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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( u� Initialize a ChainMap by setting *maps* to the given mappings. If no mappings are provided, a single empty dictionary is used. 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Create a ChainMap with a single dict created from the iterable.( t dictt fromkeys( t clst iterablet args( ( sO /opt/alt/python27/lib/python2.7/site-packages/backports/configparser/helpers.pyR: � s c C` s$ | j | j d j � | j d � S( ub New ChainMap or subclass with a new copy of maps[0] and refs to maps[1:] i i ( t __class__R# t copy( R ( ( sO /opt/alt/python27/lib/python2.7/site-packages/backports/configparser/helpers.pyR? � s c C` s | j i | j � S( u; New ChainMap with a new dict followed by all previous maps.( R> R# ( R ( ( sO /opt/alt/python27/lib/python2.7/site-packages/backports/configparser/helpers.pyt new_child� s c C` s | j | j d � S( u New ChainMap from maps[1:].i ( R> R# ( R ( ( sO /opt/alt/python27/lib/python2.7/site-packages/backports/configparser/helpers.pyt parents� s c C` s | | j d | <d S( Ni ( R# ( R R t value( ( sO /opt/alt/python27/lib/python2.7/site-packages/backports/configparser/helpers.pyt __setitem__� s c C` s? y | j d | =Wn& t k r: t d j | � � � n Xd S( Ni u( Key not found in the first mapping: {!r}( R# R% R4 ( R R ( ( sO /opt/alt/python27/lib/python2.7/site-packages/backports/configparser/helpers.pyt __delitem__� s c C` s9 y | j d j � SWn t k r4 t d � � n Xd S( uj Remove and return an item pair from maps[0]. Raise KeyError is maps[0] is empty. i u# No keys found in the first mapping.N( R# t popitemR% ( R ( ( sO /opt/alt/python27/lib/python2.7/site-packages/backports/configparser/helpers.pyRE � s c G` sH y | j d j | | � SWn& t k rC t d j | � � � n Xd S( uq Remove *key* from maps[0] and return its value. Raise KeyError if *key* not in maps[0]. i u( Key not found in the first mapping: {!r}N( R# t popR% R4 ( R R R= ( ( sO /opt/alt/python27/lib/python2.7/site-packages/backports/configparser/helpers.pyRF � s c C` s | j d j � d S( u' Clear maps[0], leaving maps[1:] intact.i N( R# t clear( R ( ( sO /opt/alt/python27/lib/python2.7/site-packages/backports/configparser/helpers.pyRG � s N( R R R R$ R& R( R R* R- R/ R3 R R8 t classmethodR: R? t __copy__R@ t propertyRA RC RD RE RF RG ( ( ( sO /opt/alt/python27/lib/python2.7/site-packages/backports/configparser/helpers.pyR! Z s& ( t ChainMapu ABCu __ABCt __metaclass__t _PathLikec B` s/ e Z d Z e j d � � Z e d � � Z RS( uC Abstract base class for implementing the file system path protocol.c C` s t � d S( u9 Return the file system path representation of the object.N( t NotImplementedError( R ( ( sO /opt/alt/python27/lib/python2.7/site-packages/backports/configparser/helpers.pyt __fspath__� s c C` s+ t t | d � p' t o' t | t j � � S( Nu __fspath__( t boolt hasattrt pathlibt issubclasst Path( R; t subclass( ( sO /opt/alt/python27/lib/python2.7/site-packages/backports/configparser/helpers.pyt __subclasshook__� s ( R R R t abct abstractmethodRO RH RV ( ( ( sO /opt/alt/python27/lib/python2.7/site-packages/backports/configparser/helpers.pyRM � s u PathLikec C` s� t | t t f � r | St | d � rE t | t j � rE t | � St | � } y | j | � } Wn9 t k r� t | d � r� � q� t d | j � � n Xt | t t f � r� | St d j | j t | � j � � � d S( ua Return the path representation of a path-like object. If str or bytes is passed in, it is returned unchanged. Otherwise the os.PathLike interface is used to get the path representation. If the path representation is not str or bytes, TypeError is raised. If the provided path is not str, bytes, or os.PathLike, TypeError is raised. u __fspath__u/ expected str, bytes or os.PathLike object, not u7 expected {}.__fspath__() to return str or bytes, not {}N( t isinstancet strt bytesRQ RR RT t typeRO t AttributeErrort TypeErrorR R4 ( t patht path_typet path_repr( ( sO /opt/alt/python27/lib/python2.7/site-packages/backports/configparser/helpers.pyt _fspath� s$ " u fspath(+ t __future__R R R R RW t ost collections.abcR t ImportErrort collectionsR R t ordereddictRR R t ioR t syst threadR t _threadt _dummy_threadt __all__t version_infot PY2t PY3RZ t native_strR\ R R R! RK R t ABCMetat objectR9 t _ABCRM t PathLikeRb t fspath( ( ( sO /opt/alt/python27/lib/python2.7/site-packages/backports/configparser/helpers.pyt <module> sd n - &