I'm trying to use pymongo out of IronPython, and I'm having issues. For a simple example, I just want to extract the database names:
import rpyc c = rpyc.classic.connect('localhost', port=12345) pymongo = c.modules['pymongo'] conn = pymongo.MongoClient('localhost') print conn.database_names()
This returns the following from IronPython:
Message: 'Database' object is not callable. If you meant to call the 'exposed_database_names' method on a 'MongoClient' object it is failing because no such method exists.
This works perfectly under 'regular' python, which is running a classic server. Any ideas on why this doesn't work or what the error message means?
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Hi, quick note:
This issue occurs on CPython as well and is not in any way specific to IronPython or windows.
The reason is the
Possible server-side fixes:
Possible fixes in rpyc:
EDIT: I finally came to the conclusion that these changes are a good idea on their own to keep the principle of least surprise and have therefore applied these fixes to rpyc. It should be included in the next release (4.0).
Fixes #165 for services with allow_exposed_attrs=True. One may argue whether it was a security feature that an exposed attribute would always override a plain attribute even if one would have the permissions to access that one otherwise… However, this case was not documented and I believe such a policy calls for a more careful implementation anyway (you probably don't want to serve objects where a private attribute is only protected by shadowing).
This release brings a few minor backward incompatibilities, so be sure to read on before upgrading. However, fear not: the ones that are most likely relevant to you have a relatively simple migration path. Backward Incompatibilities ^^^^^^^^^^^^^^^^^^^^^^^^^^ * ``classic.teleport_function`` now executes the function in the connection's namespace by default. To get the old behaviour, use ``teleport_function(conn, func, conn.modules[func.__module__].__dict__)`` instead. * Changed signature of ``Service.on_connect`` and ``on_disconnect``, adding the connection as argument. * Changed signature of ``Service.__init__``, removing the connection argument * no longer store connection as ``self._conn``. (allows services that serve multiple clients using the same service object, see `#198`_). * ``SlaveService`` is now split into two asymetric classes: ``SlaveService`` and ``MasterService``. The slave exposes functionality to the master but can not anymore access remote objects on the master (`#232`_, `#248`_). If you were previously using ``SlaveService``, you may experience problems when feeding the slave with netrefs to objects on the master. In this case, do any of the following: * use ``ClassicService`` (acts exactly like the old ``SlaveService``) * use ``SlaveService`` with a ``config`` that allows attribute access etc * use ``rpyc.utils.deliver`` to feed copies rather than netrefs to the slave * ``RegistryServer.on_service_removed`` is once again called whenever a service instance is removed, making it symmetric to ``on_service_added`` (`#238`_) This reverts PR `#173`_ on issue `#172`_. * Removed module ``rpyc.experimental.splitbrain``. It's too confusing and undocumented for me and I won't be developing it, so better remove it altogether. (It's still available in the ``splitbrain`` branch) * Removed module ``rpyc.experimental.retunnel``. Seemingly unused anywhere, no documentation, no clue what this is about. * ``bin/rpyc_classic.py`` will bind to ``127.0.0.1`` instead of ``0.0.0.0`` by default * ``SlaveService`` no longer serves exposed attributes (i.e., it now uses ``allow_exposed_attrs=False``) * Exposed attributes no longer hide plain attributes if one otherwise has the required permissions to access the plain attribute. (`#165`_) .. _#165: #165 .. _#172: #172 .. _#173: #173 .. _#198: #198 .. _#232: #232 .. _#238: #238 .. _#248: #248 What else is new ^^^^^^^^^^^^^^^^ * teleported functions will now be defined by default in the globals dict * Can now explicitly specify globals for teleported functions * Can now use streams as context manager * keep a hard reference to connection in netrefs, may fix some ``EOFError`` issues, in particular on Jython related (`#237`_) * handle synchronous and asynchronous requests uniformly * fix deadlock with connections talking to each other multithreadedly (`#270`_) * handle timeouts cumulatively * fix possible performance bug in ``Win32PipeStream.poll`` (oversleeping) * use readthedocs theme for documentation (`#269`_) * actually time out sync requests (`#264`_) * clarify documentation concerning exceptions in ``Connection.ping`` (`#265`_) * fix ``__hash__`` for netrefs (`#267`_, `#268`_) * rename ``async`` module to ``async_`` for py37 compatibility (`#253`_) * fix ``deliver()`` from IronPython to CPython2 (`#251`_) * fix brine string handling in py2 IronPython (`#251`_) * add gevent_ Server. For now, this requires using ``gevent.monkey.patch_all()`` before importing for rpyc. Client connections can already be made without further changes to rpyc, just using gevent's monkey patching. (`#146`_) * add function ``rpyc.lib.spawn`` to spawn daemon threads * fix several bugs in ``bin/rpycd.py`` that crashed this script on startup (`#231`_) * fix problem with MongoDB, or more generally any remote objects that have a *catch-all* ``__getattr__`` (`#165`_) * fix bug when copying remote numpy arrays (`#236`_) * added ``rpyc.utils.helpers.classpartial`` to bind arguments to services (`#244`_) * can now pass services optionally as instance or class (could only pass as class, `#244`_) * The service is now charged with setting up the connection, doing so in ``Service._connect``. This allows using custom protocols by e.g. subclassing ``Connection``. More discussions and related features in `#239`_-`#247`_. * service can now easily override protocol handlers, by updating ``conn._HANDLERS`` in ``_connect`` or ``on_connect``. For example: ``conn._HANDLERS[HANDLE_GETATTR] = self._handle_getattr``. * most protocol handlers (``Connection._handle_XXX``) now directly get the object rather than its ID as first argument. This makes overriding individual handlers feel much more high-level. And by the way it turns out that this fixes two long-standing issues (`#137`_, `#153`_) * fix bug with proxying context managers (`#228`_) * expose server classes from ``rpyc`` top level module * fix logger issue on jython .. _#137: #137 .. _#146: #146 .. _#153: #153 .. _#165: #165 .. _#228: #228 .. _#231: #231 .. _#236: #236 .. _#237: #237 .. _#239: #239 .. _#244: #244 .. _#247: #247 .. _#251: #251 .. _#253: #253 .. _#264: #264 .. _#265: #265 .. _#267: #267 .. _#268: #268 .. _#269: #269 .. _#270: #270 .. _gevent: http://www.gevent.org/