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� z fc @ s� d Z d d l Z d d l m Z d d l m Z m Z m Z m Z m Z m Z m Z m Z m Z m Z m Z m Z m Z m Z d d l m Z y d d l m Z Wn! e k r� d d l m Z n Xd d d d d d d d d d d d d d d d d d d d g Z d d" d � � YZ d e f d � � YZ e d e � d e f d � � YZ e d e � d d# d � � YZ d d$ d � � YZ y e Wn e k r�e Z n Xd d% d! � � YZ d S(& s+ csv.py - read/write/investigate CSV files i����N( t reduce( t Errort __version__t writert readert register_dialectt unregister_dialectt get_dialectt list_dialectst field_size_limitt QUOTE_MINIMALt QUOTE_ALLt QUOTE_NONNUMERICt QUOTE_NONEt __doc__( t Dialect( t StringIOR R R R R R R t excelt excel_tabR R R R R R t SnifferR R t DictReadert DictWriterc B sV e Z d Z d Z e Z d Z d Z d Z d Z d Z d Z d Z d � Z d � Z RS( s� Describe an Excel dialect. This must be subclassed (see csv.excel). Valid attributes are: delimiter, quotechar, escapechar, doublequote, skipinitialspace, lineterminator, quoting. t c C s) | j t k r t | _ n | j � d S( N( t __class__R t Truet _validt _validate( t self( ( s /usr/lib64/python2.7/csv.pyt __init__- s c C s: y t | � Wn% t k r5 } t t | � � � n Xd S( N( t _Dialectt TypeErrorR t str( R t e( ( s /usr/lib64/python2.7/csv.pyR 2 s N( t __name__t __module__R t _namet FalseR t Nonet delimitert quotechart escapechart doublequotet skipinitialspacet lineterminatort quotingR R ( ( ( s /usr/lib64/python2.7/csv.pyR s c B s2 e Z d Z d Z d Z e Z e Z d Z e Z RS( s; Describe the usual properties of Excel-generated CSV files.t ,t "s ( R! R" R R& R' R R) R$ R* R+ R R, ( ( ( s /usr/lib64/python2.7/csv.pyR 9 s c B s e Z d Z d Z RS( sE Describe the usual properties of Excel-generated TAB-delimited files.s ( R! R" R R& ( ( ( s /usr/lib64/python2.7/csv.pyR C s s excel-tabc B sP e Z d d d d d � Z d � Z e d � � Z e j d � � Z d � Z RS( R c O sI | | _ | | _ | | _ t | | | | � | _ | | _ d | _ d S( Ni ( t _fieldnamest restkeyt restvalR t dialectt line_num( R t ft fieldnamesR0 R1 R2 t argst kwds( ( s /usr/lib64/python2.7/csv.pyR J s c C s | S( N( ( R ( ( s /usr/lib64/python2.7/csv.pyt __iter__S s c C sR | j d k r< y | j j � | _ Wq< t k r8 q< Xn | j j | _ | j S( N( R/ R% R t nextt StopIterationR3 ( R ( ( s /usr/lib64/python2.7/csv.pyR5 V s c C s | | _ d S( N( R/ ( R t value( ( s /usr/lib64/python2.7/csv.pyR5 d s c C s� | j d k r | j n | j j � } | j j | _ x | g k rX | j j � } q: Wt t | j | � � } t | j � } t | � } | | k r� | | | | j <n4 | | k r� x% | j | D] } | j | | <q� Wn | S( Ni ( R3 R5 R R9 t dictt zipt lenR0 R1 ( R t rowt dt lft lrt key( ( s /usr/lib64/python2.7/csv.pyR9 h s N( R! R" R% R R8 t propertyR5 t setterR9 ( ( ( s /usr/lib64/python2.7/csv.pyR I s c B s> e Z d d d d � Z d � Z d � Z d � Z d � Z RS( R t raiseR c O sY | | _ | | _ | j � d k r4 t d | � n | | _ t | | | | � | _ d S( NRF t ignores- extrasaction (%s) must be 'raise' or 'ignore'( RF RG ( R5 R1 t lowert ValueErrort extrasactionR ( R R4 R5 R1 RJ R2 R6 R7 ( ( s /usr/lib64/python2.7/csv.pyR � s c C s, t t | j | j � � } | j | � d S( N( R< R= R5 