o
0i ` @ sl d Z ddlmZ ddlmZ ddlZddlZddlZddl Z ddl
Z ddl Z ddl m
Z
ddlZg dZeddZd e_ d
d Zd d
Zd.ddZd/ddZed0ddZd0ddZeejje dd ZG dd dZG dd d Z zddl Z dd l m Z d0d d Z ee e W n e y Y nw d d! Z!d0d"d#Z"d$d% Z#d&d' Z$d(d) Z%d*d+ Z&da'd,d- Z(dS )1z Utilities to support packages. )
namedtuple)singledispatchN)
ModuleType) get_importeriter_importers
get_loader find_loader
walk_packages iter_modulesget_data ImpImporter ImpLoader read_code extend_path
ModuleInfor zmodule_finder name ispkgz.A namedtuple with minimal info about a module.c C sJ z| j }W ||S ty$ | |}|du rY dS tj|| Y S w )z'Return the finder-specific module spec.N) find_specAttributeError find_module importlibutilspec_from_loader)findernamer loader r ./opt/alt/python310/lib64/python3.10/pkgutil.py _get_spec s
r c C s6 dd l }| d}|tjjkrd S | d || S )Nr )marshalreadr r MAGIC_NUMBERload)streamr magicr r r r ( s
r c # s i fdd t | |D ]V}|V |jrbzt|j W n% ty- |dur+||j Y q ty@ |dur=||j n Y q w ttj|j ddpLg } fdd| D } t | |jd |E dH q dS )a Yields ModuleInfo for all modules recursively
on path, or, if path is None, all accessible modules.
'path' should be either None or a list of paths to look for
modules in.
'prefix' is a string to output on the front of every module name
on output.
Note that this function must import all *packages* (NOT all
modules!) on the given path, in order to access the __path__
attribute to find submodules.
'onerror' is a function which gets called with one argument (the
name of the package which was being imported) if any exception
occurs while trying to import a package. If no onerror function is
supplied, ImportErrors are caught and ignored, while all other
exceptions are propagated, terminating the search.
Examples:
# list all modules python can access
walk_packages()
# list all submodules of ctypes
walk_packages(ctypes.__path__, ctypes.__name__+'.')
c S s | |v rdS d|| < d S )NTr )pmr r r seenR s zwalk_packages..seenN__path__c s g | ]} |s|qS r r ).0r& r( r r
i s z!walk_packages...)
r
ispkg
__import__r ImportError Exceptiongetattrsysmodulesr )pathprefixonerrorinfor r+ r r 5 s,
r c c sr | du r t }nt| trtdtt| }i }|D ]}t||D ]\}}||vr5d||< t|||V q"qdS )a Yields ModuleInfo for all submodules on path,
or, if path is None, all top-level modules on sys.path.
'path' should be either None or a list of paths to look for
modules in.
'prefix' is a string to output on the front of every module name
on output.
Nz9path must be None or list of paths to look for modules in )r
isinstancestr
ValueErrormapr iter_importer_modulesr )r5 r6 Z importersyieldedir r. r r r r
n s
r
c C s t | dsg S | |S )Nr
)hasattrr
)importerr6 r r r r> s
r> c c " | j d u s
tj | j sd S i }dd l}zt| j }W n ty( g }Y nw | |D ]_}||}|dks>||v r?q/tj | j |}d}|s}tj |r}d|vr}|}zt|} W n tyi g } Y nw | D ]}||}
|
dkr{d} nqlq/|rd|vrd||< || |fV q/d S Nr __init__Fr- Tr9 r5 osisdirinspectlistdirOSErrorsort
getmodulenamejoin) rB r6 r? rI filenamesfnmodnamer5 r. dircontentssubnamer r r _iter_file_finder_modules H
rT c C sD t t dt tdaW d d S 1 sw Y d S )Nignoreimp)warningscatch_warnings simplefilterDeprecationWarningr
import_modulerW r r r r _import_imp s
"r] c @ s. e Zd ZdZd
ddZd
ddZd dd ZdS ) r a PEP 302 Finder that wraps Python's "classic" import algorithm
ImpImporter(dirname) produces a PEP 302 finder that searches that
directory. ImpImporter(None) produces a PEP 302 finder that searches
the current sys.path, plus any modules that are frozen or built-in.
Note that ImpImporter does not currently support being used by placement
on sys.meta_path.
