%PDF- %PDF-
Mini Shell

Mini Shell

Direktori : /usr/local/lib/python3.8/__pycache__/
Upload File :
Create Path :
Current File : //usr/local/lib/python3.8/__pycache__/contextlib.cpython-38.pyc

U

naa@sjdZddlZddlZddlZddlmZddlmZddlm	Z	dddd	d
ddd
ddddgZ
Gdd
d
ejZGdddejZ
Gdd
d
eZGdddZGdddeeeZGdddee
ZddZddZGdddeZGdddeZGd ddeZGd!ddeZGd"ddeZGd#d$d$ZGd%ddeeZGd&ddee
ZGd'd	d	eZdS)(z4Utilities for with-statement contexts.  See PEP 343.N)dequewraps
MethodTypeasynccontextmanagercontextmanagerclosingnullcontextAbstractContextManagerAbstractAsyncContextManagerAsyncExitStackContextDecorator	ExitStackredirect_stdoutredirect_stderrsuppressc@s2eZdZdZddZejddZeddZ	dS)	rz,An abstract base class for context managers.cCs|Sz0Return `self` upon entering the runtime context.selfrr&/usr/local/lib/python3.8/contextlib.py	__enter__sz AbstractContextManager.__enter__cCsdSz9Raise any exception triggered within the runtime context.Nrrexc_type	exc_value	tracebackrrr__exit__szAbstractContextManager.__exit__cCs|tkrt|ddStS)Nrr)r_collections_abc_check_methodsNotImplementedclsCrrr__subclasshook__sz'AbstractContextManager.__subclasshook__N)
__name__
__module____qualname____doc__rabcabstractmethodrclassmethodr%rrrrrs
c@s2eZdZdZddZejddZeddZ	dS)	rz9An abstract base class for asynchronous context managers.cs|Srrrrrr
__aenter__'sz&AbstractAsyncContextManager.__aenter__csdSrrrrrr	__aexit__+sz%AbstractAsyncContextManager.__aexit__cCs|tkrt|ddStS)Nr-r.)rrr r!r"rrrr%0s
z,AbstractAsyncContextManager.__subclasshook__N)
r&r'r(r)r-r*r+r.r,r%rrrrr#s
c@s eZdZdZddZddZdS)rzJA base class or mixin that enables context managers to work as decorators.cCs|S)a6Return a recreated instance of self.

        Allows an otherwise one-shot context manager like
        _GeneratorContextManager to support use as
        a decorator via implicit recreation.

        This is a private interface just for _GeneratorContextManager.
        See issue #11647 for details.
        rrrrr_recreate_cm;s
zContextDecorator._recreate_cmcstfdd}|S)Nc
s*||W5QRSQRXdSN)r/argskwdsfuncrrrinnerHs
z(ContextDecorator.__call__.<locals>.innerr)rr5r6rr4r__call__GszContextDecorator.__call__N)r&r'r(r)r/r7rrrrr8sc@seZdZdZddZdS)_GeneratorContextManagerBasezBShared functionality for @contextmanager and @asynccontextmanager.cCsJ||||_||||_|_|_t|dd}|dkr@t|j}||_dS)Nr))genr5r2r3getattrtyper))rr5r2r3docrrr__init__Rs
z%_GeneratorContextManagerBase.__init__N)r&r'r(r)r=rrrrr8Osr8c@s(eZdZdZddZddZddZdS)	_GeneratorContextManagerz%Helper for @contextmanager decorator.cCs||j|j|jSr0)	__class__r5r2r3rrrrr/fsz%_GeneratorContextManager._recreate_cmcCs<|`|`|`zt|jWStk
r6tddYnXdSNzgenerator didn't yield)r2r3r5nextr9
StopIterationRuntimeErrorrrrrrls
z"_GeneratorContextManager.__enter__c
Cs|dkr8zt|jWntk
r,YdSXtdn|dkrF|}z|j|||Wntk
r}z||k	WYSd}~XYnttk
r}z4||krWY&dS|tkr|j|krWY
dSW5d}~XYn$td|krYdSYnXtddS)NFgenerator didn't stopz#generator didn't stop after throw())rAr9rBrCthrow	__cause__sysexc_info)rr;valuerexcrrrrus.


