def decorator(target):
"""A signature-matching decorator factory."""
def decorate(fn):
if not inspect.isfunction(fn):
raise Exception("not a decoratable function")
spec = compat.inspect_getfullargspec(fn)
names = tuple(spec[0]) + spec[1:3] + (fn.__name__,)
targ_name, fn_name = _unique_symbols(names, 'target', 'fn')
metadata = dict(target=targ_name, fn=fn_name)
metadata.update(format_argspec_plus(spec, grouped=False))
metadata['name'] = fn.__name__
code = """\
def %(name)s(%(args)s):
return %(target)s(%(fn)s, %(apply_kw)s)
""" % metadata
decorated = _exec_code_in_env(code,
{targ_name: target, fn_name: fn},
fn.__name__)
decorated.__defaults__ = getattr(fn, 'im_func', fn).__defaults__
decorated.__wrapped__ = fn
return update_wrapper(decorated, fn)
return update_wrapper(decorate, target)
python类update_wrapper()的实例源码
def memoized_instancemethod(fn):
"""Decorate a method memoize its return value.
Best applied to no-arg methods: memoization is not sensitive to
argument values, and will always return the same value even when
called with different arguments.
"""
def oneshot(self, *args, **kw):
result = fn(self, *args, **kw)
memo = lambda *a, **kw: result
memo.__name__ = fn.__name__
memo.__doc__ = fn.__doc__
self.__dict__[fn.__name__] = memo
return result
return update_wrapper(oneshot, fn)
def application(cls, f):
"""Decorate a function as responder that accepts the request as first
argument. This works like the :func:`responder` decorator but the
function is passed the request object as first argument and the
request object will be closed automatically::
@Request.application
def my_wsgi_app(request):
return Response('Hello World!')
:param f: the WSGI callable to decorate
:return: a new WSGI callable
"""
#: return a callable that wraps the -2nd argument with the request
#: and calls the function with all the arguments up to that one and
#: the request. The return value is then called with the latest
#: two arguments. This makes it possible to use this decorator for
#: both methods and standalone WSGI functions.
def application(*args):
request = cls(args[-2])
with request:
return f(*args[:-2] + (request,))(*args[-2:])
return update_wrapper(application, f)
def application(cls, f):
"""Decorate a function as responder that accepts the request as first
argument. This works like the :func:`responder` decorator but the
function is passed the request object as first argument and the
request object will be closed automatically::
@Request.application
def my_wsgi_app(request):
return Response('Hello World!')
:param f: the WSGI callable to decorate
:return: a new WSGI callable
"""
#: return a callable that wraps the -2nd argument with the request
#: and calls the function with all the arguments up to that one and
#: the request. The return value is then called with the latest
#: two arguments. This makes it possible to use this decorator for
#: both methods and standalone WSGI functions.
def application(*args):
request = cls(args[-2])
with request:
return f(*args[:-2] + (request,))(*args[-2:])
return update_wrapper(application, f)
def _retry_on_deadlock(f):
"""Decorator to retry a DB API call if Deadlock was received."""
@functools.wraps(f)
def wrapped(*args, **kwargs):
while True:
try:
return f(*args, **kwargs)
except db_exc.DBDeadlock:
LOG.warning(_LW("Deadlock detected when running "
"'%(func_name)s': Retrying..."),
dict(func_name=f.__name__))
# Retry!
time.sleep(0.5)
continue
functools.update_wrapper(wrapped, f)
return wrapped
def get_urls(self):
from django.conf.urls import url
def wrap(view):
def wrapper(*args, **kwargs):
return self.admin_site.admin_view(view)(*args, **kwargs)
wrapper.model_admin = self
return update_wrapper(wrapper, view)
info = self.model._meta.app_label, self.model._meta.model_name
urlpatterns = [
url(r'^$', wrap(self.changelist_view), name='%s_%s_changelist' % info),
url(r'^add/$', wrap(self.add_view), name='%s_%s_add' % info),
url(r'^(.+)/history/$', wrap(self.history_view), name='%s_%s_history' % info),
url(r'^(.+)/delete/$', wrap(self.delete_view), name='%s_%s_delete' % info),
url(r'^(.+)/change/$', wrap(self.change_view), name='%s_%s_change' % info),
# For backwards compatibility (was the change url before 1.9)
url(r'^(.+)/$', wrap(RedirectView.as_view(
pattern_name='%s:%s_%s_change' % ((self.admin_site.name,) + info)
))),
]
return urlpatterns
def application(cls, f):
"""Decorate a function as responder that accepts the request as first
argument. This works like the :func:`responder` decorator but the
function is passed the request object as first argument and the
request object will be closed automatically::
@Request.application
def my_wsgi_app(request):
return Response('Hello World!')
