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+What's New in Pyramid 1.10
+==========================
+
+This article explains the new features in :app:`Pyramid` version 1.10 as compared to its predecessor, :app:`Pyramid` 1.9. It also documents backwards incompatibilities between the two versions and deprecations added to :app:`Pyramid` 1.10, as well as software dependency changes and notable documentation additions.
+
+.. note::
+
+    This release is the last planned release feature release to support Python 2.7.
+    Bug fixes will continue to be backported until at least 2020-01-01 when Python 2.7 reaches end of life.
+    New features, and backports will be reviewed and accepted for the 1.x series of Pyramid but new development will be focused on Pyramid 2.x.
+
+Feature Additions
+-----------------
+
+- Add support for Python 3.7. Add testing on Python 3.8 with allowed failures.
+  See https://github.com/Pylons/pyramid/pull/3333
+
+- Add a context manager :meth:`pyramid.config.Configurator.route_prefix_context` to allow for convenient setting of the ``route_prefix`` for :meth:`pyramid.config.Configurator.include` and :meth:`pyramid.config.Configurator.add_route` calls inside the context.
+  See https://github.com/Pylons/pyramid/pull/3279
+
+- Added the :meth:`pyramid.config.Configurator.add_accept_view_order` directive, allowing users to specify media type preferences in ambiguous situations such as when several views match.
+  A default ordering is defined for media types that prefers human-readable html/text responses over JSON.
+  See https://github.com/Pylons/pyramid/pull/3326
+
+- Support a list of media types in the ``accept`` predicate used in :meth:`pyramid.config.Configurator.add_route`.
+  See https://github.com/Pylons/pyramid/pull/3326
+
+- Added :class:`pyramid.session.JSONSerializer`.
+  See "Upcoming Changes to ISession in Pyramid 2.0" in the "Sessions" chapter of the documentation for more information about this feature.
+  See https://github.com/Pylons/pyramid/pull/3353
+
+- Modify the builtin session implementations to support ``SameSite`` options on cookies and set the default to ``'Lax'``.
+  This affects :func:`pyramid.session.BaseCookieSessionFactory`, :func:`pyramid.session.SignedCookieSessionFactory`, and :func:`pyramid.session.UnencryptedCookieSessionFactoryConfig`.
+  See https://github.com/Pylons/pyramid/pull/3300
+
+- Modify :class:`pyramid.authentication.AuthTktAuthenticationPolicy` and :class:`pyramid.csrf.CookieCSRFStoragePolicy` to support the ``SameSite`` option on cookies and set the default to ``'Lax'``.
+  See https://github.com/Pylons/pyramid/pull/3319
+
+- Added new :class:`pyramid.httpexceptions.HTTPPermanentRedirect` exception/response object for a HTTP 308 redirect.
+  See https://github.com/Pylons/pyramid/pull/3302
+
+- Add ``_depth`` and ``_category`` arguments to all of the venusian decorators.
+  The ``_category`` argument can be used to affect which actions are registered when performing a ``config.scan(..., category=...)`` with a specific category.
+  The ``_depth`` argument should be used when wrapping the decorator in your own.
+  This change affects :func:`pyramid.view.view_config`, :func:`pyramid.view.exception_view_config`, :func:`pyramid.view.forbidden_view_config`, :func:`pyramid.view.notfound_view_config`, :func:`pyramid.events.subscriber` and :func:`pyramid.response.response_adapter` decorators.
+  See https://github.com/Pylons/pyramid/pull/3105 and https://github.com/Pylons/pyramid/pull/3122
+
+- Fix the :class:`pyramid.request.Request` class name after using :meth:`pyramid.request.Request.set_property` or :meth:`pyramid.config.Configurator.add_request_method` such that the ``str(request.__class__)`` would appear as ``pyramid.request.Request`` instead of ``pyramid.util.Request``.
+  See https://github.com/Pylons/pyramid/pull/3129
+
+- Add a ``registry`` argument to :func:`pyramid.renderers.get_renderer` to allow users to avoid threadlocals during renderer lookup.
+  See https://github.com/Pylons/pyramid/pull/3358
+
+- Within ``pshell``, allow the user-defined ``setup`` function to be a generator, in which case it may wrap the command's lifecycle.
+  See https://github.com/Pylons/pyramid/pull/3318
+
+- Within ``pshell``, variables defined by the ``[pshell]`` settings are available within the user-defined ``setup`` function.
+  See https://github.com/Pylons/pyramid/pull/3318
+
+- In ``cherrypy_server_runner``, prefer imports from the ``cheroot`` package over the legacy imports from `cherrypy.wsgiserver`.
