Current File : //proc/227033/root/lib64/python2.7/site-packages/zmq/eventloop/minitornado/util.pyc
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� � YZ d � Z d S( s� Miscellaneous utility functions and classes.
This module is used internally by Tornado. It is not necessarily expected
that the functions and classes defined here will be useful to other
applications, but they are documented here in case they are.
The one public-facing part of this module is the `Configurable` class
and its `~Configurable.configure` method, which becomes a part of the
interface of its subclasses, including `.AsyncHTTPClient`, `.IOLoop`,
and `.Resolver`.
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r� t d | d � � n Xd S( s Imports an object by name.
import_object('x') is equivalent to 'import x'.
import_object('x.y.z') is equivalent to 'from x.y import z'.
>>> import tornado.escape
>>> import_object('tornado.escape') is tornado.escape
True
>>> import_object('tornado.escape.utf8') is tornado.escape.utf8
True
>>> import_object('tornado') is tornado
True
>>> import_object('tornado.missing_module')
Traceback (most recent call last):
...
ImportError: No module named missing_module
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def raise_exc_info(exc_info):
raise exc_info[1].with_traceback(exc_info[2])
def exec_in(code, glob, loc=None):
if isinstance(code, str):
code = compile(code, '<string>', 'exec', dont_inherit=True)
exec(code, glob, loc)
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def raise_exc_info(exc_info):
raise exc_info[0], exc_info[1], exc_info[2]
def exec_in(code, glob, loc=None):
if isinstance(code, basestring):
# exec(string) inherits the caller's future imports; compile
# the string first to prevent that.
code = compile(code, '<string>', 'exec', dont_inherit=True)
exec code in glob, loc
c C� s2 t | d � r | j S| j r* | j d Sd Sd S( sL Provides the errno from an Exception object.
There are cases that the errno attribute was not set so we pull
the errno out of the args but if someone instantiates an Exception
without any args you will get a tuple error. So this function
abstracts all that behavior to give you a safe way to get the
errno.
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s� Base class for configurable interfaces.
A configurable interface is an (abstract) class whose constructor
acts as a factory function for one of its implementation subclasses.
The implementation subclass as well as optional keyword arguments to
its initializer can be set globally at runtime with `configure`.
By using the constructor as the factory method, the interface
looks like a normal class, `isinstance` works as usual, etc. This
pattern is most useful when the choice of implementation is likely
to be a global decision (e.g. when `~select.epoll` is available,
always use it instead of `~select.select`), or when a
previously-monolithic class has been split into specialized
subclasses.
Configurable subclasses must define the class methods
`configurable_base` and `configurable_default`, and use the instance
method `initialize` instead of ``__init__``.
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This will normally return the class in which it is defined.
(which is *not* necessarily the same as the cls classmethod parameter).
N( t NotImplementedError( R' ( ( sD /usr/lib64/python2.7/site-packages/zmq/eventloop/minitornado/util.pyR � s c C� s
t � � d S( sB Returns the implementation class to be used if none is configured.N( R- ( R' ( ( sD /usr/lib64/python2.7/site-packages/zmq/eventloop/minitornado/util.pyt configurable_default� s c C� s d S( s� Initialize a `Configurable` subclass instance.
Configurable classes should use `initialize` instead of ``__init__``.
.. versionchanged:: 4.2
Now accepts positional arguments in addition to keyword arguments.
N( ( t self( ( sD /usr/lib64/python2.7/site-packages/zmq/eventloop/minitornado/util.pyR& � s c K� su | j � } t | t t f � r0 t | � } n | d k r_ t | | � r_ t d | � � n | | _ | | _ d S( s� Sets the class to use when the base class is instantiated.
Keyword arguments will be saved and added to the arguments passed
to the constructor. This can be used to set global defaults for
some parameters.
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ValueErrort _Configurable__impl_classR" ( R' R+ R( R) ( ( sD /usr/lib64/python2.7/site-packages/zmq/eventloop/minitornado/util.pyt configure� s c C� s4 | j � } | j d k r- | j � | _ n | j S( s' Returns the currently configured class.N( R R3 R R. ( R' R) ( ( sD /usr/lib64/python2.7/site-packages/zmq/eventloop/minitornado/util.pyR! � s c C� s | j � } | j | j f S( N( R R3 R" ( R' R) ( ( sD /usr/lib64/python2.7/site-packages/zmq/eventloop/minitornado/util.pyt _save_configuration� s c C� s* | j � } | d | _ | d | _ d S( Ni i ( R R3 R" ( R' t savedR) ( ( sD /usr/lib64/python2.7/site-packages/zmq/eventloop/minitornado/util.pyt _restore_configuration� s
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__module__t __doc__R R3 R" R% t classmethodR R. R& R4 R! R5 R7 ( ( ( sD /usr/lib64/python2.7/site-packages/zmq/eventloop/minitornado/util.pyR s s c C� s+ | j | j | j d d d t d � S( s< Equivalent to td.total_seconds() (introduced in python 2.7).i i i
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