z!_GeneratorContextManager.__exit__N)r&r'r(r)r/rrrrrrr>as	r>c@s eZdZdZddZddZdS)_AsyncGeneratorContextManagerz Helper for @asynccontextmanager.cs6z|jIdHWStk
r0tddYnXdSr@)r9	__anext__StopAsyncIterationrCrrrrr-sz(_AsyncGeneratorContextManager.__aenter__c
s&|dkr>z|jIdHWntk
r2YdSXtdn|dkrL|}z"|j|||IdHtdWntk
r}z||k	WYSd}~XYntk
r}z:||krWY,dSt|ttfr|j|krWY
dSW5d}~XYn0tk
r }z||k	rW5d}~XYnXdS)NrDz$generator didn't stop after athrow()F)	r9rMrNrCathrow
isinstancerBrG
BaseException)rtyprJrrKrrrr.s.




z'_AsyncGeneratorContextManager.__aexit__N)r&r'r(r)r-r.rrrrrLsrLcstfdd}|S)a@contextmanager decorator.

    Typical usage:

        @contextmanager
        def some_generator(<arguments>):
            <setup>
            try:
                yield <value>
            finally:
                <cleanup>

    This makes this:

        with some_generator(<arguments>) as <variable>:
            <body>

    equivalent to this:

        <setup>
        try:
            <variable> = <value>
            <body>
        finally:
            <cleanup>
    cst||Sr0)r>r1r5rrhelperszcontextmanager.<locals>.helperrr5rTrrSrrscstfdd}|S)a@asynccontextmanager decorator.

    Typical usage:

        @asynccontextmanager
        async def some_async_generator(<arguments>):
            <setup>
            try:
                yield <value>
            finally:
                <cleanup>

    This makes this:

        async with some_async_generator(<arguments>) as <variable>:
            <body>

    equivalent to this:

        <setup>
        try:
            <variable> = <value>
            <body>
        finally:
            <cleanup>
    cst||Sr0)rLr1rSrrrTsz#asynccontextmanager.<locals>.helperrrUrrSrrsc@s(eZdZdZddZddZddZdS)	r	a2Context to automatically close something at the end of a block.

    Code like this:

        with closing(<module>.open(<arguments>)) as f:
            <block>

    is equivalent to this:

        f = <module>.open(<arguments>)
        try:
            <block>
        finally:
            f.close()

    cCs
||_dSr0thing)rrWrrrr=&szclosing.__init__cCs|jSr0rVrrrrr(szclosing.__enter__cGs|jdSr0)rWclose)rrIrrrr*szclosing.__exit__Nr&r'r(r)r=rrrrrrr	sc@s(eZdZdZddZddZddZdS)_RedirectStreamNcCs||_g|_dSr0)_new_target_old_targets)r
new_targetrrrr=2sz_RedirectStream.__init__cCs*|jtt|jtt|j|j|jSr0)r\appendr:rH_streamsetattrr[rrrrr7sz_RedirectStream.__enter__cCstt|j|jdSr0)r`rHr_r\poprexctypeexcinstexctbrrrr<sz_RedirectStream.__exit__)r&r'r(r_r=rrrrrrrZ.srZc@seZdZdZdZdS)raAContext manager for temporarily redirecting stdout to another file.

        # How to send help() to stderr
        with redirect_stdout(sys.stderr):
            help(dir)

        # How to write help() to a file
        with open('help.txt', 'w') as f:
            with redirect_stdout(f):
                help(pow)
    stdoutNr&r'r(r)r_rrrrr@sc@seZdZdZdZdS)rzCContext manager for temporarily redirecting stderr to another file.stderrNrgrrrrrPsc@s(eZdZdZddZddZddZdS)	ra?Context manager to suppress specified exceptions

    After the exception is suppressed, execution proceeds with the next
    statement following the with statement.

