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It decodes the bytes according to PEP-0263 for determining source file encoding. It accepts a readline-like method which is called repeatedly to get the next line of input (or b"" for EOF). It generates 5-tuples with these members: the token type (see token.py) the token (a string) the starting (row, column) indices of the token (a 2-tuple of ints) the ending (row, column) indices of the token (a 2-tuple of ints) the original line (string) It is designed to match the working of the Python tokenizer exactly, except that it produces COMMENT tokens for comments and gives type OP for all operators. Additionally, all token lists start with an ENCODING token which tells you which encoding was used to decode the bytes stream. u Ka-Ping Yee <ping@lfw.org>up GvR, ESR, Tim Peters, Thomas Wouters, Fred Drake, Skip Montanaro, Raymond Hettinger, Trent Nelson, Michael Foordi N( u lookupu BOM_UTF8( u TextIOWrapper( u chain( u *u% ^[ \t\f]*#.*coding[:=][ \t]*([-\w.]+)s ^[ \t\f]*(?:[#\r\n]|$)u COMMENTu tokenizeu detect_encodingu NLu untokenizeu ENCODINGu TokenInfoi i i u (u )u [u ]u :u ,u ;u +u -u *u /u |u &u <u >u =u .u %u {u }u ==u !=u <=u >=u ~u ^u <<u >>u **u +=u -=u *=u /=u %=u &=u |=u ^=u <<=u >>=u **=u //u //=u @c B s2 | Ee Z d Z d d � Z e d d � � Z d S( u TokenInfoc C s. d | j t | j f } d | j d | � S( Nu %d (%s)u8 TokenInfo(type=%s, string=%r, start=%r, end=%r, line=%r)u type( u typeu tok_nameu _replace( u selfu annotated_type( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu __repr__b s u TokenInfo.__repr__c C s4 | j t k r) | j t k r) t | j S| j Sd S( N( u typeu OPu stringu EXACT_TOKEN_TYPES( u self( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu exact_typeg s u TokenInfo.exact_typeN( u __name__u __module__u __qualname__u __repr__u propertyu exact_type( u __locals__( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu TokenInfoa s u type string start end linec G s d d j | � d S( Nu (u |u )( u join( u choices( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu groupn s u groupc G s t | � d S( Nu *( u group( u choices( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu anyo s u anyc G s t | � d S( Nu ?( u group( u choices( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu maybep s u maybeu [ \f\t]*u #[^\r\n]*u \\\r?\nu \w+u 0[xX][0-9a-fA-F]+u 0[bB][01]+u 0[oO][0-7]+u (?:0+|[1-9][0-9]*)u [eE][-+]?[0-9]+u [0-9]+\.[0-9]*u \.[0-9]+u [0-9]+u [0-9]+[jJ]u [jJ]u (?:[bB][rR]?|[rR][bB]?|[uU])?u [^'\\]*(?:\\.[^'\\]*)*'u [^"\\]*(?:\\.[^"\\]*)*"u% [^'\\]*(?:(?:\\.|'(?!''))[^'\\]*)*'''u% [^"\\]*(?:(?:\\.|"(?!""))[^"\\]*)*"""u '''u """u '[^\n'\\]*(?:\\.[^\n'\\]*)*'u "[^\n"\\]*(?:\\.[^\n"\\]*)*"u \*\*=?u >>=?u <<=?u //=?u ->u [+\-*/%&|^=<>]=?u [][(){}]u \r?\nu \.\.\.u [:;.,@]u '[^\n'\\]*(?:\\.[^\n'\\]*)*u 'u "[^\n"\\]*(?:\\.[^\n"\\]*)*u "u \\\r?