:param f: the WSGI callable to decorate
:return: a new WSGI callable
"""
#: return a callable that wraps the -2nd argument with the request
#: and calls the function with all the arguments up to that one and
#: the request. The return value is then called with the latest
#: two arguments. This makes it possible to use this decorator for
#: both methods and standalone WSGI functions.
def application(*args):
request = cls(args[-2])
with request:
return f(*args[:-2] + (request,))(*args[-2:])
return update_wrapper(application, f)
def exhaust_stream(f):
"""Helper decorator for methods that exhausts the stream on return."""
def wrapper(self, stream, *args, **kwargs):
try:
return f(self, stream, *args, **kwargs)
finally:
exhaust = getattr(stream, 'exhaust', None)
if exhaust is not None:
exhaust()
else:
while 1:
chunk = stream.read(1024 * 64)
if not chunk:
break
return update_wrapper(wrapper, f)
def get_urls(self):
from django.conf.urls import url
def wrap(view):
def wrapper(*args, **kwargs):
return self.admin_site.admin_view(view)(*args, **kwargs)
wrapper.model_admin = self
return update_wrapper(wrapper, view)
info = self.model._meta.app_label, self.model._meta.model_name
urlpatterns = [
url(r'^$', wrap(self.changelist_view), name='%s_%s_changelist' % info),
url(r'^add/$', wrap(self.add_view), name='%s_%s_add' % info),
url(r'^(.+)/history/$', wrap(self.history_view), name='%s_%s_history' % info),
url(r'^(.+)/delete/$', wrap(self.delete_view), name='%s_%s_delete' % info),
url(r'^(.+)/change/$', wrap(self.change_view), name='%s_%s_change' % info),
# For backwards compatibility (was the change url before 1.9)
url(r'^(.+)/$', wrap(RedirectView.as_view(
pattern_name='%s:%s_%s_change' % ((self.admin_site.name,) + info)
))),
]
return urlpatterns
def get_urls(self):
urls = super(SentNotificationAdmin, self).get_urls()
opts = self.model._meta # pylint: disable=W0212
def wrap(view):
"""
Copied from super class
"""
def wrapper(*args, **kwargs):
"""
Copied from super class
"""
return self.admin_site.admin_view(view)(*args, **kwargs)
return update_wrapper(wrapper, view)
info = opts.app_label, opts.model_name
return [
url(r'^(.+)/resend/$', wrap(self.resend_view), name='%s_%s_resend' % info),
] + urls
def do(self, job_func, *args, **kwargs):
"""Specifies the job_func that should be called every time the
job runs.
Any additional arguments are passed on to job_func when
the job runs.
"""
self.job_func = functools.partial(job_func, *args, **kwargs)
try:
functools.update_wrapper(self.job_func, job_func)
except AttributeError:
# job_funcs already wrapped by functools.partial won't have
# __name__, __module__ or __doc__ and the update_wrapper()
# call will fail.
pass
self._schedule_next_run()
return self
def get_api_urls(self):
def wrap(view):
def wrapper(*args, **kwargs):
return self.admin_site.admin_view(view)(*args, **kwargs)
wrapper.model_admin = self
return update_wrapper(wrapper, view)
info = self.model._meta.app_label, self.model._meta.model_name
urlpatterns = [
url(r'^$',
wrap(self.admin_site.admin_view(self.dispatch)),
name='%s_%s_api_list' % info),
url(r'^(?P<pk>[-\d]+)/$',
wrap(self.admin_site.admin_view(self.dispatch)),
name='%s_%s_api_detail' % info),
url(r'^meta/$',
wrap(self.admin_site.admin_view(self.api_meta_view)),
name='%s_%s_api_meta' % info),
]
return urlpatterns
def application(cls, f):
"""Decorate a function as responder that accepts the request as first
argument. This works like the :func:`responder` decorator but the
function is passed the request object as first argument and the
request object will be closed automatically::
@Request.application
def my_wsgi_app(request):
return Response('Hello World!')