Nc C s t dt t || _d S Nz[This emulation is deprecated and slated for removal in Python 3.12; use 'importlib' instead)rX warnr[ r] r5 )selfr5 r r r rE s
zImpImporter.__init__c C s~ | dd }||kr| jd u rd S | jd u rd }ntj| jg}z t||\}}}W n
ty7 Y d S w t||||S )Nr- )splitr5 rG realpathrW r r0 r
)r` fullnamer5 rS filefilenameetcr r r r s
zImpImporter.find_moduler% c c rC rD rF ) r` r6 r? rI rO rP rQ r5 r. rR rS r r r r
rU zImpImporter.iter_modulesNr% )__name__
__module__ __qualname____doc__rE r r
r r r r r s
r c @ sn e Zd ZdZd ZZdd Zdd Zdd Zd d
Z d d Z
d
d Z dddZ dddZ
dd ZdddZdS )r
zBPEP 302 Loader that wraps Python's "classic" import algorithm
Nc C s. t dt t || _|| _|| _|| _d S r^ )rX r_ r[ r] re rf rd rg )r` rd re rf rg r r r rE s
zImpLoader.__init__c C sJ | zt|| j| j| j}W | jr| j |S | jr$| j w w rh )_reopenrW load_modulere rf rg close)r` rd modr r r ro s
zImpLoader.load_modulec C s6 t |d }| W d S 1 sw Y d S )Nrb)openr )r` pathnamere r r r r ' s $zImpLoader.get_datac C sb | j r+| j jr-| jd }|tjkrt| jd| _ d S |tjtjfv r/t| jd| _ d S d S d S d S )N rrr ) re closedrg rW PY_SOURCErs rf PY_COMPILED C_EXTENSION)r` mod_typer r r rn + s
zImpLoader._reopenc C s2 |d u r | j }|S || j krtd| j |f |S )Nz,Loader for module %s cannot handle module %s)rd r0 r` rd r r r _fix_name3 s
zImpLoader._fix_namec C s | |}| jd tjkS Nru )r} rg rW
PKG_DIRECTORYr| r r r
is_package; s
zImpLoader.is_packagec C s | |}| jd u rO| jd }|tjkr$| |}t|| jd| _| jS |tjkrC| zt
| j | _W | j | jS | j w |tj
krO| | _| jS )Nru exec)r} coderg rW rx
get_sourcecompilerf ry rn r re rp r
_get_delegateget_code)r` rd r{ sourcer r r r ? s"
zImpLoader.get_codec C s | |}| jd u rn| jd }|tjkr.| z| j | _W | j | jS | j w |tj krbt
j | j
d d r_t| j
d d d}| | _W d | jS 1 sZw Y | jS |tjkrn| | _| jS )Nru ra rv )r} r rg rW rx rn re r rp ry rG r5 existsrf rs r r r )r` rd r{ fr r r r P s*
zImpLoader.get_sourcec C s t | j}t|d}|jS )NrE )r rf r r )r` r specr r r r b s
zImpLoader._get_delegatec C sH | |}| jd }|tjkr| S |tjtjtjfv r"| j S d S r~ )
r} rg rW r r get_filenamerx ry rz rf )r` rd r{ r r r r g s
zImpLoader.get_filenamerh )rj rk rl rm r r rE ro r rn r} r r r r r r r r r r
s
r
) zipimporterc c s t tj| j }| j}t|}i }dd l}|D ]\}||s q||d t j
}t|dkrL|d drL|d |vrLd||d < ||d dfV t|dkrSq| |d }|dkr_q|rtd|vrt||vrtd||< || dfV qd S ) Nr ru r9 z __init__.pyTrE r- F) sorted zipimport_zip_directory_cachearchiver6 lenrI
startswithrb rG seprM ) rB r6 Zdirlist_prefixZplenr? rI rP rQ r r r iter_zipimport_modulesu s0
r c C sh zt j| }W |S ty3 t jD ]}z|| }t j| | W Y |S ty- Y qw d}Y |S w )zRetrieve a finder for the given path item
The returned finder is cached in sys.path_importer_cache
if it was newly created by a path hook.
The cache (or part of it) can be cleared manually if a
rescan of sys.path_hooks is necessary.
N)r3 path_importer_cacheKeyError
path_hooks
setdefaultr0 )Z path_itemrB path_hookr r r r s
r c c s | drd| }t|d| v r,| dd }t|}t|dd}|du r+dS n tjE dH tj }|D ]}t
|V q7dS )a Yield finders for the given module name
If fullname contains a '.', the finders will be for the package
containing fullname, otherwise they will be all registered top level
finders (i.e. those on both sys.meta_path and sys.path_hooks).
If the named module is in a package, that package is imported as a side
effect of invoking this function.
If no module name is specified, all top level finders are produced.
r- 'Relative module name {!r} not supportedr r) N) r formatr0
rpartitionr r\ r2 r3 meta_pathr5 r )rd msgZpkg_namepkgr5 itemr r r r s
r c C st | t jv rt j| } | du rdS t| tr4| }t|dd}|dur#|S t|dddu r-dS |j}t|S | }t|S )zGet a "loader" object for module_or_name
Returns None if the module cannot be found or imported.
If the named module is not already imported, its containing package
(if any) is imported, in order to establish the package __path__.