         with suppress(FileNotFoundError):
             os.remove(somefile)
         # Execution still resumes here if the file was already removed
    cGs
||_dSr0)_exceptions)r
exceptionsrrrr=aszsuppress.__init__cCsdSr0rrrrrrdszsuppress.__enter__cCs|dk	ot||jSr0)
issubclassrirbrrrrgs
zsuppress.__exit__NrYrrrrrVs
c@sheZdZdZeddZeddZddZdd	Zd
dZ	dd
Z
ddZde_ddZ
dddZdS)_BaseExitStackz.A base class for ExitStack and AsyncExitStack.cCs
t||Sr0rcmcm_exitrrr_create_exit_wrapperwsz#_BaseExitStack._create_exit_wrappercsfdd}|S)NcsdSr0rrrKtbr2callbackr3rr
_exit_wrapper}sz8_BaseExitStack._create_cb_wrapper.<locals>._exit_wrapperrrtr2r3rurrsr_create_cb_wrapper{sz!_BaseExitStack._create_cb_wrappercCst|_dSr0)r_exit_callbacksrrrrr=sz_BaseExitStack.__init__cCst|}|j|_t|_|S)z@Preserve the context stack by transferring it to a new instance.)r;rxr)r	new_stackrrrpop_alls
z_BaseExitStack.pop_allcCsBt|}z
|j}Wntk
r0||YnX||||S)aRegisters a callback with the standard __exit__ method signature.

        Can suppress exceptions the same way __exit__ method can.
        Also accepts any object with an __exit__ method (registering a call
        to the method instead of the object itself).
        )r;rAttributeError_push_exit_callback
_push_cm_exitrexit_cb_typeexit_methodrrrpushs	
z_BaseExitStack.pushcCs(t|}|j}||}||||S)zEnters the supplied context manager.

        If successful, also pushes its __exit__ method as a callback and
        returns the result of the __enter__ method.
        )r;rrr}rrn_cm_type_exitresultrrr
enter_contexts

z_BaseExitStack.enter_contextcOst|dkr|^}}}nV|s&tdnHd|krZ|d}|^}}ddl}|jdtddntdt|d	|j|f||}||_|||S)
z\Registers an arbitrary callback and arguments.

        Cannot suppress exceptions.
        zBdescriptor 'callback' of '_BaseExitStack' object needs an argumentrtrN4Passing 'callback' as keyword argument is deprecated
stacklevelz8callback expected at least 1 positional argument, got %drE)	len	TypeErrorrawarningswarnDeprecationWarningrw__wrapped__r|r2r3rrtrrurrrrts&



z_BaseExitStack.callback#($self, callback, /, *args, **kwds)cCs|||}||ddS)z;Helper to correctly register callbacks to __exit__ methods.TN)rpr|rrnrorurrrr}sz_BaseExitStack._push_cm_exitTcCs|j||fdSr0)rxr^)rrtis_syncrrrr|sz"_BaseExitStack._push_exit_callbackN)T)r&r'r(r)staticmethodrprwr=rzrrrt__text_signature__r}r|rrrrrlts

rlc@s(eZdZdZddZddZddZdS)	raContext manager for dynamic management of a stack of exit callbacks.

    For example:
        with ExitStack() as stack:
            files = [stack.enter_context(open(fname)) for fname in filenames]
            # All opened files will automatically be closed at the end of
            # the with statement, even if attempts to open files later
            # in the list raise an exception.
    cCs|Sr0rrrrrrszExitStack.__enter__c
s|ddk	}tdfdd}d}d}|jr|j\}}|sHtz||r^d}d}d}Wq,t}||d|dd}|}Yq,Xq,|rz|dj}	|dWn tk
r|	|d_YnX|o|S)NrrEcs4|j}||krdS|dks*|kr$q*|}q||_dSr0__context__new_excold_excexc_context	frame_excrr_fix_exception_contextsz2ExitStack.__exit__.<locals>._fix_exception_contextFTNNN)rHrIrxraAssertionErrorrrQ)
rexc_detailsreceived_excrsuppressed_exc
pending_raisercbnew_exc_details	fixed_ctxrrrrs4

zExitStack.__exit__cCs|ddddSz%Immediately unwind the context stack.N)rrrrrrXszExitStack.closeN)r&r'r(r)rrrXrrrrrs
1c@sfeZdZdZeddZeddZddZdd	Zd
dZ	de	_
d
dZddZddZ
ddZdS)r
aAsync context manager for dynamic management of a stack of exit
    callbacks.