:param f: the WSGI callable to decorate
:return: a new WSGI callable
"""
#: return a callable that wraps the -2nd argument with the request
#: and calls the function with all the arguments up to that one and
#: the request. The return value is then called with the latest
#: two arguments. This makes it possible to use this decorator for
#: both methods and standalone WSGI functions.
def application(*args):
request = cls(args[-2])
with request:
return f(*args[:-2] + (request,))(*args[-2:])
return update_wrapper(application, f)
def exhaust_stream(f):
"""Helper decorator for methods that exhausts the stream on return."""
def wrapper(self, stream, *args, **kwargs):
try:
return f(self, stream, *args, **kwargs)
finally:
exhaust = getattr(stream, 'exhaust', None)
if exhaust is not None:
exhaust()
else:
while 1:
chunk = stream.read(1024 * 64)
if not chunk:
break
return update_wrapper(wrapper, f)
def application(cls, f):
"""Decorate a function as responder that accepts the request as first
argument. This works like the :func:`responder` decorator but the
function is passed the request object as first argument and the
request object will be closed automatically::
@Request.application
def my_wsgi_app(request):
return Response('Hello World!')
:param f: the WSGI callable to decorate
:return: a new WSGI callable
"""
#: return a callable that wraps the -2nd argument with the request
#: and calls the function with all the arguments up to that one and
#: the request. The return value is then called with the latest
#: two arguments. This makes it possible to use this decorator for
#: both methods and standalone WSGI functions.
def application(*args):
request = cls(args[-2])
with request:
return f(*args[:-2] + (request,))(*args[-2:])
return update_wrapper(application, f)
def exhaust_stream(f):
"""Helper decorator for methods that exhausts the stream on return."""
def wrapper(self, stream, *args, **kwargs):
try:
return f(self, stream, *args, **kwargs)
finally:
exhaust = getattr(stream, 'exhaust', None)
if exhaust is not None:
exhaust()
else:
while 1:
chunk = stream.read(1024 * 64)
if not chunk:
break
return update_wrapper(wrapper, f)
def exhaust_stream(f):
"""Helper decorator for methods that exhausts the stream on return."""
def wrapper(self, stream, *args, **kwargs):
try:
return f(self, stream, *args, **kwargs)
finally:
exhaust = getattr(stream, 'exhaust', None)
if exhaust is not None:
exhaust()
else:
while 1:
chunk = stream.read(1024 * 64)
if not chunk:
break
return update_wrapper(wrapper, f)
def decorator(target):
"""A signature-matching decorator factory."""
def decorate(fn):
if not inspect.isfunction(fn):
raise Exception("not a decoratable function")
spec = compat.inspect_getfullargspec(fn)
names = tuple(spec[0]) + spec[1:3] + (fn.__name__,)
targ_name, fn_name = _unique_symbols(names, 'target', 'fn')
metadata = dict(target=targ_name, fn=fn_name)
metadata.update(format_argspec_plus(spec, grouped=False))
metadata['name'] = fn.__name__
code = """\
def %(name)s(%(args)s):
return %(target)s(%(fn)s, %(apply_kw)s)
""" % metadata
decorated = _exec_code_in_env(code,
{targ_name: target, fn_name: fn},
fn.__name__)
decorated.__defaults__ = getattr(fn, 'im_func', fn).__defaults__
decorated.__wrapped__ = fn
return update_wrapper(decorated, fn)
return update_wrapper(decorate, target)
def memoized_instancemethod(fn):
"""Decorate a method memoize its return value.