N
__loader____spec__)r3 r4 r: r r2 rj r )Zmodule_or_namemoduler rd r r r r s
r c C s| | drd| }t|ztj| }W n ttttfy4 } zd}t|| t |||d}~ww |dur<|j
S dS )zFind a "loader" object for fullname
This is a backwards compatibility wrapper around
importlib.util.find_spec that converts most failures to ImportError
and only returns the loader rather than the full spec
r- r z,Error while finding loader for {!r} ({}: {})N) r r r0 r r r r TypeErrorr< typer )rd r r Zexr r r r s
r c C s t | ts| S |d }| dd } |d\}}}|r1ztj| j}W n ttfy0 | Y S w tj}|D ]}t |t s>q6t
|}|durvg } t |dr\| |}
|
dur[|
j
pZg } n t |drh||\}} | D ] } | | vru| | qjtj||} tj| rzt| }
W n ty } ztjd| |f W Y d}~q6d}~ww |
|
D ]}|d}|r|drq| | qW d n1 sw Y q6| S ) a Extend a package's path.
Intended use is to place the following code in a package's __init__.py:
from pkgutil import extend_path
__path__ = extend_path(__path__, __name__)
This will add to the package's __path__ all subdirectories of
directories on sys.path named after the package. This is useful
if one wants to distribute different parts of a single logical
package as multiple directories.
It also looks for *.pkg files beginning where * matches the name
argument. This feature is similar to *.pth files (see site.py),
except that it doesn't special-case lines starting with 'import'.
A *.pkg file is trusted at face value: apart from checking for
duplicates, all entries found in a *.pkg file are added to the
path, regardless of whether they are exist the filesystem. (This
is a feature.)
If the input path is not a list (as is the case for frozen
packages) it is returned unchanged. The input path is not
modified; an extended copy is returned. Items are only appended
to the copy at the end.
It is assumed that sys.path is a sequence. Items of sys.path that
are not (unicode or 8-bit) strings referring to existing
directories are ignored. Unicode items of sys.path that cause
errors when used as filenames may cause this function to raise an
exception (in line with os.path.isdir() behavior).
z.pkgNr- r r zCan't open %s: %s
#)r: listr r3 r4 r) r r r5 r; r rA r submodule_search_locationsr appendrG rN isfilers rK stderrwriterstripr )r5 r Z sname_pkgZparent_package_Z
final_nameZ search_pathdirr portionsr ZportionZpkgfiler r liner r r r sb
!
r c C s t j| }|du r dS |j}|du st|dsdS tj| p%t j |}|du s/t|ds1dS |
d}| dt j
|j t j
j| }||S )af Get a resource from a package.
This is a wrapper round the PEP 302 loader get_data API. The package
argument should be the name of a package, in standard module format
(foo.bar). The resource argument should be in the form of a relative
filename, using '/' as the path separator. The parent directory name '..'
is not allowed, and nor is a rooted name (starting with a '/').
The function returns a binary string, which is the contents of the
specified resource.
For packages located in the filesystem, which have already been imported,
this is the rough equivalent of
d = os.path.dirname(sys.modules[package].__file__)
data = open(os.path.join(d, resource), 'rb').read()
If the package cannot be located or loaded, or it uses a PEP 302 loader
which does not support get_data(), then None is returned.
Nr __file__/r )r r r r rA r3 r4 get
_bootstrap_loadrb insertrG r5 dirnamer rN r )packageZresourcer r rq partsZ
resource_namer r r r W s
r c C s t du rddl}d}|d| d| d|ja t | }|s&td| | }|drEt |d }|d
}|rB|
d ng }n6|
d }| d}t |}|r{|d }| d | } zt | }| d | }W n t yx Y nw |sV|}
|D ]}t
|
|}
q|
S ) a
Resolve a name to an object.
It is expected that `name` will be a string in one of the following
formats, where W is shorthand for a valid Python identifier and dot stands
for a literal period in these pseudo-regexes:
W(.W)*
W(.W)*:(W(.W)*)?
The first form is intended for backward compatibility only. It assumes that
some part of the dotted name is a package, and the rest is an object
somewhere within that package, possibly nested inside other objects.
Because the place where the package stops and the object hierarchy starts
can't be inferred by inspection, repeated attempts to import must be done
with this form.
In the second form, the caller makes the division point clear through the
provision of a single colon: the dotted name to the left of the colon is a
package to be imported, and the dotted name to the right is the object
hierarchy within that package. Only one import is needed in this form. If
it ends with the colon, then a module object is returned.
The function will return an object (which might be a module), or raise one
of the following exceptions:
ValueError - if `name` isn't in a recognised format
ImportError - if an import failed when it shouldn't have
AttributeError - if a failure occurred when traversing the object hierarchy
within the imported package to get to the desired object.
Nr z(?!\d)(\w+)(\.(?!\d)(\w+))*z ^(?Pz)(?P:(?Pz)?)?$zinvalid format: Zclnr objr- )
_NAME_PATTERNrer UNICODEmatchr< groupdictr r r\ rb popr0 r2 ) r r Z dotted_wordsr' Zgdrq r rQ r& sresultr r r resolve_name sD !
r )Nr% N)Nr% ri ))rm collectionsr functoolsr Z
simplegenericr importlib.utilimportlib.machineryrG Zos.pathr3 typesr rX __all__r r r r r
r> rT register machinery
FileFinderr] r r
r r r r0 r r r r r r r r r r r r sV
9
(Kd
^+