t writerow( R t header( ( s /usr/lib64/python2.7/csv.pyt writeheader� s c C s� | j d k ru g | D] } | | j k r | ^ q } | ru t d d j g | D] } t | � ^ qP � � � qu n g | j D] } | j | | j � ^ q S( NRF s( dict contains fields not in fieldnames: s , ( RJ R5 RI t joint reprt getR1 ( R t rowdictt kt wrong_fieldst xRC ( ( s /usr/lib64/python2.7/csv.pyt _dict_to_list� s (2c C s | j j | j | � � S( N( R RK RU ( R RQ ( ( s /usr/lib64/python2.7/csv.pyRK � s c C s= g } x$ | D] } | j | j | � � q W| j j | � S( N( t appendRU R t writerows( R t rowdictst rowsRQ ( ( s /usr/lib64/python2.7/csv.pyRW � s ( R! R" R RM RU RK RW ( ( ( s /usr/lib64/python2.7/csv.pyR s c B s> e Z d Z d � Z d d � Z d � Z d � Z d � Z RS( se "Sniffs" the format of a CSV file (i.e. delimiter, quotechar) Returns a Dialect object. c C s d d d d d g | _ d S( NR- s t ;t t :( t preferred( R ( ( s /usr/lib64/python2.7/csv.pyR � s c C s� | j | | � \ } } } } | s? | j | | � \ } } n | sQ t d � n d t f d � � Y} | | _ | | _ | p� d | _ | | _ | S( sI Returns a dialect (or None) corresponding to the sample s Could not determine delimiterR2 c B s e Z d Z d Z e Z RS( t sniffeds ( R! R" R# R+ R R, ( ( ( s /usr/lib64/python2.7/csv.pyR2 � s R. ( t _guess_quote_and_delimitert _guess_delimiterR R R) R& R' R* ( R t samplet delimitersR' R) R& R* R2 ( ( s /usr/lib64/python2.7/csv.pyt sniff� s c C sE g } xC d D]; } t j | t j t j B� } | j | � } | r Pq q W| sb d t d d f Si } i } d } x | D]� } | j d d } | | } | r� | j | d � d | | <n y | j d d } | | } Wn t k r� q{ n X| r0| d k s| | k r0| j | d � d | | <n y | j d d } Wn t k r[q{ n X| | r{ | d 7} q{ q{ Wt | d � | j � � } | r�t | d � | j � � } | | | k } | d k r�d } q�n d } d } t j d i t j | � d 6| d 6t j � } | j | � r/t } n t } | | | | f S( s� Looks for text enclosed between two identical quotes (the probable quotechar) which are preceded and followed by the same character (the probable delimiter). For example: ,'some text', The quote with the most wins, same with the delimiter. If there is no quotechar the delimiter can't be determined this way. sF (?P<delim>[^\w "'])(?P<space> ?)(?P<quote>["']).*?(?P=quote)(?P=delim)sC (?:^| )(?P<quote>["']).*?(?P=quote)(?P<delim>[^\w "'])(?P<space> ?)sC (?P<delim>[^\w "'])(?P<space> ?)(?P<quote>["']).*?(?P=quote)(?:$| )s* (?:^| )(?P<quote>["']).*?(?P=quote)(?:$| )R i t quotei t delimt spacec S s | | | | k r | p | S( N( ( t at bt quotes( ( s /usr/lib64/python2.7/csv.pyt <lambda>� s c S s | | | | k r | p | S( N( ( Rg Rh t delims( ( s /usr/lib64/python2.7/csv.pyRj s s s] ((%(delim)s)|^)\W*%(quote)s[^%(delim)s\n]*%(quote)s[^%(delim)s\n]*%(quote)s\W*((%(delim)s)|$)( sF (?P<delim>[^\w "'])(?P<space> ?)(?P<quote>["']).*?(?P=quote)(?P=delim)sC (?:^| )(?P<quote>["']).*?(?P=quote)(?P<delim>[^\w "'])(?P<space> ?)sC (?P<delim>[^\w "'])(?P<space> ?)(?P<quote>["']).*?(?P=quote)(?:$| )s* (?:^| )(?P<quote>["']).*?