Python 金字塔订阅服务器谓词不工作

我使用的是金字塔1.4a1，我有一个订户谓词：

class RouteName(object):
    '''
    Subscriber predicate to check against route name.
    '''

    def __init__(self, value, config):
        self.value = value
        self.config = config

    def text(self):
        return 'route_name = %s' % self.value
    phash = text

    def __call__(self, event):
        route_name = event.request.matched_route.name
        return route_name == self.value

我这样补充：

config.add_subscriber_predicate('route_name', RouteName)

但是，每当我尝试使用它时，就像这样：

@subscriber(ContextFound, route_name='user.register')
def check_invitation(event):
    # Check invitation token before running registration view code ...

我得到了这个回溯：

Traceback (most recent call last):
  File "/Workspace/Personal/project/.env/bin/pserve", line 8, in <module>
    load_entry_point('pyramid==1.4a1', 'console_scripts', 'pserve')()
  File "/Workspace/Personal/project/.env/local/lib/python2.7/site-packages/pyramid/scripts/pserve.py", line 47, in main
    return command.run()
  File "/Workspace/Personal/project/.env/local/lib/python2.7/site-packages/pyramid/scripts/pserve.py", line 290, in run
    relative_to=base, global_conf=vars)
  File "/Workspace/Personal/project/.env/local/lib/python2.7/site-packages/pyramid/scripts/pserve.py", line 318, in loadapp
    return loadapp(app_spec, name=name, relative_to=relative_to, **kw)
  File "/Workspace/Personal/project/.env/local/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py", line 247, in loadapp
    return loadobj(APP, uri, name=name, **kw)
  File "/Workspace/Personal/project/.env/local/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py", line 272, in loadobj
    return context.create()
  File "/Workspace/Personal/project/.env/local/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py", line 710, in create
    return self.object_type.invoke(self)
  File "/Workspace/Personal/project/.env/local/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py", line 146, in invoke
    return fix_call(context.object, context.global_conf, **context.local_conf)
  File "/Workspace/Personal/project/.env/local/lib/python2.7/site-packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/util.py", line 56, in fix_call
    val = callable(*args, **kw)
  File "/Workspace/Personal/project/project/__init__.py", line 49, in main
    return config.make_wsgi_app()
  File "/Workspace/Personal/project/.env/local/lib/python2.7/site-packages/pyramid/config/__init__.py", line 955, in make_wsgi_app
    self.commit()
  File "/Workspace/Personal/project/.env/local/lib/python2.7/site-packages/pyramid/config/__init__.py", line 629, in commit
    self.action_state.execute_actions(introspector=self.introspector)
  File "/Workspace/Personal/project/.env/local/lib/python2.7/site-packages/pyramid/config/__init__.py", line 1083, in execute_actions
    tb)
  File "/Workspace/Personal/project/.env/local/lib/python2.7/site-packages/pyramid/config/__init__.py", line 1075, in execute_actions
    callable(*args, **kw)
  File "/Workspace/Personal/project/.env/local/lib/python2.7/site-packages/pyramid/config/adapters.py", line 53, in register
    order, preds, phash = predlist.make(self, **predicates)
  File "/Workspace/Personal/project/.env/local/lib/python2.7/site-packages/pyramid/config/util.py", line 264, in make
    pred = predicate_factory(val, config)
pyramid.exceptions.ConfigurationExecutionError: <type 'exceptions.TypeError'>: object.__new__() takes no parameters
  in:
  Line 80 of file /Workspace/Personal/project/.env/local/lib/python2.7/site-packages/pyramid/events.py:
    config.add_subscriber(wrapped, iface, **self.predicates)

