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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. NFzutf-8c s( y � � SWn t k r# d SYn Xd S)N� )� StopIterationr )�readliner r � read_or_stop� s z%detect_encoding.<locals>.read_or_stopc s0 y | j d � } WnB t k rW d } � d k rG d j | � � } t | � � Yn Xt j | � } | sq d St | d � } y t | � } WnI t k r� � d k r� d | } n d j � | � } t | � � Yn X� r,| j d k r"� d k rd } n d j � � } t | � � | d 7} | S) Nzutf-8z'invalid or missing encoding declarationz {} for {!r}r zunknown encoding: z unknown encoding for {!r}: {}zencoding problem: utf-8z encoding problem for {!r}: utf-8z-sig) r� �UnicodeDecodeError�format� SyntaxError� cookie_re�findallr� r� � LookupErrorr� )�line� line_string�msg�matches�encoding�codec)� bom_foundr� r r � find_cookie� s6 z$detect_encoding.<locals>.find_cookieTr z utf-8-sig)�__self__r� �AttributeErrorr> r� )r� r� �defaultr� r� �first�secondr )r� r� r� r r� } s4 & r� )r? r( � )�unescape)�ChainMap)�MutableMapping)�recursive_reprz...c s � f d d � } | S)zm Decorator to make a repr function return fillvalue for a recursive call c sp t � � � � � f d d � } t � d � | _ t � d � | _ t � d � | _ t � d i � | _ | S)Nc sW t | � t � f } | � k r% � S� j | � z � | � } Wd � j | � X| S)N)�id� get_identr� �discard)r` rY �result)� fillvalue� repr_running� user_functionr r �wrapper� s z=_recursive_repr.<locals>.decorating_function.<locals>.wrapperr5 rc r4 �__annotations__)r� �getattrr5 rc r4 r� )r� r� )r� )r� r� r �decorating_function� s z,_recursive_repr.<locals>.decorating_functionr )r� r� r )r� r �_recursive_repr� s r� c @ s e Z d Z d Z d d � Z d d � Z d d � Z d d d � Z d d � Z d d � Z d d � Z d d � Z e � d d � � Z e d d � � Z d d � Z e Z d d � Z e d d � � Z d d � Z d d � Z d! d" � Z d# d$ � Z d% d& � Z d S)'r� a� A ChainMap groups multiple dicts (or other mappings) together to create a single, updateable view. The underlying mappings are stored in a list. That list is public and can accessed or updated using the *maps* attribute. There is no other state. Lookups search the underlying mappings successively until a key is found. In contrast, writes, updates, and deletions only operate on the first mapping. c G s t | � p i g | _ d S)z�Initialize a ChainMap by setting *maps* to the given mappings. If no mappings are provided, a single empty dictionary is used. N)�list�maps)r` r� r r r rb s zChainMap.__init__c C s t | � � d S)N)�KeyError)r` rY r r r � __missing__ s zChainMap.__missing__c C sB x2 | j D]' } y | | SWq t k r0 Yq Xq W| j | � S)N)r� r� r� )r` rY �mappingr r r � __getitem__ s zChainMap.__getitem__Nc C s | | k r | | S| S)Nr )r` rY r� r r r rS % s z ChainMap.getc C s t t � j | j � � S)N)rT r� �unionr� )r` r r r �__len__( s zChainMap.__len__c C s t t � j | j � � S)N)�iterr� r� r� )r` r r r �__iter__+ s zChainMap.__iter__c s t � f d d � | j D� � S)Nc 3 s | ] } � | k Vq d S)Nr )rr �m)rY r r ru / s z(ChainMap.__contains__.<locals>.<genexpr>)r r� )r` rY r )rY r � __contains__. s zChainMap.__contains__c C s t | j � S)N)r r� )r` r r r �__bool__1 s zChainMap.__bool__c C s% d j | d j t t | j � � � S)Nz{0.__class__.