Edit File: mrecords.cpython-37.pyc
B ��Fdk � @ sh d Z ddlmZmZmZ ddlZddlZddlZddl m m Z ddl mZ ddlmZmZmZmZmZ ddlmZmZ ej jjZe j Z ddl m Z ddl m Z m Z m!Z!m"Z"m#Z#m$Z$m%Z%m&Z& e j j'Z'dd d d d d gZ(ddddgZ)dd� Z*d&dd�Z+dd� Z,G dd� de e-�Z.dd� Z/e.Z0d'd d �Zdddddddde"f d d �Zd d � Z1d d!� Z2d(d$d �Z3d)d%d �Z4dS )*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 � )�division�absolute_import�print_functionN)� basestring)�bool_�dtype�ndarray�recarray�array)� fromarrays� fromrecords)�MAError� MaskedArray�masked�nomask� masked_array�getdata� getmaskarray�filled� MaskedRecords� mrecarrayr r � fromtextfile�addfield�_data�_mask� _fieldmaskr c C s� t | d�r"d�dd� | jjD ��S d}xL| D ]D}t�|�}|t|jj 7 }t|jjt j �rh|t |j �7 }|d7 }q,W |dd� S )zR Returns the formats of arrays in arraylist as a comma-separated string. r �,c S s g | ] }|d �qS )� � )�.0�descr r �D/opt/alt/python37/lib64/python3.7/site-packages/numpy/ma/mrecords.py� <listcomp>9 s z _getformats.<locals>.<listcomp>� N���) �hasattr�joinr �descr�np�asarray�_typestr�type� issubclass�ntypesZflexible�repr�itemsize)�data�formats�objr r r! � _getformats3 s r3 c C s� t | �}dd� t|�D �}|dkr(|}nZt|ttf�r<|}n&t|t�rR|�d�}ntdt|� ��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%ir )r �ir r r! r" N s z _checknames.<locals>.<listcomp>Nr zillegal input names %sr r )�len�range� isinstance�tuple�list�str�split� NameErrorr. �zipr' �reserved_fields�appendr( r ) r' �namesZndescr� default_namesZ new_namesZnnames�n�d�tr r r! � _checknamesE s( rE c C s: dd� | j jD �}tj| j|d�}tdgt|� �|_|S )Nc S s g | ] }|d f�qS )z|b1r )r rB r r r! r" h s z"_get_fieldmask.<locals>.<listcomp>)r F)r r@ r( �empty�shaper8 r5 �flat)�self�mdescrZfdmaskr r r! �_get_fieldmaskg s rK c @ s� e Zd ZdZdddddddddeddddfdd�Zdd � Zd d � Zeed �Z d d� Z ee d �Z dd� Z dd� Z dd� Zdd� Zdd� 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�stridesr1 r@ �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 )r8 r5 )r �m)�mdtyper r! r" � s z)MaskedRecords.__new__.<locals>.<listcomp>)r )r �__new__�ma�make_mask_descrr r r( �sizer8 r5 r r rG �resizeZreshaper � __setmask__� _sharedmask)�clsrG r rL rM rN r1 r@ rO rP rQ �maskZ hard_mask� fill_valueZ keep_maskrR �optionsrI Znd�nm�msgr r )rT r! rU � 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 )r8 r5 )r rS )rJ r r! r" � s z4MaskedRecords.__array_finalize__.<locals>.<listcomp>)r � _baseclass)�getattrr r �__getattribute__rV Zmake_mask_nonerG rW �narray�viewr �__dict__�update� _update_from)rI r2 r ZobjmaskZ_dtype�_dictr )rJ r! �__array_finalize__� s z MaskedRecords.__array_finalize__c C s t �| t�S )z2 Returns the data as a recarray. )r rf r )rI r r r! �_getdata� s zMaskedRecords._getdata)�fgetc C s | j S )z! Alias to mask. )r )rI r r r! � _getfieldmask� s zMaskedRecords._getfieldmaskc C s | j rt| j�S t| j�S )z% Returns the length )�ndimr5 r r )rI r r r! �__len__� s zMaskedRecords.