ž
¦ÿ f¥# c @ s¬ d Z d d l Z d d l m Z d d l m Z d d d d g Z Gd d „ d e ƒ Z Gd
d „ d e ƒ Z d d „ Z
Gd
d „ d e ƒ Z Gd d „ d e ƒ Z d S( u4 Utilities for with-statement contexts. See PEP 343.i N( u deque( u wrapsu contextmanageru closingu ContextDecoratoru ExitStackc B s2 | Ee Z d Z d Z d d „ Z d d „ Z d S( u ContextDecoratoruJ A base class or mixin that enables context managers to work as decorators.c C s | S( u6 Return 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.
( ( u self( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu _recreate_cm
s
u ContextDecorator._recreate_cmc s% t ˆ ƒ ‡ ‡ f d d † ƒ } | S( Nc
s$ ˆ j ƒ ˆ | | Ž SWd QXd S( N( u _recreate_cm( u argsu kwds( u funcu self( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu inner s
u( ContextDecorator.__call__..inner( u wraps( u selfu funcu inner( ( u funcu selfu/ /opt/alt/python33/lib64/python3.3/contextlib.pyu __call__ s !u ContextDecorator.__call__N( u __name__u
__module__u __qualname__u __doc__u _recreate_cmu __call__( u
__locals__( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu ContextDecorator
s c B sJ | Ee Z d Z d Z d d „ Z d d „ Z d d „ Z d d „ Z d
S( u _GeneratorContextManageru% Helper for @contextmanager decorator.c O s3 | | | Ž | _ | | | | _ | _ | _ d S( N( u genu funcu argsu kwds( u selfu funcu argsu kwds( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu __init__$ s u! _GeneratorContextManager.__init__c C s | j | j | j | j Ž S( N( u __class__u funcu argsu kwds( u self( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu _recreate_cm( s u% _GeneratorContextManager._recreate_cmc C s6 y t | j ƒ SWn t k
r1 t d ƒ ‚ Yn Xd S( Nu generator didn't yield( u nextu genu
StopIterationu RuntimeError( u self( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu __enter__. s
u" _GeneratorContextManager.__enter__c C sÜ | d k rE y t | j ƒ Wn t k
r5 d SYqØ Xt d ƒ ‚ n“ | d k r] | ƒ } n y& | j j | | | ƒ t d ƒ ‚ WnR t k
r´ } z | | k SWYd d } ~ Xn$ t j ƒ d | k rÓ ‚ n Yn Xd S( Nu generator didn't stopu# generator didn't stop after throw()i ( u Noneu nextu genu
StopIterationu RuntimeErroru throwu sysu exc_info( u selfu typeu valueu tracebacku exc( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu __exit__4 s
u! _GeneratorContextManager.__exit__N( u __name__u
__module__u __qualname__u __doc__u __init__u _recreate_cmu __enter__u __exit__( u
__locals__( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu _GeneratorContextManager! s
u _GeneratorContextManagerc s" t ˆ ƒ ‡ f d d † ƒ } | S( uÜ @contextmanager decorator.
Typical usage:
@contextmanager
def some_generator():
try:
yield
finally:
This makes this:
with some_generator() as :
equivalent to this:
try:
=
finally:
c s t ˆ | | Ž S( N( u _GeneratorContextManager( u argsu kwds( u func( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu helperq s u contextmanager..helper( u wraps( u funcu helper( ( u funcu/ /opt/alt/python33/lib64/python3.3/contextlib.pyu contextmanagerU s c B s> | Ee Z d Z d Z d d „ Z d d „ Z d d „ Z d S( u closingu2 Context to automatically close something at the end of a block.