回溯（最近一次呼叫最后一次）：
文件“/Workspace/Personal/project/.env/bin/pserve”，第8行，在
加载入口点（'pyramid==1.4a1'，'console\u scripts'，'pserve'）（）
文件“/Workspace/Personal/project/.env/local/lib/python2.7/site packages/pyramid/scripts/pserve.py”，第47行，主目录
return命令。run（）
文件“/Workspace/Personal/project/.env/local/lib/python2.7/site packages/pyramid/scripts/pserve.py”，第290行，正在运行
相对位置=基准，全局位置=变量）
loadapp中的文件“/Workspace/Personal/project/.env/local/lib/python2.7/site packages/pyramid/scripts/pserve.py”，第318行
返回loadapp（应用规格，名称=名称，相对到=相对到，**千瓦）
loadapp中的文件“/Workspace/Personal/project/.env/local/lib/python2.7/site packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py”，第247行
返回loadobj（应用程序，uri，name=name，**kw）
loadobj中的文件“/Workspace/Personal/project/.env/local/lib/python2.7/site packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py”，第272行
返回context.create（）
文件“/Workspace/Personal/project/.env/local/lib/python2.7/site packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py”，第710行，在create中
返回self.object\u type.invoke（self）
文件“/Workspace/Personal/project/.env/local/lib/python2.7/site packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/loadwsgi.py”，第146行，在invoke中
返回修复调用（context.object、context.global\u conf、**context.local\u conf）
文件“/Workspace/Personal/project/.env/local/lib/python2.7/site packages/PasteDeploy-1.5.0-py2.7.egg/paste/deploy/util.py”，第56行，在fix_call中
val=可调用（*参数，**kw）
文件“/Workspace/Personal/project/project/_init__.py”，第49行，在main中
return config.make_wsgi_app（）
make_wsgi_应用程序中的文件“/Workspace/Personal/project/.env/local/lib/python2.7/site packages/pyramid/config/_init__.py”，第955行
self.commit（）
提交中的文件“/Workspace/Personal/project/.env/local/lib/python2.7/site packages/pyramid/config/_init__.py”，第629行
self.action\u state.execute\u actions（introspector=self.introspector）
文件“/Workspace/Personal/project/.env/local/lib/python2.7/site packages/pyramid/config/_init__.py”，第1083行，在执行操作中
结核病）
文件“/Workspace/Personal/project/.env/local/lib/python2.7/site packages/pyramid/config/_init__.py”，执行操作中的第1075行
可调用（*参数，**kw）
文件“/Workspace/Personal/project/.env/local/lib/python2.7/site packages/pyramid/config/adapters.py”，第53行，在寄存器中
order，preds，phash=predlist.make（self，**谓词）
文件“/Workspace/Personal/project/.env/local/lib/python2.7/site packages/pyramid/config/util.py”，第264行，在make中
pred=谓词工厂（val，config）
pyramid.exceptions.ConfigurationExecutionError:：object.\uuu new\uuuu（）不接受任何参数
在：
文件/Workspace/Personal/project/.env/local/lib/python2.7/site-packages/pyramid/events.py的第80行：
config.add_订阅服务器（包装、iface、**self.predicates）

---

我还以同样的方式注册了一个自定义视图谓词，它工作得很好，所以我不知道我在这里做错了什么。

我认为您的代码中有一个输入错误。下面的应用程序 在1.4a1下工作。如果您访问/它打印检查。如果你拜访了另一个人， 它没有：

from wsgiref.simple_server import make_server
from pyramid.config import Configurator
from pyramid.events import subscriber, ContextFound
from pyramid.view import view_config

class RouteName(object):
    '''
    Subscriber predicate to check against route name.
    '''

    def __init__(self, value, config):
        self.value = value
        self.config = config

    def text(self):
        return 'route_name = %s' % self.value

    phash = text

    def __call__(self, event):
        route_name = getattr(event.request.matched_route, 'name', None)
        return route_name == self.value

@subscriber(ContextFound, route_name='home')
def check(event):
    print 'checked'

@view_config(renderer='string', route_name='home')
def home(request):
    return 'home'

@view_config(renderer='string', route_name='another')
def another(request):
    return 'another'

if __name__ == '__main__':
    config = Configurator()
    config.add_subscriber_predicate('route_name', RouteName)
    config.add_route('home', '/')
    config.add_route('another', '/another')
    config.scan()
    app = config.make_wsgi_app()
    server = make_server('0.0.0.0', 8080, app)
    server.serve_forever()