\n|\Zc C s t j | t j � S( N( u reu compileu UNICODE( u expr( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu _compile� s u _compileu r'''u r"""u b'''u b"""u R'''u R"""u B'''u B"""u br'''u br"""u bR'''u bR"""u Br'''u Br"""u BR'''u BR"""u rb'''u rb"""u Rb'''u Rb"""u rB'''u rB"""u RB'''u RB"""u u'''u u"""u U'''u U"""u ru Ru bu Bu uu Uu r'u r"u R'u R"u b'u b"u B'u B"u br'u br"u Br'u Br"u bR'u bR"u BR'u BR"u rb'u rb"u rB'u rB"u Rb'u Rb"u RB'u RB"u u'u u"u U'u U"i c B s | Ee Z d Z d S( u TokenErrorN( u __name__u __module__u __qualname__( u __locals__( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu TokenError� s u TokenErrorc B s | Ee Z d Z d S( u StopTokenizingN( u __name__u __module__u __qualname__( u __locals__( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu StopTokenizing� s u StopTokenizingc B sD | Ee Z d Z d d � Z d d � Z d d � Z d d � Z d S( u Untokenizerc C s( g | _ d | _ d | _ d | _ d S( Ni i ( u tokensu prev_rowu prev_colu Noneu encoding( u self( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu __init__� s u Untokenizer.__init__c C s� | \ } } | | j k s9 | | j k r` | | j k r` t d j | | | j | j � � � n | | j } | r� | j j d | � d | _ n | | j } | r� | j j d | � n d S( Nu+ start ({},{}) precedes previous end ({},{})u \ i u ( u prev_rowu prev_colu ValueErroru formatu tokensu append( u selfu startu rowu colu row_offsetu col_offset( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu add_whitespace� s - u Untokenizer.add_whitespacec C s� t | � } x� | D]� } t | � d k r? | j | | � Pn | \ } } } } } | t k ro | | _ q n | t k r Pn | j | � | j j | � | \ | _ | _ | t t f k r | j d 7_ d | _ q q Wd j | j � S( Ni i i u ( u iteru lenu compatu ENCODINGu encodingu ENDMARKERu add_whitespaceu tokensu appendu prev_rowu prev_colu NEWLINEu NLu join( u selfu iterableu itu tu tok_typeu tokenu startu endu line( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu untokenize� s$ u Untokenizer.untokenizec C sP g } | j j } | d t t f k } d } xt | g | � D]} | d d � \ } } | t k rx | | _ qA n | t t f k r� | d 7} n | t k r� | r� d | } n d } n d } | t k r� | j | � qA nZ | t k r | j � qA n> | t t f k rd } n# | r>| r>| | d � d } n | | � qA Wd S( Ni i u i FTi����( u tokensu appendu NEWLINEu NLu Falseu chainu ENCODINGu encodingu NAMEu NUMBERu STRINGu Trueu INDENTu DEDENTu pop( u selfu tokenu iterableu indentsu toks_appendu startlineu prevstringu toku toknumu tokval( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu compat s8 u Untokenizer.compatN( u __name__u __module__u __qualname__u __init__u add_whitespaceu untokenizeu compat( u __locals__( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu Untokenizer� s u Untokenizerc C s@ t � } | j | � } | j d k r< | j | j � } n | S( u Transform tokens back into Python source code. It returns a bytes object, encoded using the ENCODING token, which is the first token sequence output by tokenize. Each element returned by the iterable must be a token sequence with at least two elements, a token number and token value. If only two tokens are passed, the resulting output is poor. Round-trip invariant for full input: Untokenized source will match input source exactly Round-trip invariant for limited intput: # Output bytes will tokenize the back to the input t1 = [tok[:2] for tok in tokenize(f.readline)] newcode = untokenize(t1) readline = BytesIO(newcode).readline t2 = [tok[:2] for tok in tokenize(readline)] assert t1 == t2 N( u Untokenizeru untokenizeu encodingu Noneu encode( u iterableu utu out( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu untokenize. s c C sd | d d � j � j d d � } | d k s= | j d � rA d S| d k s\ | j d � r` d S| S( u( Imitates