Code like this:
with closing(.open()) as f:
is equivalent to this:
f = .open()
try:
finally:
f.close()
c C s
| | _ d S( N( u thing( u selfu thing( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu __init__ˆ s u closing.__init__c C s | j S( N( u thing( u self( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu __enter__Š s u closing.__enter__c G s | j j ƒ d S( N( u thingu close( u selfu exc_info( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu __exit__Œ s u closing.__exit__N( u __name__u
__module__u __qualname__u __doc__u __init__u __enter__u __exit__( u
__locals__( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu closingw s c B s† | Ee Z d Z d Z d d „ Z d d „ Z d d „ Z d d „ Z d
d „ Z d d
„ Z d d „ Z
d d „ Z d d „ Z d S( u ExitStacku‹ Context 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
c C s t ƒ | _ d S( N( u dequeu _exit_callbacks( u self( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu __init__ s u ExitStack.__init__c C s+ t | ƒ ƒ } | j | _ t ƒ | _ | S( u? Preserve the context stack by transferring it to a new instance( u typeu _exit_callbacksu deque( u selfu new_stack( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu pop_all s u ExitStack.pop_allc s/ ‡ ‡ f d d † } ˆ | _ | j | ƒ d S( u: Helper to correctly register callbacks to __exit__ methodsc s
ˆ ˆ | Œ S( N( ( u exc_details( u cmu cm_exit( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu
_exit_wrapper© s u. ExitStack._push_cm_exit.._exit_wrapperN( u __self__u push( u selfu cmu cm_exitu
_exit_wrapper( ( u cmu cm_exitu/ /opt/alt/python33/lib64/python3.3/contextlib.pyu
_push_cm_exit§ s u ExitStack._push_cm_exitc C sR t | ƒ } y
| j } Wn" t k
r= | j j | ƒ Yn X| j | | ƒ | S( u Registers a callback with the standard __exit__ method signature
Can suppress exceptions the same way __exit__ methods can.
Also accepts any object with an __exit__ method (registering a call
to the method instead of the object itself)
( u typeu __exit__u AttributeErroru _exit_callbacksu appendu
_push_cm_exit( u selfu exitu _cb_typeu exit_method( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu push® s
u ExitStack.pushc s2 ‡ ‡ ‡ f d d † } ˆ | _ | j | ƒ ˆ S( u\ Registers an arbitrary callback and arguments.
Cannot suppress exceptions.
c s ˆ ˆ ˆ Ž d S( N( ( u exc_typeu excu tb( u argsu callbacku kwds( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu
_exit_wrapperÇ s u) ExitStack.callback.._exit_wrapper( u __wrapped__u push( u selfu callbacku argsu kwdsu
_exit_wrapper( ( u argsu callbacku kwdsu/ /opt/alt/python33/lib64/python3.3/contextlib.pyu callback s
u ExitStack.callbackc C s8 t | ƒ } | j } | j | ƒ } | j | | ƒ | S( uª Enters the supplied context manager
If successful, also pushes its __exit__ method as a callback and
returns the result of the __enter__ method.
( u typeu __exit__u __enter__u
_push_cm_exit( u selfu cmu _cm_typeu _exitu result( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu
enter_contextÏ s
u ExitStack.enter_contextc C s | j d d d ƒ d S( u$ Immediately unwind the context stackN( u __exit__u None( u self( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu closeÜ s u ExitStack.closec C s | S( N( ( u self( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu __enter__à s u ExitStack.__enter__c s
| d d k } t j ƒ d ‰ ‡ f d d † } d } d } xy | j r¹ | j j ƒ } y% | | Œ r} d } d } d } n WqA t j ƒ } | | d | d ƒ d } | } YqA XqA W| ry | d j } | d ‚ Wqt k
rÿ | | d _ ‚ YqXn | o | S( Ni i c sN x> | j } | | k r d S| d k s4 | ˆ k r8 Pn | } q | | _ d S( N( u __context__u None( u new_excu old_excu exc_context( u frame_exc( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu _fix_exception_contexté s u2 ExitStack.__exit__.._fix_exception_contextFT( NNN( u Noneu sysu exc_infou Falseu _exit_callbacksu popu Trueu __context__u
BaseException( u selfu exc_detailsu received_excu _fix_exception_contextu suppressed_excu
pending_raiseu cbu new_exc_detailsu fixed_ctx( ( u frame_excu/ /opt/alt/python33/lib64/python3.3/contextlib.pyu __exit__ã s2
u ExitStack.__exit__N(
u __name__u
__module__u __qualname__u __doc__u __init__u pop_allu
_push_cm_exitu pushu callbacku
enter_contextu closeu __enter__u __exit__( u
__locals__( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu ExitStack‘ s
(
u __doc__u sysu collectionsu dequeu functoolsu wrapsu __all__u objectu ContextDecoratoru _GeneratorContextManageru contextmanageru closingu ExitStack( ( ( u/ /opt/alt/python33/lib64/python3.3/contextlib.pyu s 4 "