+  See https://github.com/Pylons/pyramid/pull/3235
+
+Deprecations
+------------
+
+- The :class:`pyramid.intefaces.ISession` interface will move to require JSON-serializable objects in :app:`Pyramid` 2.0. See "Upcoming Changes to ISession in Pyramid 2.0" in the "Sessions" chapter of the documentation for more information about this change.
+  See https://github.com/Pylons/pyramid/pull/3353
+
+- The :func:`pyramid.session.signed_serialize` and :func:`pyramid.session.signed_deserialize` functions will be removed in :app:`Pyramid` 2.0, along with the removal of :func:`pyramid.session.UnencryptedCookieSessionFactoryConfig` which was deprecated in :app:`Pyramid` 1.5.
+  Please switch to using the :func:`pyramid.session.SignedCookieSessionFactory`, copying the code, or another session implementation if you're still using these features.
+  See https://github.com/Pylons/pyramid/pull/3353
+
+- Media ranges are deprecated in the ``accept`` argument of :meth:`pyramid.config.Configurator.add_route`.
+  Use a list of explicit media types to ``add_route`` to support multiple types.
+  See https://github.com/Pylons/pyramid/pull/3326
+
+- Media ranges are deprecated in the ``accept`` argument of :meth:`pyramid.config.Configurator.add_view`.
+  There is no replacement for ranges to ``add_view``, but after much discussion the workflow is fundamentally ambiguous in the face of various client-supplied values for the ``Accept`` header.
+  See https://github.com/Pylons/pyramid/pull/3326
+
+Backward Incompatibilities
+--------------------------
+
+- On Python 3.4+ the ``repoze.lru`` dependency is dropped. If you were using this package directly in your apps you should make sure that you are depending on it directly within your project.
+  See https://github.com/Pylons/pyramid/pull/3140
+
+- Remove the ``permission`` argument from :meth:`pyramid.config.Configurator.add_route`.
+  This was an argument left over from a feature removed in :app:`Pyramid` 1.5 and has had no effect since then.
+  See https://github.com/Pylons/pyramid/pull/3299
+
+- Modify the builtin session implementations to set ``SameSite='Lax'`` on cookies.
+  This affects :func:`pyramid.session.BaseCookieSessionFactory`, :func:`pyramid.session.SignedCookieSessionFactory`, and :func:`pyramid.session.UnencryptedCookieSessionFactoryConfig`.
+  See https://github.com/Pylons/pyramid/pull/3300
+
+- Variables defined in the ``[pshell]`` section of the settings will no longer override those set by the ``setup`` function.
+  See https://github.com/Pylons/pyramid/pull/3318
+
+- :meth:`pyramid.config.Configurator.add_notfound_view` uses default redirect class exception :class:`pyramid.httpexceptions.HTTPTemporaryRedirect` instead of previous :class:`pyramid.httpexceptions.HTTPFound`.
+  See https://github.com/Pylons/pyramid/pull/3328
+
+- Removed ``pyramid.config.Configurator.set_request_property`` which had been deprecated since :app:`Pyramid` 1.5.
+  Instead use :meth:`pyramid.config.Configurator.add_request_method` with ``reify=True`` or ``property=True``.
+  See https://github.com/Pylons/pyramid/pull/3368
+
+- Removed the ``principal`` keyword argument from :func:`pyramid.security.remember` which had been deprecated since :app:`Pyramid` 1.6 and replaced by the ``userid`` argument.
+  See https://github.com/Pylons/pyramid/pull/3369
+
+Documentation Enhancements
+--------------------------
+
+- Ad support for Read The Docs Ethical Ads.
+  See https://github.com/Pylons/pyramid/pull/3360 and https://docs.readthedocs.io/en/latest/advertising/ethical-advertising.html
+
+- Add support for alembic to the pyramid-cookiecutter-alchemy cookiecutter and update the wiki2 tutorial to explain how it works.
+  See https://github.com/Pylons/pyramid/pull/3307 and https://github.com/Pylons/pyramid-cookiecutter-alchemy/pull/7
+
+- Bump Sphinx to >= 1.7.4 in setup.py to support ``emphasize-lines`` in PDFs and to pave the way for xelatex support.
+  See https://github.com/Pylons/pyramid/pull/3271, https://github.com/Pylons/pyramid/issues/667, and https://github.com/Pylons/pyramid/issues/2572
+
+- Added extra tests to the quick tutorial.
+  See https://github.com/Pylons/pyramid/pull/3375