__len__c C sr y t �| |�S tk r Y nX t�| d�j}y|| d d� }W n$ ttfk rh td| ��Y nX t�| d�}t�| |d �}|j|� }|j jr�t d��d}|� dd �}|d k r�y || }W n t k r� Y nX |�t jt|j �p�d f��� }|j�s|�rf|�t�}t|_d |_||_|� d d �} | d k �rny| | |_W n tk �rb d |_Y nX n|�� }|S ) Nr � z record array has no attribute %srg rb z4MaskedRecords is currently limited tosimple records.Fr r T� _fill_value)�objectrd �AttributeErrorr �fields� TypeError�KeyErrorrf �getfieldr �NotImplementedError�get� IndexErrorr( �boolr5 �anyrG r rb Z_isfieldr rr � ValueError�item) rI �attr� fielddict�res� _localdictr r2 Z hasmaskedr rr r r r! rd � sF z MaskedRecords.__getattribute__c C s� |dkr| � |� dS t�| d�}||k}yt�| ||�}W nZ t�| d�jpTi }t�| d�pdi }||ks�||ks�t�� dd� \}} || ��Y n@X t�| d�jp�i }||kr�|S |r�yt�| |� W n |S y|| dd� } W n& t t fk �r t d| ��Y nX |t k�rF|d } | dk �r<|d | } n|} d } nt |�} t|�} t�| d �j| f| �� }|d �|| � |S ) z< Sets the attribute attr to the value val. )r] Z fieldmaskNrg r Z_optinforq z record array has no attribute %srr Tr r )rZ rs rd � __setattr__r ru �sys�exc_info� __delattr__rv rw rt r r r �setfield� __setitem__)rI r� �valr� Znewattr�retr� Zoptinfo�exctype�valuer� rr ZdvalZmvalr2 r r r! r� 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 rb Trr NF)rR )rg r rd rf r7 r r r r[ rr ro r r( r r r )rI �indxr� r r r2 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 r� r7 r rV r r )rI r� r� r r r! r� _ s zMaskedRecords.__setitem__c sr � j dkr<dd� t� fdd�� jjD �� D �}dd�|� S dd� t� fdd�� jjD ��D �}d d�|� S d S ) z8 Calculates the string representation. r c S s$ g | ] }d d� dd� |D �� �qS )z(%s)r c S s g | ] }t |��qS r )r: )r r4 r r r! r" n s z4MaskedRecords.__str__.<locals>.<listcomp>.<listcomp>)r& )r �sr r r! r" n s z)MaskedRecords.__str__.<locals>.<listcomp>c s g | ]}t � |��qS r )rc )r �f)rI r r! r" o s z[%s]z, c S s$ g | ] }d d� dd� |D �� �qS )z%sr c S s g | ] }t |��qS r )r: )r r4 r r r! r" r s z4MaskedRecords.__str__.<locals>.<listcomp>.<listcomp>)r& )r r� r r r! r" r s c s g | ]}t � |��qS r )rc )r r� )rI r r! r" s s z(%s)N)rX r= r r@ r& )rI Zmstrr )rI r! �__str__h 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 )r5 )r rB r r r! r" | s z*MaskedRecords.__repr__.<locals>.<listcomp>� c s g | ]}� |t �|�f �qS r )rc )r r� )�fmtrI r r! r" } s r zmasked_records(z fill_valuez )� )r r@ �max�insert�extendr^ r: r& )rI Z_namesZreprstrr )r� rI r! �__repr__v 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 rf r, rv r( r ru � __class__� __bases__Z __array__ri rr rc r rV rW r rG )rI r r+ �output�basetyperT r r r! rf � s0 zMaskedRecords.viewc C s d| _ dS )z+ Forces the mask to hard. TN)� _hardmask)rI r r r! � harden_mask� s zMaskedRecords.harden_maskc C s d| _ dS )z* Forces the mask to soft FN)r� )rI r r r! � soften_mask� s zMaskedRecords.soften_maskc C s$ | j �� �t| ��}| j�� |_|S )z7 Returns a copy of the masked record. )r rR rf r+ r )rI �copiedr r r! rR � 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 �tolistre rs r )rI r^ �resultr] 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 )rG r �flagsZfncr �tobytesr rr )rI �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' rg r^ ) rI r� �verZshp�typZisf�rawZmskZflvrT 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� rb r� )rI r r r! � __reduce__� s zMaskedRecords.__reduce__)NN)N)�__name__� __module__� __qualname__�__doc__r rU rk rl �propertyr rn r rp rd r� r� r� r� r� rf r� r� rR r� r� r� r� r r r r! r n s4 % -8 ) c C s4 t �|||��| �}t �t |d�}| j| |||d�S )zK Build a new MaskedArray from the information stored in a pickle. Zb1)r] r )r rU rf )�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" 0 s z fromarrays.<locals>.<listcomp>c S s g | ]}t �t|���qS r )r( Z atleast_1dr )r r� r r r! r" 1 s )r rG r1 r@ rO rQ rP N)� recfromarraysrf r r9 r= r rH r^ ) Z arraylistr rG r1 r@ rO rQ rP r^ �datalistZmasklistZ_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 rG r1 r@ rO rQ rP F)rR rq c S s g | ] }t |��qS r )r8 )r rS r r r! r" u s z fromrecords.<locals>.<listcomp>)rc r7 r r r rf r r� �recfromrecordsr r^ r r( r r5 r rH ro rZ ) Zreclistr rG r1 r@ rO rQ rP r^ r] 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. rq r z The array should be 2D at most!) r( r) ro r~ �intrv �float�complexr? r )Zarr�vartypesr� r r r! �_guessvartypes} s* r� c C st t | d�r| S y t| �}W n tk r: td| ��Y nX |�� dd� dkr`|�dd� |S |�� td��dS )z1 Opens the file handle of file `fname`. �readlinezNo such file: '%s'Nrq z\xr zWow, binary file)r% �open�IOErrorr� �seek�closery )�fnamer� r r r! �openfile� s r� �#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 )r5 �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.rq )� stacklevelc S s g | ]\}}||f�qS r r )r rB r� r r r! r" � s c S s g | ]}t �|��qS r )rV Zdefault_fill_value)r r� r r r! r" � s c S s$ g | ] \}}}}t ||||d ��qS ))r] r r^ )r )r �arS rD r� r r r! r" � s )r )r� r� �findr� r; r5 r rG r� r� �warnings�warnr= �Tr )r� r� r� Z missingchar�varnamesr� Zftextr� � firstlineZ _varnamesZ _variablesr� Znfieldsra rJ 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 )r� rx )r r� )r �newdatar r! r" s z addfield.<locals>.<listcomp>c S s g | ] }|t f�qS r )r )r rB r r r! r" s c s" g | ]}�j � j|� f|�� �qS r )r� rx )r r� )r �newmaskr r! r" s )r r r> r5 r rV r r( r' r rG ru �valuesr� rf r r@ r )ZmrecordZnewfieldZ newfieldnameZnewdtypeZ newmdtyper )r r r� r� r! r � s& )N)NNNNNFNN)Nr� r# NN)N)5r� � __future__r r r r� r� �numpyr( Znumpy.core.numerictypes�coreZ numerictypesr- � numpy.compatr r r r r r re Znumpy.core.recordsr r� r r� �recordsZ_byteorderconvr* Znumpy.marV r r r r r r r r Z_check_fill_value�__all__r> r3 rE rK rs r r� r r� r� r r r r r r! �<module> sH ( " )?% C