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� �V~gc @ s d Z d d l m Z d d l m Z d d l m Z m Z d d l m Z d d l m Z d � Z d � Z d � Z d � Z d5 d � Z d � Z d � Z d � Z e � e � d � Z d5 d5 d � Z d � Z d � Z d5 d � Z d � Z d5 d � Z d5 d � Z d � Z d � Z d � Z d � Z! e" d d d d d d! d" d# d$ d% g � Z# d& � Z$ d' a% d( a& d) a' e( a) d* � Z* d+ � Z+ d, � Z, d- � Z- d. � Z. d/ � Z/ d0 � Z0 d1 � Z1 e" e j2 e j3 g � Z4 d5 d2 � Z5 e" e j3 e j2 e j6 g � Z7 d3 � Z8 d5 d4 � Z9 d5 S(6 s1 Utility functions, node construction macros, etc.i����( t islicei ( t token( t Leaft Node( t python_symbols( t patcompc C s% t t j | t t j d � | g � S( Nu =( R t symst argumentR R t EQUAL( t keywordt value( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt KeywordArg s c C s t t j d � S( Nu (( R R t LPAR( ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt LParen s c C s t t j d � S( Nu )( R R t RPAR( ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt RParen s c C sl t | t � s | g } n t | t � s? d | _ | g } n t t j | t t j d d d �g | � S( s Build an assignment statementu u =t prefix( t isinstancet listR R R t atomR R R ( t targett source( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt Assign s c C s t t j | d | �S( s Return a NAME leafR ( R R t NAME( t nameR ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt Name& s c C s | t t j t � | g � g S( s A node tuple for obj.attr( R R t trailert Dot( t objt attr( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt Attr* s c C s t t j d � S( s A comma leafu ,( R R t COMMA( ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt Comma. s c C s t t j d � S( s A period (.) leafu .( R R t DOT( ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyR 2 s c C sM t t j | j � | j � g � } | rI | j d t t j | � � n | S( s- A parenthesised argument list, used by Call()i ( R R R t clonet insert_childt arglist( t argst lparent rparent node( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt ArgList6 s $ c C s: t t j | t | � g � } | d k r6 | | _ n | S( s A function callN( R R t powerR) t NoneR ( t func_nameR% R R( ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt Call= s c C s t t j d � S( s A newline literalu ( R R t NEWLINE( ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt NewlineD s c C s t t j d � S( s A blank lineu ( R R R. ( ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt BlankLineH s c C s t t j | d | �S( NR ( R R t NUMBER( t nR ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt NumberL s c C s1 t t j t t j d � | t t j d � g � S( s A numeric or string subscriptu [u ]( R R R R R t LBRACEt RBRACE( t index_node( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt SubscriptO s c C s t t j | d | �S( s A string leafR ( R R t STRING( t stringR ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt StringU s c C s d | _ d | _ d | _ t t j d � } d | _ t t j d � } d | _ | | | | g } | r� d | _ t t j d � } d | _ | j t t j | | g � � n t t j | t t j | � g � } t t j t t j d � | t t j d � g � S( su A list comprehension of the form [xp for fp in it if test]. If test is None, the "if test" part is omitted. u u u foru inu ifu [u ]( R R R R t appendR R t comp_ift listmakert comp_forR R4 R5 ( t xpt fpt itt testt for_leaft in_leaft inner_argst if_leaft inner( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt ListCompY s$ "$ c C s x | D] } | j � q Wt t j d � t t j | d d �t t j d d d �t t j | � g } t t j | � } | S( sO Return an import statement in the form: from package import name_leafsu fromR u u import( t removeR R R R R t import_as_namest import_from( t package_namet name_leafst leaft childrent imp( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt FromImportq s c C s� t | t � r. | j t � t � g k r. t St | t � o� t | j � d k o� t | j d t � o� t | j d t � o� t | j d t � o� | j d j d k o� | j d j d k S( s( Does the node represent a tuple literal?i i i i u (u )( R R RO R R t Truet lenR R ( R( ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt is_tuple� s *c C sz t | t � oy t | j � d k oy t | j d t � oy t | j d t � oy | j d j d k oy | j d j d k S( s' Does the node represent a list literal?i i i����u [u ]( R R RS RO R R ( R( ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt is_list� s c C s t t j t � | t � g � S( N( R R R R R ( R( ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt parenthesize� s t sortedR t sett anyt allt tuplet sumt mint maxt enumeratec c s4 t | | � } x | r/ | Vt | | � } q Wd S( sl Follow an attribute chain. If you have a chain of objects where a.foo -> b, b.foo-> c, etc, use this to iterate over all objects in the chain. Iteration is terminated by getattr(x, attr) is None. Args: obj: the starting object attr: the name of the chaining attribute Yields: Each successive object in the chain. N( t getattr( R R t next( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt attr_chain� s se for_stmt< 'for' any 'in' node=any ':' any* > | comp_for< 'for' any 'in' node=any any* > s� power< ( 'iter' | 'list' | 'tuple' | 'sorted' | 'set' | 'sum' | 'any' | 'all' | 'enumerate' | (any* trailer< '.' 