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Package resource API
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A resource is a logical file contained within a package, or a logical
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path separator is. Do not use os.path operations to manipulate resource
names being passed into the API.
The package resource API is designed to work with normal filesystem packages,
.egg files, and unpacked .egg files. It can also work in a limited way with
.zip files and with custom PEP 302 loaders that support the ``get_data()``
method.
This module is deprecated. Users are directed to :mod:`importlib.resources`,
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If `entry` is unspecified, it defaults to the ``.location`` of `dist`.
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set's ``.entries`` (if it wasn't already present).
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doesn't already have a distribution in the set, unless `replace=True`.
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entry or distribution in the working set. `installer`, if supplied,
will be invoked with each requirement that cannot be met by an
already-installed distribution; it should return a ``Distribution`` or
``None``.
Unless `replace_conflicting=True`, raises a VersionConflict exception
if
any requirements are found on the path that have the correct name but
the wrong version. Otherwise, if an `installer` is supplied it will be
invoked to obtain the correct version of the requirement and activate
it.
`extras` is a list of the extras to be used with these requirements.
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extra = "my_extra"`, which would otherwise be interpreted as a purely
optional requirement. Instead, we want to be able to assert that these
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distributions, errors = working_set.find_plugins(
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)
# add plugins+libs to sys.path
map(working_set.add, distributions)
# display errors
print('Could not load', errors)
The `plugin_env` should be an ``Environment`` instance that contains
only distributions that are in the project's "plugin directory" or
directories. The `full_env`, if supplied, should be an ``Environment``
contains all currently-available distributions. If `full_env` is not
supplied, one is created automatically from the ``WorkingSet`` this
method is called on, which will typically mean that every directory on
``sys.path`` will be scanned for distributions.
`installer` is a standard installer callback as used by the
``resolve()`` method. The `fallback` flag indicates whether we should
attempt to resolve older versions of a plugin if the newest version
cannot be resolved.
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`distributions` is a list of the distributions found in `plugin_env`
that were loadable, along with any other distributions that are needed
to resolve their dependencies. `error_info` is a dictionary mapping
unloadable plugin distributions to an exception instance describing the
error that occurred. Usually this will be a ``DistributionNotFound`` or
``VersionConflict`` instance.
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Map each requirement to the extras that demanded it.
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Zd ZdS )rn z5Searchable snapshot of distributions on a search pathNc Z i | _ || _ || _ | | dS )a! Snapshot distributions available on a search path
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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. ``'3.6'``);
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running platform or Python version.
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lowercase as their key.
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This calls the ``find(req)`` method of the `working_set` to see if a
suitable distribution is already active. (This may raise
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active in the specified `working_set`.) If a suitable distribution
isn't active, this method returns the newest distribution in the
environment that meets the ``Requirement`` in `req`. If no suitable
distribution is found, and `installer` is supplied, then the result of
calling the environment's ``obtain(req, installer)`` method will be
returned.
N)r ru r= obtain)r r rh rv rw r s r r zEnvironment.best_matchV s ##C((DD &
DDD KM Ds{{ {{3 ***s **c | || S dS )a Obtain a distribution matching `requirement` (e.g. via download)
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None is returned instead. This method is a hook that allows subclasses
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The following attributes are available from instances of this exception:
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The resource manager that raised this exception
cache_path
The base directory for resource extraction
original_error
The exception instance that caused extraction to fail
Nr r r r rx rx s r rx c x e Zd ZdZdZd Zd Zd Zd Zd Z d Z
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r c H t | | | S )z9Return a readable file-like object for specified resource)r[ r* r s r rb z ResourceManager.resource_stream ( 233GG -
r c H t | | | S )z%Return specified resource as a string)r[ r, r s r ra z ResourceManager.resource_string r r c F t | | S )z1List the contents of the named resource directory)r[ rd r s r rd z ResourceManager.resource_listdir s 233DD]SSSr c $ t j d }| j p
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The following error occurred while trying to extract file(s)
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The Python egg cache directory is currently set to:
{cache_path}
Perhaps your account does not have write access to this directory?
You can change the cache directory by setting the PYTHON_EGG_CACHE
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Nr )
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" &((#
$ kdk 5 5FHH 5 566 # $ r r c | j p
t }t j j ||dz g|R } t | n$# t $ r | Y nw xY w| | d| j |< |S )a Return absolute location in cache for `archive_name` and `names`
The parent directory of the resulting path will be created if it does
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enclosing egg (which may not be the name of the enclosing zipfile!),
including its ".egg" extension. `names`, if provided, should be a
sequence of path name parts "under" the egg's extraction location.
This method should only be called by resource providers that need to
obtain an extraction location, and only for names they intend to
extract, as it tracks the generated names for possible cleanup later.
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If the default extraction path is overridden and set to an insecure
location, such as /tmp, it opens up an opportunity for an attacker to
replace an extracted file with an unauthorized payload. Warn the user
if a known insecure location is used.