get_normal_name in tokenizer.c.Ni u _u -u utf-8u utf-8-u latin-1u iso-8859-1u iso-latin-1u latin-1-u iso-8859-1-u iso-latin-1-( u latin-1u iso-8859-1u iso-latin-1( u latin-1-u iso-8859-1-u iso-latin-1-( u loweru replaceu startswith( u orig_encu enc( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu _get_normal_nameI s " u _get_normal_namec s4 y � j j � Wn t k r* d � Yn Xd � d } d } � f d d � } � � f d d � } | � } | j t � r� d � | d d � } d } n | s� | g f S| | � } | r� | | g f St j | � s� | | g f S| � } | s| | g f S| | � } | r$| | | g f S| | | g f S( u The detect_encoding() function is used to detect the encoding that should be used to decode a Python source file. It requires one argument, readline, in the same way as the tokenize() generator. It will call readline a maximum of twice, and return the encoding used (as a string) and a list of any lines (left as bytes) it has read in. It detects the encoding from the presence of a utf-8 bom or an encoding cookie as specified in pep-0263. If both a bom and a cookie are present, but disagree, a SyntaxError will be raised. If the encoding cookie is an invalid charset, raise a SyntaxError. Note that if a utf-8 bom is found, 'utf-8-sig' is returned. If no encoding is specified, then the default of 'utf-8' will be returned. u utf-8c s( y � � SWn t k r# d SYn Xd S( Ns ( u StopIteration( ( u readline( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu read_or_stopl s u% detect_encoding.<locals>.read_or_stopc s; y | j d � } WnE t k rZ d } � d k rJ d j | � � } n t | � � Yn Xt j | � } | st d St | j d � � } y t | � } WnI t k r� � d k r� d | } n d j � | � } t | � � Yn X� r7| d k r*� d k r d } n d j � � } t | � � n | d 7} n | S( Nu utf-8u' invalid or missing encoding declarationu {} for {!r}i u unknown encoding: u unknown encoding for {!r}: {}u encoding problem: utf-8u encoding problem for {!r}: utf-8u -sig( u decodeu UnicodeDecodeErroru Noneu formatu SyntaxErroru cookie_reu matchu _get_normal_nameu groupu lookupu LookupError( u lineu line_stringu msgu matchu encodingu codec( u bom_foundu filename( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu find_cookier s6 u$ detect_encoding.<locals>.find_cookiei Nu utf-8-sigFT( u __self__u nameu AttributeErroru Noneu Falseu startswithu BOM_UTF8u Trueu blank_reu match( u readlineu encodingu defaultu read_or_stopu find_cookieu firstu second( ( u bom_foundu filenameu readlineu- /opt/alt/python33/lib64/python3.3/tokenize.pyu detect_encodingT s8 & c C sV t j | d � } t | j � \ } } | j d � t | | d d �} d | _ | S( uX Open a file in read only mode using the encoding detected by detect_encoding(). u rbi u line_bufferingu rT( u builtinsu openu detect_encodingu readlineu seeku TextIOWrapperu Trueu mode( u filenameu bufferu encodingu linesu text( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu open� s u openc C s_ d d l m } m } t | � \ } } t | d � } | d � } t | | | | � j | � S( u� The tokenize() generator requires one argment, readline, which must be a callable object which provides the same interface as the readline() method of built-in file objects. Each call to the function should return one line of input as bytes. Alternately, readline can be a callable function terminating with StopIteration: readline = open(myfile, 'rb').