Best applied to no-arg methods: memoization is not sensitive to
argument values, and will always return the same value even when
called with different arguments.
"""
def oneshot(self, *args, **kw):
result = fn(self, *args, **kw)
memo = lambda *a, **kw: result
memo.__name__ = fn.__name__
memo.__doc__ = fn.__doc__
self.__dict__[fn.__name__] = memo
return result
return update_wrapper(oneshot, fn)
def get_urls(self):
from django.conf.urls import url
def wrap(view):
def wrapper(*args, **kwargs):
return self.admin_site.admin_view(view)(*args, **kwargs)
wrapper.model_admin = self
return update_wrapper(wrapper, view)
info = self.model._meta.app_label, self.model._meta.model_name
urlpatterns = [
url(r'^$', wrap(self.changelist_view), name='%s_%s_changelist' % info),
url(r'^add/$', wrap(self.add_view), name='%s_%s_add' % info),
url(r'^(.+)/history/$', wrap(self.history_view), name='%s_%s_history' % info),
url(r'^(.+)/delete/$', wrap(self.delete_view), name='%s_%s_delete' % info),
url(r'^(.+)/change/$', wrap(self.change_view), name='%s_%s_change' % info),
# For backwards compatibility (was the change url before 1.9)
url(r'^(.+)/$', wrap(RedirectView.as_view(
pattern_name='%s:%s_%s_change' % ((self.admin_site.name,) + info)
))),
]
return urlpatterns
def application(cls, f):
"""Decorate a function as responder that accepts the request as first
argument. This works like the :func:`responder` decorator but the
function is passed the request object as first argument and the
request object will be closed automatically::
@Request.application
def my_wsgi_app(request):
return Response('Hello World!')
:param f: the WSGI callable to decorate
:return: a new WSGI callable
"""
#: return a callable that wraps the -2nd argument with the request
#: and calls the function with all the arguments up to that one and
#: the request. The return value is then called with the latest
#: two arguments. This makes it possible to use this decorator for
#: both methods and standalone WSGI functions.
def application(*args):
request = cls(args[-2])
with request:
return f(*args[:-2] + (request,))(*args[-2:])
return update_wrapper(application, f)
def exhaust_stream(f):
"""Helper decorator for methods that exhausts the stream on return."""
def wrapper(self, stream, *args, **kwargs):
try:
return f(self, stream, *args, **kwargs)
finally:
exhaust = getattr(stream, 'exhaust', None)
if exhaust is not None:
exhaust()
else:
while 1:
chunk = stream.read(1024 * 64)
if not chunk:
break
return update_wrapper(wrapper, f)
def application(cls, f):
"""Decorate a function as responder that accepts the request as first
argument. This works like the :func:`responder` decorator but the
function is passed the request object as first argument and the
request object will be closed automatically::
@Request.application
def my_wsgi_app(request):
return Response('Hello World!')
:param f: the WSGI callable to decorate
:return: a new WSGI callable
"""
#: return a callable that wraps the -2nd argument with the request
#: and calls the function with all the arguments up to that one and
#: the request. The return value is then called with the latest
#: two arguments. This makes it possible to use this decorator for
#: both methods and standalone WSGI functions.
def application(*args):
request = cls(args[-2])
with request:
return f(*args[:-2] + (request,))(*args[-2:])
return update_wrapper(application, f)
def application(cls, f):
"""Decorate a function as responder that accepts the request as first
argument. This works like the :func:`responder` decorator but the
function is passed the request object as first argument and the
request object will be closed automatically::
@Request.application
def my_wsgi_app(request):
return Response('Hello World!')
:param f: the WSGI callable to decorate
:return: a new WSGI callable
"""
#: return a callable that wraps the -2nd argument with the request
#: and calls the function with all the arguments up to that one and
#: the request. The return value is then called with the latest
#: two arguments. This makes it possible to use this decorator for
#: both methods and standalone WSGI functions.
def application(*args):
request = cls(args[-2])
with request:
return f(*args[:-2] + (request,))(*args[-2:])
return update_wrapper(application, f)
def get_urls(self):
"""
Add our own ``move`` view.
