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Otherwise, return True. c3s|]}ˆjjd|iƒVqdS)ÚextraN)ÚmarkerÚevaluate)Ú.0rW)rÃrrú sz*_ReqExtras.markers_pass..N)N)rHrXÚany)rrÃr9Úextra_evalsr)rÃrr7s z_ReqExtras.markers_pass)N)rrrrr7rrrrr3sr3c@sxeZdZdZdeƒefdd„Zdd„Zdd„Zdd d „Z dd„Z d d„Zddd„Zddd„Z dd„Zdd„Zdd„ZdS)r’z5Searchable snapshot of distributions on a search pathNcCs i|_||_||_|j|ƒdS)a!Snapshot distributions available on a search path Any distributions found on `search_path` are added to the environment. `search_path` should be a sequence of ``sys.path`` items. If not supplied, ``sys.path`` is used. `platform` is an optional string specifying the name of the platform that platform-specific distributions must be compatible with. If unspecified, it defaults to the current platform. `python` is an optional string naming the desired version of Python (e.g. ``'3.3'``); it defaults to the current version. 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N)rtrárŽr )rrar*rÂrrrr`Os zEnvironment.scancCs|jƒ}|jj|gƒS)aReturn a newest-to-oldest list of distributions for `project_name` Uses case-insensitive `project_name` comparison, assuming all the project's distributions use their project's name converted to all lowercase as their key. )r>r^rH)rr;Údistribution_keyrrrr*^szEnvironment.__getitem__cCsL|j|ƒrH|jƒrH|jj|jgƒ}||krH|j|ƒ|jtjdƒdddS)zLAdd `dist` if we ``can_add()`` it and it has not already been added ÚhashcmpT)r)ÚreverseN) rdÚhas_versionr^r$r)rArFÚoperatorÚ attrgetter)rrÂr#rrrr is zEnvironment.addFcCsfy|j|ƒ}Wntk r,|s$‚d}YnX|dk r:|Sx||jD]}||krF|SqFW|j||ƒS)a¸Find distribution best matching `req` and usable on `working_set` This calls the ``find(req)`` method of the `working_set` to see if a suitable distribution is already active. (This may raise ``VersionConflict`` if an unsuitable version of the project is already active in the specified `working_set`.) 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