'join' >) ) trailer< '(' node=any ')' > any* > s` power< ( 'sorted' | 'enumerate' ) trailer< '(' arglist<node=any any*> ')' > any* > c C s� t s< t j t � a t j t � a t j t � a t a n t t t g } xR t | t | d � � D]8 \ } } i } | j | | � rd | d | k rd t Sqd Wt S( s Returns true if node is in an environment where all that is required of it is being iterable (ie, it doesn't matter if it returns a list or an iterator). See test_map_nochange in test_fixers.py for some examples and tests. t parentR( ( t pats_builtR t compile_patternt p0t p1t p2RR t zipRb t matcht False( R( t patternst patternRc t results( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt in_special_context� s %"c C s� | j } | d k r+ | j t j k r+ t S| j } | j t j t j f k rS t S| j t j k r| | j d | k r| t S| j t j k s� | j t j k r� | d k r� | j t j k s� | j d | k r� t St S( sG Check that something isn't an attribute or function name etc. i N( t prev_siblingR+ t typeR R! Rk Rc R t funcdeft classdeft expr_stmtRO t parameterst typedargslistR RR ( R( t prevRc ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt is_probably_builtin� s % c C sp xi | d k rk | j t j k r_ t | j � d k r_ | j d } | j t j k r_ | j Sn | j } q Wd S( s Find the indentation of *node*.i i u N( R+ Rq R t suiteRS RO R t INDENTR Rc ( R( t indent( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt find_indentation� s ' c C sW | j t j k r | S| j � } | j d } | _ t t j | g � } | | _ | S( N( Rq R Ry R" Rc R+ R ( R( Rc Ry ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt make_suite s c C s; x4 | j t j k r6 | j } | s t d � � q q W| S( s Find the top level namespace.s, root found before file_input node was found.( Rq R t file_inputRc t ValueError( R( ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt find_root s c C s" t | t | � | � } t | � S( s� Returns true if name is imported from package at the top level of the tree which node belongs to. To cover the case of an import like 'import foo', use None for the package and 'foo' for the name. ( t find_bindingR� t bool( t packageR R( t binding( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt does_tree_import s c C s | j t j t j f k S( s0 Returns true if the node is an import statement.( Rq R t import_nameRK ( R( ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt is_import" s c C s� d � } t | � } t | | | � r+ d Sd } } xn t | j � D]] \ } } | | � sc qE n x1 t | j | � D] \ } } | | � sw Pqw qw W| | } PqE W| d k rxb t | j � D]N \ } } | j t j k r� | j r� | j d j t j k r� | d } Pq� q� Wn | d k r\t t j t t j d � t t j | d d �g � } n$ t | t t j | d d �g � } | t � g } | j | t t j | � � d S( s\ Works like `does_tree_import` but adds an import statement if it was not imported. c S s, | j t j k o+ | j o+ t | j d � S( Ni ( Rq R t simple_stmtRO R� ( R( ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt is_import_stmt) s Ni i u importR u ( R� R� R_ RO Rq R R� R R8 R+ R R� R R RQ R/ R# ( R� R R( R� t roott insert_post offsett idxt node2t import_RO ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt touch_import& s4 !$c C sK xD| j D]9} d } | j t j k rs t | | j d � rB | St | t | j d � | � } | r | } q n�| j t j t j f k r� t | t | j d � | � } | r | } q na| j t j k r|t | t | j d � | � } | r� | } q x t | j d � D]b \ } } | j t j k r| j d k rt | t | j | d � | � } | ru| } quqqWn� | j t k r�| j d j | k r�| } nv t | | | � r�| } n[ | j t j k r�t | | | � } n4 | j t j k r t | | j d � r | } q n | r | s0| St | � rC| Sq q Wd S( s� Returns the node which binds variable name, otherwise None. If optional argument package is supplied, only imports will be returned. See test cases for examples.i i����i i t :i i N( RO R+ Rq R t for_stmtt _findR� R} t if_stmtt while_stmtt try_stmtR_ R t COLONR t _def_symst _is_import_bindingR� Rt R� ( R R( R� t childt retR2 t it kid( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyR� T sH !# % c C s| | g } xl | rw | j � } | j d k rO | j t k rO | j | j � q | j t j k r | j | k r | Sq Wd S( Ni ( t popRq t _block_symst extendRO R R R R+ ( R R( t nodes( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyR� s !c C s' | j t j k r| r| j d } | j t j k r� x� | j D]Z } | j t j k rw | j d j | k r� | SqB | j t j k rB | j | k rB | SqB Wq#| j t j k r� | j d } | j t j k r| j | k r| Sq#| j t j k r#| j | k r#| Sn| j t j k r#| rMt | j d � j � | k rMd S| j d } | rst d | � rsd S| j t j k r�t | | � r�| S| j t j k r�| j d } | j t j k r | j | k r | Sq#| j t j k r| j | k r| S| r#| j t j k r#| Sn d S( s� Will reuturn node if node will import name, or node will import * from package. None is returned otherwise. See test cases for examples. i i i����i u asN( Rq R R� RO t dotted_as_namest dotted_as_nameR R R RK t unicodet stripR+ R� RJ t import_as_namet STAR( R( R R� RP R� t lastR2 ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyR� � s@ ! !!% ! !!N(: t __doc__t itertoolsR t pgen2R t pytreeR R t pygramR R t R R R R R R+ R R R R R) R- R/ R0 R3 R7 R: RH RQ RT RU RV RX t consuming_callsRb Rf Rg Rh Rk Rd Ro Rx R| R} R� R� R� R� Rs Rr R� R� R R� R� R� ( ( ( s7 /opt/alt/python27/lib64/python2.7/lib2to3/fixer_util.pyt <module> sZ - *
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