__name__}({1})z, )r� rA rU r; r� )r` r r r �__repr__4 s zChainMap.__repr__c G s | t j | | � � S)z?Create a ChainMap with a single dict created from the iterable.)�dict�fromkeys)�cls�iterabler� r r r r� 9 s zChainMap.fromkeysc C s* | j | j d j � | j d d � � S)zHNew ChainMap or subclass with a new copy of maps[0] and refs to maps[1:]r r N)� __class__r� �copy)r` r r r r� > s z ChainMap.copyc C s | j i | j � S)z;New ChainMap with a new dict followed by all previous maps.)r� r� )r` r r r � new_childD s zChainMap.new_childc C s | j | j d d � � S)zNew ChainMap from maps[1:].r N)r� r� )r` r r r �parentsH s zChainMap.parentsc C s | | j d | <d S)Nr )r� )r` rY rZ r r r � __setitem__M s zChainMap.__setitem__c C s@ y | j d | =Wn' t k r; t d j | � � � Yn Xd S)Nr z(Key not found in the first mapping: {!r})r� r� r� )r` rY r r r � __delitem__P s zChainMap.__delitem__c C s: y | j d j � SWn t k r5 t d � � Yn Xd S)zPRemove and return an item pair from maps[0]. Raise KeyError is maps[0] is empty.r z#No keys found in the first mapping.N)r� �popitemr� )r` r r r r� V s zChainMap.popitemc G sI y | j d j | | � SWn' t k rD t d j | � � � Yn Xd S)zWRemove *key* from maps[0] and return its value. Raise KeyError if *key* not in maps[0].r z(Key not found in the first mapping: {!r}N)r� �popr� r� )r` rY r� r r r r� ] s z ChainMap.popc C s | j d j � d S)z'Clear maps[0], leaving maps[1:] intact.r N)r� �clear)r` r r r r� d s zChainMap.clear)r4 r5 r6 rc rb r� r� rS r� r� r� r� r� r� � classmethodr� r� �__copy__r� �propertyr� r� r� r� r� r� r r r r r� s( r� )�cache_from_sourcec C sD | j d � s t � | d k r' t } | r6 d } n d } | | S)Nz.py�c�o)rq �AssertionError� __debug__)rf �debug_override�suffixr r r r n s r )� OrderedDict)r� )�KeysView� ValuesView� ItemsViewc @ sr e Z d Z d Z d d � Z e j d d � Z e j d d � Z d d � Z d d � Z d d � Z d d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z e Z e � Z e d d � Z d! d" d# � Z d! d$ d% � Z d& d' � Z d( d) � Z e d! d* d+ � � Z d, d- � Z d. d/ � Z d0 d1 � Z d2 d3 � Z d4 d5 � Z! d! S)6r z)Dictionary that remembers insertion orderc O s� t | � d k r( t d t | � � � y | j WnA t k rv g | _ } | | d g | d d � <i | _ Yn X| j | | � d S)z�Initialize an ordered dictionary. Signature is the same as for regular dictionaries, but keyword arguments are not recommended because their insertion order is arbitrary. r z$expected at most 1 arguments, got %dN)rT r� �_OrderedDict__rootr� �_OrderedDict__map�_OrderedDict__update)r` r� �kwds�rootr r r rb � s zOrderedDict.__init__c C sY | | k rE | j } | d } | | | g | d <| d <| j | <| | | | � d S)z!od.__setitem__(i, y) <==> od[i]=yr r N)r r )r` rY rZ Z dict_setitemr �lastr r r r� � s &zOrderedDict.__setitem__c C s@ | | | � | j j | � \ } } } | | d <| | d <d S)z od.__delitem__(y) <==> del od[y]r r N)r r� )r` rY Z dict_delitem� link_prev� link_nextr r r r� � s zOrderedDict.__delitem__c c s= | j } | d } x# | | k r8 | d V| d } q Wd S)zod.__iter__() <==> iter(od)r r( N)r )r` r �currr r r r� � s zOrderedDict.__iter__c c s= | j } | d } x# | | k r8 | d V| d } q Wd S)z#od.__reversed__() <==> reversed(od)r r( N)r )r` r r r r r � __reversed__� s zOrderedDict.