k r�t j | dd�} t| j�} | r�| | j_n(| jdkr�dd� | D �| j_n | �| � | dk r�| | jdd�< | S ) aN Creates a MaskedRecords from a list of records. Parameters ---------- reclist : sequence A list of records. Each element of the sequence is first converted to a masked array if needed. If a 2D array is passed as argument, it is processed line by line dtype : {None, dtype}, optional Data type descriptor. shape : {None,int}, optional Number of records. If None, ``shape`` is defined from the shape of the first array in the list. formats : {None, sequence}, optional Sequence of formats for each individual field. If None, the formats will be autodetected by inspecting the fields and selecting the highest dtype possible. names : {None, sequence}, optional Sequence of the names of each field. fill_value : {None, sequence}, optional Sequence of data to be used as filling values. mask : {nomask, sequence}, optional. External mask to apply on the data. Notes ----- Lists of tuples should be preferred over lists of lists for faster processing. r N)r r3 r; r, r< r> r= F)r? r] c S s g | ] }t |��qS r )r" )r r@ r r r r _ s z fromrecords.<locals>.<listcomp>)rQ r! r r r rT r r� �recfromrecordsr rK r r+ r r r r4 r[ rG ) Zreclistr r3 r; r, r< r> r= rK rJ r ZmrecZmaskrecordlengthr r r r & s. " c C s� g }t �| �} | jdkr"| d } n| jdkr4td��x�| D ]�}y t|� W n� ttfk r� y t|� W nZ ttfk r� y t|� W n$ ttfk r� |�| j � Y nX |�t � t�� Y nX |�t � t�� Y q:X |�t � t�� q:W |S )a. Tries to guess the dtypes of the str_ ndarray `arr`. Guesses by testing element-wise conversion. Returns a list of dtypes. The array is first converted to ndarray. If the array is 2D, the test is performed on the first line. An exception is raised if the file is 3D or more. r] r z The array should be 2D at most!) r+ Zasarrayr[ rj �intrb �float�complexr* r )Zarr�vartypesr� r r r �_guessvartypesg s* r� c C s� t | d�r| S y t| �}W n4 tk rN } ztd| � d��|�W dd}~X Y nX |�� dd� dkrt|�dd� |S |�� td��dS ) z1 Opens the file handle of file `fname`. �readlinezNo such file: '�'Nr] z\xr zWow, binary file)�hasattr�open�IOErrorr� �seek�closere )�fnamer� ro r r r �openfile� s $ r� �#� c s. t | �}x:|�� }|d|�� �� �� }|���} t| �dkr P q W |dkrP| }t� �fdd�|D ��} | j\} } |�� |dkr�t | d �}nLdd� |D �}t|�| kr�d} | d7 } t j | t|�| f d d � t | d �}d d� t ||�D �}d d� |D �}| j |k}d d� t | j |||�D �}t||d�S )a� Creates a mrecarray from data stored in the file `filename`. Parameters ---------- fname : {file name/handle} Handle of an opened file. delimitor : {None, string}, optional Alphanumeric character used to separate columns in the file. If None, any (group of) white spacestring(s) will be used. commentchar : {'#', string}, optional Alphanumeric character used to mark the start of a comment. missingchar : {'', string}, optional String indicating missing data, and used to create the masks. varnames : {None, sequence}, optional Sequence of the variable names. If None, a list will be created from the first non empty line of the file. vartypes : {None, sequence}, optional Sequence of the variables dtypes. If None, it will be estimated from the first non-commented line. Ultra simple: the varnames are in the header, one lineNr c s2 g | ]*}|d � krt |�dkr|�� ����qS )r r )r �stripr% )r �line)� commentchar� delimitorr r r � s z fromtextfile.<locals>.<listcomp>r c S s g | ]}t �|��qS r )r+ r )r �vr r r r � s z&Attempting to %i dtypes for %i fields!z Reverting to default.r] )� stacklevelc S s g | ]\}}||f�qS r r )r r. r� r r r r � s c S s g | ]}t �|��qS r )rC Zdefault_fill_value)r r� r r r r � s c S s$ g | ] \}}}}t ||||d ��qS ))rJ r rK )r )r �ar@ r0 r� r r r r � s )r )r� r� �findr� r% r r r3 r� r� �warnings�warnr' �Tr )r� r� r� Z missingchar�varnamesr� Zftextr� � firstlineZ _varnamesZ _variablesr� ZnfieldsrO r6 Zmfillvr Z _datalistr )r� r� r r � s4 c s� | j � | j�|dks |tkr*dt� j� }t�|�}t�� jj||jfg �}t � j |��� �fdd�� jj � � D � �j |j f�jj | �� ��t��t�dd� |jD ��}t � j |����fdd��jj � � D � �j t|�f�jj | �� ��_�S )z�Adds a new field to the masked record array Uses `newfield` as data and `newfieldname` as name. If `newfieldname` is None, the new field name is set to 'fi', where `i` is the number of existing fields. Nzf%ic s" g | ]}�j � j|� f|�� �qS r )rt rd )r r� )r �newdatar r r � s z addfield.<locals>.<listcomp>c S s g | ] }|t f�qS r )r )r r. r r r r � s c s" g | ]}�j � j|� f|�� �qS r )rt rd )r r� )r �newmaskr r r s )r r r) r r rC r r+ r( r r3 ra �valuesrt rT r r, r )ZmrecordZnewfieldZ newfieldnameZnewdtypeZ newmdtyper )r r r� r� r r � s& )N)NNNNNFNN)Nr� r� NN)N)(r� Znumpy.mar r r r r r r r rC r� �numpyr+ r r r r r rS Znumpy.core.recordsr r� r r� �core�recordsZ_byteorderconvZ_check_fill_value�__all__r) r1 r7 r r� r r� r� r r r r r r �<module> s< ( " )?% C
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