"""
def wrap(view):
def wrapper(*args, **kwargs):
return self.admin_site.admin_view(view)(*args, **kwargs)
wrapper.model_admin = self
return update_wrapper(wrapper, view)
info = self.model._meta.app_label, self.model._meta.model_name
return [
url(r'^(.+)/move/$', wrap(self.move_view),
name='%s_%s_move' % info),
] + super(TreeAdmin, self).get_urls()
def application(cls, f):
"""Decorate a function as responder that accepts the request as first
argument. This works like the :func:`responder` decorator but the
function is passed the request object as first argument and the
request object will be closed automatically::
@Request.application
def my_wsgi_app(request):
return Response('Hello World!')
:param f: the WSGI callable to decorate
:return: a new WSGI callable
"""
#: return a callable that wraps the -2nd argument with the request
#: and calls the function with all the arguments up to that one and
#: the request. The return value is then called with the latest
#: two arguments. This makes it possible to use this decorator for
#: both methods and standalone WSGI functions.
def application(*args):
request = cls(args[-2])
with request:
return f(*args[:-2] + (request,))(*args[-2:])
return update_wrapper(application, f)
def application(cls, f):
"""Decorate a function as responder that accepts the request as first
argument. This works like the :func:`responder` decorator but the
function is passed the request object as first argument and the
request object will be closed automatically::
@Request.application
def my_wsgi_app(request):
return Response('Hello World!')
:param f: the WSGI callable to decorate
:return: a new WSGI callable
"""
#: return a callable that wraps the -2nd argument with the request
#: and calls the function with all the arguments up to that one and
#: the request. The return value is then called with the latest
#: two arguments. This makes it possible to use this decorator for
#: both methods and standalone WSGI functions.
def application(*args):
request = cls(args[-2])
with request:
return f(*args[:-2] + (request,))(*args[-2:])
return update_wrapper(application, f)
def exhaust_stream(f):
"""Helper decorator for methods that exhausts the stream on return."""
def wrapper(self, stream, *args, **kwargs):
try:
return f(self, stream, *args, **kwargs)
finally:
exhaust = getattr(stream, 'exhaust', None)
if exhaust is not None:
exhaust()
else:
while 1:
chunk = stream.read(1024 * 64)
if not chunk:
break
return update_wrapper(wrapper, f)
def decorator(target):
"""A signature-matching decorator factory."""
def decorate(fn):
if not inspect.isfunction(fn):
raise Exception("not a decoratable function")
spec = compat.inspect_getfullargspec(fn)
names = tuple(spec[0]) + spec[1:3] + (fn.__name__,)
targ_name, fn_name = _unique_symbols(names, 'target', 'fn')
metadata = dict(target=targ_name, fn=fn_name)
metadata.update(format_argspec_plus(spec, grouped=False))
metadata['name'] = fn.__name__
code = """\
def %(name)s(%(args)s):
return %(target)s(%(fn)s, %(apply_kw)s)
""" % metadata
decorated = _exec_code_in_env(code,
{targ_name: target, fn_name: fn},
fn.__name__)
decorated.__defaults__ = getattr(fn, 'im_func', fn).__defaults__
decorated.__wrapped__ = fn
return update_wrapper(decorated, fn)
return update_wrapper(decorate, target)
def application(cls, f):
"""Decorate a function as responder that accepts the request as first
argument. This works like the :func:`responder` decorator but the
function is passed the request object as first argument and the
request object will be closed automatically::
@Request.application
def my_wsgi_app(request):
return Response('Hello World!')
:param f: the WSGI callable to decorate
:return: a new WSGI callable
"""
#: return a callable that wraps the -2nd argument with the request
#: and calls the function with all the arguments up to that one and
#: the request. The return value is then called with the latest
#: two arguments. This makes it possible to use this decorator for
#: both methods and standalone WSGI functions.
def application(*args):
request = cls(args[-2])
with request:
return f(*args[:-2] + (request,))(*args[-2:])
return update_wrapper(application, f)