__reversed__c C s� yZ x$ | j j � D] } | d d � =q W| j } | | d g | d d � <| j j � Wn t k rn Yn Xt j | � d S)z.od.clear() -> None. Remove all items from od.N)r � itervaluesr r� r� r� )r` �noder r r r r� � s zOrderedDict.clearTc C s� | s t d � � | j } | rL | d } | d } | | d <| | d <n( | d } | d } | | d <| | d <| d } | j | =t j | | � } | | f S)z�od.popitem() -> (k, v), return and remove a (key, value) pair. Pairs are returned in LIFO order if last is true or FIFO order if false. zdictionary is emptyr r r( )r� r r r� r� )r` r r �linkr r rY rZ r r r r� � s zOrderedDict.popitemc C s t | � S)z od.keys() -> list of keys in od)r� )r` r r r �keys� s zOrderedDict.keysc s � f d d � � D� S)z#od.values() -> list of values in odc s g | ] } � | � q Sr r )rr rY )r` r r rv � s z&OrderedDict.values.<locals>.<listcomp>r )r` r )r` r �values� s zOrderedDict.valuesc s � f d d � � D� S)z.od.items() -> list of (key, value) pairs in odc s g | ] } | � | f � q Sr r )rr rY )r` r r rv � s z%OrderedDict.items.<locals>.<listcomp>r )r` r )r` r �items� s zOrderedDict.itemsc C s t | � S)z0od.iterkeys() -> an iterator over the keys in od)r� )r` r r r �iterkeys� s zOrderedDict.iterkeysc c s x | D] } | | Vq Wd S)z2od.itervalues -> an iterator over the values in odNr )r` �kr r r r � s zOrderedDict.itervaluesc c s$ x | D] } | | | f Vq Wd S)z=od.iteritems -> an iterator over the (key, value) items in odNr )r` r r r r � iteritems s zOrderedDict.iteritemsc O s t | � d k r. t d t | � f � � n | s@ t d � � | d } f } t | � d k rl | d } t | t � r� xw | D] } | | | | <q� WnX t | d � r� xF | j � D] } | | | | <q� Wn! x | D] \ } } | | | <q� Wx$ | j � D] \ } } | | | <qWd S)a� od.update(E, **F) -> None. Update od from dict/iterable E and F. If E is a dict instance, does: for k in E: od[k] = E[k] If E has a .keys() method, does: for k in E.keys(): od[k] = E[k] Or if E is an iterable of items, does: for k, v in E: od[k] = v In either case, this is followed by: for k, v in F.items(): od[k] = v r( z8update() takes at most 2 positional arguments (%d given)z,update() takes at least 1 argument (0 given)r r r N)rT r� r r� �hasattrr r )r� r r` �otherrY rZ r r r r_ s& zOrderedDict.updatec C s@ | | k r! | | } | | =| S| | j k r< t | � � | S)z�od.pop(k[,d]) -> v, remove specified key and return the corresponding value. If key is not found, d is returned if given, otherwise KeyError is raised. )�_OrderedDict__markerr� )r` rY r� r� r r r r� * s zOrderedDict.popNc C s" | | k r | | S| | | <| S)zDod.setdefault(k[,d]) -> od.get(k,d), also set od[k]=d if k not in odr )r` rY r� r r r � setdefault7 s zOrderedDict.setdefaultc C s | s i } t | � t � f } | | k r1 d Sd | | <z5 | sU d | j j f Sd | j j | j � f SWd | | =Xd S)zod.__repr__() <==> repr(od)z...r z%s()z%s(%r)N)r� � _get_identr� r4 r )r` Z _repr_runningZcall_keyr r r r� > s zOrderedDict.__repr__c s~ � f d d � � D� } t � � j � } x' t t � � D] } | j | d � q; W| rn � j | f | f S� j | f f S)z%Return state information for picklingc s g | ] } | � | g � q Sr r )rr r )r` r r rv N s z*OrderedDict.__reduce__.<locals>.<listcomp>N)�varsr� r r� r� )r` r � inst_dictr r )r` r � __reduce__L s zOrderedDict.