See Distribute #375 for more details.
ntwindirNzExtraction path is writable by group/others and vulnerable to attack when used with get_resource_filename ({path}). Consider a more secure location (set with .set_extraction_path or the PYTHON_EGG_CACHE environment variable).r )
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Fwt}}$ $, ,$ "5 ,: ! ! xx! !C
M#{ + + + + + , ,r c t j dk r6t j | j dz dz }t j || dS dS )a4 Perform any platform-specific postprocessing of `tempname`
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have anything special they should do.
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that are already in the filesystem.
`tempname` is the current (temporary) name of the file, and `filename`
is the name it will be renamed to by the caller after this routine
returns.
posixim i N)r r r r chmod)r tempnamefilenamer s r postprocesszResourceManager.postprocess# sM 7g WX&&.%76AD HXt $ $ $ $ $ r c @ | j rt d || _ dS )a Set the base path where resources will be extracted to, if needed.
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path defaults to the return value of ``get_default_cache()``. (Which
is based on the ``PYTHON_EGG_CACHE`` environment variable, with various
platform-specific fallbacks. See that routine's documentation for more
details.)
Resources are extracted to subdirectories of this path based upon
information given by the ``IResourceProvider``. You may set this to a
temporary directory, but then you must call ``cleanup_resources()`` to
delete the extracted files when done. There is no guarantee that
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manager once resources have been extracted, unless you first call
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generally only be called when the extraction path is a temporary
directory exclusive to a single process. This method is not
automatically called; you must call it explicitly or register it as an
``atexit`` function if you wish to ensure cleanup of a temporary
directory used for extractions.
Nr )r forces r rl z!ResourceManager.cleanup_resourcesO r r r F)r r r r r r; re rf rc rb ra rd r r staticmethodr r rk rl r r r rp rp s 11O P P PR R R
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r rp c j t j d pt j d S )z
Return the ``PYTHON_EGG_CACHE`` environment variable
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)r s r r| r| p su 69$,,W55666 + 6 6 6//#s++v&W555556s +. A A10A1c | dd } t | }|r |d }| t | d }nd}| }dt | d }| d| S )a Fallback when ``safe_version`` is not safe enough
>>> parse_version(_forgiving_version('0.23ubuntu1'))
>>> parse_version(_forgiving_version('0.23-'))
>>> parse_version(_forgiving_version('0.-_'))
>>> parse_version(_forgiving_version('42.+?1'))
>>> parse_version(_forgiving_version('hello world'))
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rL r r^ r s r r r s
<<S ! !!r c v t | n'# t $ r}d|_ d|_ |cY d}~S d}~ww xY wdS )zo
Validate text as a PEP 508 environment marker; return an exception
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NF)r SyntaxErrorr lineno)textes r r r s[
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6166c t j | }| S # t j j $ r}t | |d}~ww xY w)z
Evaluate a PEP 508 environment marker.
Return a boolean indicating the marker result in this environment.
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This implementation uses the 'pyparsing' module.
N)r markersMarkerr
InvalidMarkerr! )r# r r r$ s r r r s` $"))$// * $ $ $!nn!#$s 25 A AA c e Zd ZdZdZdZdZd Zd Zd Z d Z
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Zd Zd Zd Zd Zd Zd Zd Zed Zd ZdS )r zETry to implement resources and metadata for arbitrary PEP 302 loadersNc t |dd | _ t j t |dd | _ d S )Nr __file__r )r r r r dirname module_path)r r s r r; zNullProvider.__init__ s= flD99 7??76:r+J+JKKr c 8 | | j | S r )_fnr- r r& r' s r r( z"NullProvider.get_resource_filename s xx(-888r c R t j | || S r )ioBytesIOr, r0 s r r* z NullProvider.get_resource_stream s" z$227MJJKKKr c ^ | | | j | S r )_getr/ r- r0 s r r, z NullProvider.get_resource_string % yy$"2MBBCCCr c ^ | | | j | S r )_hasr/ r- r r' s r r/ zNullProvider.has_resource r6 r c 8 | | j | S r )r/ egg_infor r s r _get_metadata_pathz NullProvider._get_metadata_path s xx
t,,,r c r | j s| j S | | }| | S r )r; r= r8 r r r s r r zNullProvider.has_metadata s7 } != &&t,,yy r c | j sdS | | }| | } | d S # t $ r*}|xj d || z
c_ d }~ww xY w)Nr utf-8z in {} file at path: {})r; r= r5 decodeUnicodeDecodeErrorreasonr )r r r valueexcs r r zNullProvider.get_metadata s } 2&&t,, $ <<(( (!
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A>%A99A>c F t | | S r r r r< s r r z NullProvider.get_metadata_lines 4,,T22333r c ^ | | | j | S r )_isdirr/ r- r9 s r rf zNullProvider.resource_isdir s% {{488D$4mDDEEEr c l | j o-| | | j | S r )r; rK r/ r< s r r zNullProvider.metadata_isdir s+ }KTXXdmT-J-J!K!KKr c ^ | | | j | S r )_listdirr/ r- r9 s r rd z NullProvider.resource_listdir s% }}TXXd&6
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