__next__ # Example of alternate readline The generator produces 5-tuples with these members: the token type; the token string; a 2-tuple (srow, scol) of ints specifying the row and column where the token begins in the source; a 2-tuple (erow, ecol) of ints specifying the row and column where the token ends in the source; and the line on which the token was found. The line passed is the logical line; continuation lines are included. The first token sequence will always be an ENCODING token which tells you which encoding was used to decode the bytes stream. i ( u chainu repeats ( u itertoolsu chainu repeatu detect_encodingu iteru _tokenizeu __next__( u readlineu chainu repeatu encodingu consumedu rl_genu empty( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu tokenize� s c c s d } } } d } d \ } } d } d g } | d k rj | d k rP d } n t t | d d d � Vn xMy | � } Wn t k r� d } Yn X| d k r� | j | � } n | d 7} d t | � } } | r�| s� t d | � � n | j | � } | rZ| j d � } } t t | | d | � | | | f | | � Vd \ } } d } ql| r�| d d � d k r�| d! d � d k r�t t | | | | t | � f | � Vd } d } qm ql| | } | | } qm n�| d k rH| rH| s�Pn d } xv | | k rz| | d k r.| d 7} n? | | d k rS| t d t } n | | d k rld } n P| d 7} qW| | k r�Pn | | d k r�| | d k r7| | d � j d � } | t | � } t t | | | f | | t | � f | � Vt t | | d � | | f | t | � f | � Vqm t t t f | | d k | | d � | | f | t | � f | � Vqm n | | d" k r�| j | � t t | d | � | d f | | f | � Vn x� | | d# k rD| | k rt d d | | | f � � n | d d$ � } t t d | | f | | f | � Vq�Wn$ | sft d | d f � � n d } xH| | k r�t t � j | | � } | r~| j d � \ } } | | f | | f | } } } | | k r�qon | | | � | | } } | | k s+| d k rE| d k rE| d k rEt t | | | | � Vq�| d k r}t | d k rft n t | | | | � Vq�| d k r�t t | | | | � Vq�| t k r<t t | � } | j | | � } | r| j d � } | | | � } t t | | | | f | � Vq{| | f } | | d � } | } Pq�| t k st| d d � t k st| d d � t k r�| d% d k r�| | f } t t | p�t | d p�t | d � } | | d � d } } | } Pq{t t | | | | � Vq�| j � r t t | | | | � Vq�| d k r2d } q�| d k rK| d 7} n | d k rd| d 8} n t t | | | | � Vqot t | | | | f | | d f | � V| d 7} qoWqm x; | d d � D]) } t t d | d f | d f d � Vq�Wt t d | d f | d f d � Vd S(& Ni u 0123456789u u utf-8-sigu utf-8s i u EOF in multi-line stringi u \ i u \ u u u u # u #u u3 unindent does not match any outer indentation levelu <tokenize>u EOF in multi-line statementu .u ...u u \u ([{u )]}( u i ( i i ( i i ( u i i����i����i����i����i����i����( u Noneu TokenInfou ENCODINGu StopIterationu decodeu lenu TokenErroru matchu endu STRINGu ERRORTOKENu tabsizeu rstripu COMMENTu NLu appendu INDENTu IndentationErroru DEDENTu _compileu PseudoTokenu spanu NUMBERu NEWLINEu triple_quotedu endpatsu single_quotedu isidentifieru NAMEu OPu ENDMARKER( u readlineu encodingu lnumu parenlevu continuedu numcharsu contstru needcontu contlineu indentsu lineu posu maxu strstartu endprogu endmatchu endu columnu comment_tokenu nl_posu pseudomatchu startu sposu eposu tokenu initialu indent( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu _tokenize� s 2 $#' 0 * $ 'u _tokenizec C s t | d � S( N( u _tokenizeu None( u readline( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu generate_tokenss s u generate_tokensc s� d d l } d d � � d d � f d d � } | j d d � } | j d d