(?P=quote)(?:$| )N( t ret compilet DOTALLt MULTILINEt findallR$ R% t groupindexRP t KeyErrorR t keyst escapet searchR ( R t dataRb t matchest restrt regexpRi Rk t spacest mt nRC R' Re R* t dq_regexpR) ( ( s /usr/lib64/python2.7/csv.pyR_ � sb ' c C s t d | j d � � } g t d � D] } t | � ^ q% } t d t | � � } d } i } i } i } d t | t | � � } } x�| t | � k r| d 7} xk | | | !D]\ } xS | D]K } | j | i � } | j | � } | j | d � d | | <| | | <q� Wq� Wx� | j � D]� } | | j � } t | � d k rb| d d d k rbq n t | � d k r�t d � | � | | <| j | | � | | d | | d t d � | � d f | | <q | d | | <q W| j � } t | | � } d } d } x� t | � d k r�| | k r�xp | D]h \ } } | d d k r4| d d k r4| d | | k r�| d k s�| | k r�| | | <q�q4q4W| d 8} qWt | � d k r| j � d } | d j | � | d j d | � k } | | f S| } | | 7} q� W| s"d St | � d k r�xZ | j D]L } | | j � k r>| d j | � | d j d | � k } | | f Sq>Wn g | j � D] \ } } | | f ^ q�} | j � | d d } | d j | � | d j d | � k } | | f S( s� The delimiter /should/ occur the same number of times on each row. However, due to malformed data, it may not. We don't want an all or nothing approach, so we allow for small variations in this number. 1) build a table of the frequency of each character on every line. 2) build a table of frequencies of this frequency (meta-frequency?), e.g. 'x occurred 5 times in 10 rows, 6 times in 1000 rows, 7 times in 2 rows' 3) use the mode of the meta-frequency to determine the /expected/ frequency for that character 4) find out how often the character actually meets that goal 5) the character that best meets its goal is the delimiter For performance reasons, the data is evaluated in chunks, so it can try and evaluate the smallest portion of the data possible, evaluating additional chunks as necessary. s i i i i c S s | d | d k r | p | S( Ni ( ( Rg Rh ( ( s /usr/lib64/python2.7/csv.pyRj I R c S s d | d | d f S( Ni i ( ( Rg Rh ( ( s /usr/lib64/python2.7/csv.pyRj O R g �?g�������?g{�G�z�?s %c R i����N( R i ( t filterR% t splitt ranget chrt minR> RP t countRs t itemsR t removet floatR] t sort( R Rv Rb t ct asciit chunkLengtht iterationt charFrequencyt modesRk t startt endt linet chart metaFrequencyt freqR� t modeListt totalt consistencyt thresholdRR t vRe R* R@ ( ( s /usr/lib64/python2.7/csv.pyR` sx % & ! + c C s t t | � | j | � � } | j � } t | � } i } x t | � D] } d | | <qI Wd } x� | D]� } | d k r� Pn | d 7} t | � | k r� qj n x� | j � D]� } xW t t t t g D]3 } y | | | � PWq� t t f k r� q� Xq� Wt | | � } | t k r$t } n | | | k r� | | d k rQ| | | <q[| | =q� q� Wqj Wd } x� | j � D]� \ } } t | � t d � k r�t | | � | k r�| d 7} q | d 8} qvy | | | � Wn! t t f k r�| d 7} qvX| d 8} qvW| d k S( Ni i i ( R R Rc R9 R> R� R% Rs t intt longR� t complexRI t OverflowErrorR� t typeR ( R Ra t rdrRL t columnst columnTypest it checkedR? t colt thisTypet hasHeadert colType( ( s /usr/lib64/python2.7/csv.pyt has_header� sN N( R! R" R R R% Rc R_ R` R� ( ( ( s /usr/lib64/python2.7/csv.pyR � s M i( ( ( ( ( R Rl t functoolsR t _csvR R R R R R R R R R R R R R R t cStringIOR t ImportErrort __all__R R R R R� t NameErrorR� R ( ( ( s /usr/lib64/python2.7/csv.pyt <module> s2 ^ 6"
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