    For example:
        async with AsyncExitStack() as stack:
            connections = [await stack.enter_async_context(get_connection())
                for i in range(5)]
            # All opened connections will automatically be released at the
            # end of the async with statement, even if attempts to open a
            # connection later in the list raise an exception.
    cCs
t||Sr0rrmrrr_create_async_exit_wrapper&sz)AsyncExitStack._create_async_exit_wrappercsfdd}|S)NcsIdHdSr0rrqrsrrru,sz>AsyncExitStack._create_async_cb_wrapper.<locals>._exit_wrapperrrvrrsr_create_async_cb_wrapper*sz'AsyncExitStack._create_async_cb_wrappercs.t|}|j}||IdH}||||S)zEnters the supplied async context manager.

        If successful, also pushes its __aexit__ method as a callback and
        returns the result of the __aenter__ method.
        N)r;r.r-_push_async_cm_exitrrrrenter_async_context0s
z"AsyncExitStack.enter_async_contextcCsDt|}z
|j}Wn tk
r2||dYnX||||S)a#Registers a coroutine function with the standard __aexit__ method
        signature.

        Can suppress exceptions the same way __aexit__ method can.
        Also accepts any object with an __aexit__ method (registering a call
        to the method instead of the object itself).
        F)r;r.r{r|rr~rrrpush_async_exit<s
zAsyncExitStack.push_async_exitcOst|dkr|^}}}nV|s&tdnHd|krZ|d}|^}}ddl}|jdtddntdt|d	|j|f||}||_||d
|S)zfRegisters an arbitrary coroutine function and arguments.

        Cannot suppress exceptions.
        rzMdescriptor 'push_async_callback' of 'AsyncExitStack' object needs an argumentrtrNrrzCpush_async_callback expected at least 1 positional argument, got %drEF)	rrrarrrrrr|rrrrpush_async_callbackNs&


z"AsyncExitStack.push_async_callbackrcs|dddIdHdSr)r.rrrraclosekszAsyncExitStack.aclosecCs|||}||ddS)zLHelper to correctly register coroutine function to __aexit__
        method.FN)rr|rrrrrosz"AsyncExitStack._push_async_cm_exitcs|Sr0rrrrrr-uszAsyncExitStack.__aenter__cs|ddk	}tdfdd}d}d}|jr|j\}}z0|rP||}n||IdH}|rnd}d}d}Wq,t}	||	d|dd}|	}Yq,Xq,|rz|dj}
|dWn tk
r|
|d_YnX|o|S)NrrEcs4|j}||krdS|dks*|kr$q*|}q||_dSr0rrrrrr~sz8AsyncExitStack.__aexit__.<locals>._fix_exception_contextFTr)rHrIrxrarrQ)rrrrrrrrcb_suppressrrrrrr.xs8


zAsyncExitStack.__aexit__N)r&r'r(r)rrrrrrrrrr-r.rrrrr
s

c@s*eZdZdZd	ddZddZddZdS)
r
aOContext manager that does no additional processing.

    Used as a stand-in for a normal context manager, when a particular
    block of code is only sometimes used with a normal context manager:

    cm = optional_cm if condition else nullcontext()
    with cm:
        # Perform operation, using optional_cm if condition is True
    NcCs
||_dSr0enter_result)rrrrrr=sznullcontext.__init__cCs|jSr0rrrrrrsznullcontext.__enter__cGsdSr0r)rexcinforrrrsznullcontext.__exit__)NrYrrrrr
s

)r)r*rHrcollectionsr	functoolsrtypesr__all__ABCrrobjectrr8r>rLrrr	rZrrrrlrr
r
rrrr<module>sND.!!`E

Zerion Mini Shell 1.0