__reduce__c C s | j | � S)z!od.copy() -> a shallow copy of od)r� )r` r r r r� V s zOrderedDict.copyc C s( | � } x | D] } | | | <q W| S)z�OD.fromkeys(S[, v]) -> New ordered dictionary with keys from S and values equal to v (which defaults to None). r )r� r� rZ �drY r r r r� Z s zOrderedDict.fromkeysc C sM t | t � r= t | � t | � k o< | j � | j � k St j | | � S)z�od.__eq__(y) <==> od==y. Comparison to another OD is order-sensitive while comparison to a regular mapping is order-insensitive. )r r rT r r� �__eq__)r` r r r r r( e s .zOrderedDict.__eq__c C s | | k S)Nr )r` r r r r �__ne__n s zOrderedDict.__ne__c C s t | � S)z@od.viewkeys() -> a set-like object providing a view on od's keys)r )r` r r r �viewkeyss s zOrderedDict.viewkeysc C s t | � S)z<od.viewvalues() -> an object providing a view on od's values)r )r` r r r � viewvaluesw s zOrderedDict.viewvaluesc C s t | � S)zBod.viewitems() -> a set-like object providing a view on od's items)r )r` r r r � viewitems{ s zOrderedDict.viewitems)"r4 r5 r6 rc rb r� r� r� r� r r� r� r r r r r r r_ r �objectr! r� r" r� r& r� r� r� r( r) r* r+ r, r r r r r � s: r )�BaseConfigurator� valid_identz^[a-z_][a-z0-9_]*$c C s) t j | � } | s% t d | � � d S)Nz!Not a valid Python identifier: %rT)� IDENTIFIERr, rR )r r� r r r r/ � s r/ c @ s1 e Z d Z d Z d d � Z d d d � Z d S)�ConvertingDictz A converting dictionary wrapper.c C sk t j | | � } | j j | � } | | k rg | | | <t | � t t t f k rg | | _ | | _ | S)N) r� r� � configurator�convertr� r1 �ConvertingList�ConvertingTuple�parentrY )r` rY rZ r� r r r r� � s zConvertingDict.__getitem__Nc C sn t j | | | � } | j j | � } | | k rj | | | <t | � t t t f k rj | | _ | | _ | S)N) r� rS r2 r3 r� r1 r4 r5 r6 rY )r` rY r� rZ r� r r r rS � s zConvertingDict.get)r4 r5 r6 rc r� rS r r r r r1 � s r1 c C sd t j | | | � } | j j | � } | | k r` t | � t t t f k r` | | _ | | _ | S)N) r� r� r2 r3 r� r1 r4 r5 r6 rY )r` rY r� rZ r� r r r r� � s r� c @ s1 e Z d Z d Z d d � Z d d d � Z d S) r4 zA converting list wrapper.c C sk t j | | � } | j j | � } | | k rg | | | <t | � t t t f k rg | | _ | | _ | S)N) r� r� r2 r3 r� r1 r4 r5 r6 rY )r` rY rZ r� r r r r� � s zConvertingList.__getitem__r c C sX t j | | � } | j j | � } | | k rT t | � t t t f k rT | | _ | S)N) r� r� r2 r3 r� r1 r4 r5 r6 )r` �idxrZ r� r r r r� � s zConvertingList.popN���)r4 r5 r6 rc r� r� r r r r r4 � s r4 c @ s" e Z d Z d Z d d � Z d S)r5 zA converting tuple wrapper.c C sa t j | | � } | j j | � } | | k r] t | � t t t f k r] | | _ | | _ | S)N) �tupler� r2 r3 r� r1 r4 r5 r6 rY )r` rY rZ r� r r r r� � s zConvertingTuple.__getitem__N)r4 r5 r6 rc r� r r r r r5 � s r5 c @ s� e Z d Z d Z e j d � Z e j d � Z e j d � Z e j d � Z e j d � Z d d d d i Z e e � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d S)r. zQ The configurator base class which defines some useful defaults. z%^(?P<prefix>[a-z]+)://(?P<suffix>.*)$z ^\s*(\w+)\s*z^\.\s*(\w+)\s*z^\[\s*(\w+)\s*\]\s*z^\d+$rs � ext_convert�cfg� cfg_convertc C s t | � | _ | | j _ d S)N)r1 �configr2 )r` r= r r r rb � s zBaseConfigurator.