d d d d d d � | j d d d d d d d d �| j � } y� | j r� | j } t j | d � � } t t | j � � } Wd QXn d } t t j j d � } x^ | D]V } | j } | j r | j } n d | j | j } t d | t | | j f � q� WWnbt k r�} z? | j d d d � \ } } | | j d | | | f � WYd d } ~ Xnt k r } z5 | j d \ } } | | j d | | | f � WYd d } ~ Xn� t k r=} z | | | � WYd d } ~ Xn t k rk} z | | � WYd d } ~ XnQ t k r�t d � Yn6 t k r�} z � d | � � WYd d } ~ Xn Xd S( Ni c S s t | d t j �d S( Nu file( u printu sysu stderr( u message( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu perrorz s u main.<locals>.perrorc sg | r+ | f | | f } � d | � n+ | rH � d | | f � n � d | � t j d � d S( Nu %s:%d:%d: error: %su %s: error: %su error: %si ( u sysu exit( u messageu filenameu locationu args( u perror( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu error} s u main.<locals>.erroru progu python -m tokenizeu destu filenameu nargsu ?u metavaru filename.pyu helpu' the file to tokenize; defaults to stdinu -eu --exactu exactu actionu store_trueu( display token names using the exact typeu rbu <stdin>u %d,%d-%d,%d:u %-20s%-15s%-15ri i u interrupted u unexpected error: %s( u argparseu Noneu ArgumentParseru add_argumentu parse_argsu filenameu builtinsu openu listu tokenizeu readlineu _tokenizeu sysu stdinu typeu exactu exact_typeu startu endu printu tok_nameu stringu IndentationErroru argsu TokenErroru SyntaxErroru IOErroru KeyboardInterruptu Exception( u argparseu erroru parseru argsu filenameu fu tokensu tokenu token_typeu token_rangeu erru lineu column( ( u perroru- /opt/alt/python33/lib64/python3.3/tokenize.pyu mainv sN // u mainu __main__( u '''u """u r'''u r"""u R'''u R"""u b'''u b"""u B'''u B"""u br'''u br"""u Br'''u Br"""u bR'''u bR"""u BR'''u BR"""u rb'''u rb"""u rB'''u rB"""u Rb'''u Rb"""u RB'''u RB"""u u'''u u"""u U'''u U"""( u 'u "u r'u r"u R'u R"u b'u b"u B'u B"u br'u br"u Br'u Br"u bR'u bR"u BR'u BR"u rb'u rb"u rB'u rB"u Rb'u Rb"u RB'u RB"u u'u u"u U'u U"(} u __doc__u __author__u __credits__u builtinsu codecsu lookupu BOM_UTF8u collectionsu iou TextIOWrapperu itertoolsu chainu reu sysu tokenu compileu ASCIIu cookie_reu blank_reu __all__u N_TOKENSu COMMENTu tok_nameu NLu ENCODINGu LPARu RPARu LSQBu RSQBu COLONu COMMAu SEMIu PLUSu MINUSu STARu SLASHu VBARu AMPERu LESSu GREATERu EQUALu DOTu PERCENTu LBRACEu RBRACEu EQEQUALu NOTEQUALu LESSEQUALu GREATEREQUALu TILDEu CIRCUMFLEXu LEFTSHIFTu RIGHTSHIFTu DOUBLESTARu PLUSEQUALu MINEQUALu STAREQUALu SLASHEQUALu PERCENTEQUALu AMPEREQUALu VBAREQUALu CIRCUMFLEXEQUALu LEFTSHIFTEQUALu RIGHTSHIFTEQUALu DOUBLESTAREQUALu DOUBLESLASHu DOUBLESLASHEQUALu ATu EXACT_TOKEN_TYPESu namedtupleu TokenInfou groupu anyu maybeu Whitespaceu Commentu Ignoreu Nameu Hexnumberu Binnumberu Octnumberu Decnumberu Intnumberu Exponentu Pointfloatu Expfloatu Floatnumberu Imagnumberu Numberu StringPrefixu Singleu Doubleu Single3u Double3u Tripleu Stringu Operatoru Bracketu Specialu Funnyu PlainTokenu Tokenu ContStru PseudoExtrasu PseudoTokenu _compileu Noneu endpatsu triple_quotedu tu single_quotedu tabsizeu Exceptionu TokenErroru StopTokenizingu Untokenizeru untokenizeu _get_normal_nameu detect_encodingu openu tokenizeu _tokenizeu generate_tokensu mainu __name__( ( ( u- /opt/alt/python33/lib64/python3.3/tokenize.pyu <module> sF " N ] � <