__init__c C s� | j d � } | j d � } yz | j | � } x` | D]X } | d | 7} y t | | � } Wq7 t k r� | j | � t | | � } Yq7 Xq7 W| SWn] t k r� t j � d d � \ } } t d | | f � } | | | _ | _ | � Yn Xd S)zl Resolve strings to objects using standard import and attribute syntax. r7 r r NzCannot resolve %r: %s) r9 r� �importerr� r� � ImportErrorr{ r� rR � __cause__� __traceback__) r` r r� �used�foundrK �e�tb�vr r r �resolve� s" zBaseConfigurator.resolvec C s | j | � S)z*Default converter for the ext:// protocol.)rG )r` rZ r r r r: s z BaseConfigurator.ext_convertc C sY | } | j j | � } | d k r7 t d | � � n | | j � d � } | j | j � d } x� | rT| j j | � } | r� | | j � d } n� | j j | � } | r | j � d } | j j | � s� | | } n9 y t | � } | | } Wn t k r| | } Yn X| r;| | j � d � } qg t d | | f � � qg W| S)z*Default converter for the cfg:// protocol.NzUnable to convert %rr zUnable to convert %r at %r) � WORD_PATTERNr, rR �endr= �groups� DOT_PATTERN� INDEX_PATTERN� DIGIT_PATTERN�intr� )r` rZ �restr� r' r7 �nr r r r< s2 z BaseConfigurator.cfg_convertc C s& t | t � r7 t | t � r7 t | � } | | _ n� t | t � rn t | t � rn t | � } | | _ n� t | t � r� t | t � r� t | � } | | _ n} t | t � r"| j j | � } | r"| j � } | d } | j j | d � } | r"| d } t | | � } | | � } | S)z� Convert values to an appropriate type. dicts, lists and tuples are replaced by their converting alternatives. Strings are checked to see if they have a conversion format and are converted if they do. �prefixNr )r r1 r� r2 r4 r� r5 r9 � string_types�CONVERT_PATTERNr, � groupdict�value_convertersrS r� )r` rZ r� r' rQ � converterr r r r r3 2 s* zBaseConfigurator.convertc s� � j d � } t | � s* | j | � } � j d d � } t � f d d � � D� � } | | � } | r� x* | j � D] \ } } t | | | � qz W| S)z1Configure an object with a user-supplied factory.z()r7 Nc s, g | ]" } t | � r | � | f � q Sr )r/ )rr r )r= r r rv U s z5BaseConfigurator.configure_custom.<locals>.<listcomp>)r� r� rG r� r �setattr)r` r= r �propsra r� r� rZ r )r= r �configure_customN s z!BaseConfigurator.configure_customc C s t | t � r t | � } | S)z0Utility function which converts lists to tuples.)r r� r9 )r` rZ r r r �as_tuple\ s zBaseConfigurator.as_tupleN)r4 r5 r6 rc r* r+ rS rH rK rL rM rU � staticmethod� __import__r> rb rG r: r< r3 rY rZ r r r r r. � s " r. )r r� )�� __future__r re r* r{ �sslr? � version_infor � basestringrR r r� �typesr � file_type� __builtin__�builtins� ConfigParser� configparserZ _backportr r r r r r �urllibr r r r r r r r �urllib2r r r r r r r! r" r# r$ �httplib� xmlrpclib�Queue�queuer% �htmlentitydefs� raw_input� itertoolsr& �filterr' r1 r) r/ �io�strr0 � urllib.parse�urllib.request� urllib.error� http.client�client�request� xmlrpc.client� html.parser� html.entities�entities�inputr2 r3 rR rM r\ r] r- rd �F_OK�X_OK�zipfiler� r� r r� ZBaseZipExtFiler| r� r� r� � NameError�collections.abcr� r� r� r� �getfilesystemencodingr� r� �tokenizer� �codecsr� r� r+ r� r� �htmlr? �cgir� � collectionsr� r� �reprlibr� r� �importlib.utilr �impr �threadr� r# � dummy_thread�_abcollr r r r� �logging.configr. r/ �Ir0 r1 r� r� r4 r9 r5 r r r r �<module> s* (4 @ @F 2+ !A [ b �
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