ulc-devs team mailing list archive

[Frederik Elwert <frederik.elwert@xxxxxx>]

Hello,

I am still trying to write a Folks client in Python. Thanks again for
the fast fix for my last issue.

Since I had some trouble getting folks 0.6.6 running on Ubuntu 11.10, I
just upgraded to 12.04, which has folks 0.6.6. Now I am trying again to
digg into the python/Folks combo.

I tried with this simple test script:

----8<----
from gi.repository import GObject
from gi.repository import Folks


def list_individuals():
    for key in aggregator.props.individuals.props.keys:
        print aggregator.props.individuals.get(key)

aggregator = Folks.IndividualAggregator.new()
aggregator.prepare(None, None)

GObject.timeout_add(2000, list_individuals)

main_loop = GObject.MainLoop()
main_loop.run()
---->8----

Now I get this traceback:

Traceback (most recent call last):
  File "folkstest.py", line 6, in list_individuals
    for key in aggregator.props.individuals.props.keys:
TypeError: '__main__.GeeHashMapKeySet' object is not iterable

So the gee bindings seem not to work the python way. I read the gee API
doc, and then came up with something I had hoped would work:

----8<----
def list_individuals():
    iterator = aggregator.props.individuals.props.keys.iterator()
    while iterator.has_next():
        iterator.next()
        key = iterator.get()
        print aggregator.props.individuals.get(key)
---->8----

This, however, segfaults. The issue seems to be the iterator.get()
method call. I tried to get a backtrace using gdb, but since my
debugging skills are very limited, I am not sure how useful it is. I
attached it anyways, if you need more information, please just let me
know.

Now I don’t know if I just used the API incorrectly, or if gee just does
not work from Python. But I still hope to use Folks from python, and I
wanted to investigate a bit further, before I ditch everything and start
all over with vala.

So if anybody has any idea or advice, I’d be thankful.

Regards
Frederik

from gi.repository import GObject
from gi.repository import Folks


def list_individuals():
    for key in aggregator.props.individuals.props.keys:
        print aggregator.props.individuals.get(key)

aggregator = Folks.IndividualAggregator.new()
aggregator.prepare(None, None)

GObject.timeout_add(2000, list_individuals)

main_loop = GObject.MainLoop()
main_loop.run()

from gi.repository import GObject
from gi.repository import Folks


def list_individuals():
    iterator = aggregator.props.individuals.props.keys.iterator()
    while iterator.has_next():
        iterator.next()
        key = iterator.get()
        print aggregator.props.individuals.get(key)

aggregator = Folks.IndividualAggregator.new()
aggregator.prepare(None, None)

GObject.timeout_add(2000, list_individuals)

main_loop = GObject.MainLoop()
main_loop.run()

(gdb) run folkstest2.py
Starting program: /usr/bin/python folkstest2.py
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[New Thread 0xb7ad2b70 (LWP 6887)]
[New Thread 0xb70ffb70 (LWP 6888)]
[New Thread 0xb68feb70 (LWP 6889)]
[New Thread 0xb60fdb70 (LWP 6890)]
[Thread 0xb7ad2b70 (LWP 6887) exited]
[Thread 0xb68feb70 (LWP 6889) exited]
[New Thread 0xb68feb70 (LWP 6894)]
[New Thread 0xb7ad2b70 (LWP 6895)]
[New Thread 0xb58fcb70 (LWP 6896)]
[New Thread 0xb50fbb70 (LWP 6897)]
[New Thread 0xb48fab70 (LWP 6898)]
[New Thread 0xb40f9b70 (LWP 6899)]
[New Thread 0xb38f8b70 (LWP 6900)]
[New Thread 0xb30f7b70 (LWP 6901)]
[New Thread 0xb28f6b70 (LWP 6902)]
[Thread 0xb50fbb70 (LWP 6897) exited]
[Thread 0xb30f7b70 (LWP 6901) exited]
[Thread 0xb70ffb70 (LWP 6888) exited]
[Thread 0xb40f9b70 (LWP 6899) exited]
[Thread 0xb38f8b70 (LWP 6900) exited]
[Thread 0xb28f6b70 (LWP 6902) exited]
[Thread 0xb7ad2b70 (LWP 6895) exited]
[Thread 0xb68feb70 (LWP 6894) exited]
[Thread 0xb48fab70 (LWP 6898) exited]

Program received signal SIGSEGV, Segmentation fault.
0x0812d40b in visit_decref ()
(gdb) bt
#0  0x0812d40b in visit_decref ()
#1  0x080b9a6c in tupletraverse ()
#2  0x0812d624 in collect ()
#3  0x0812e179 in _PyObject_GC_Malloc ()
#4  0x0812e1f5 in _PyObject_GC_NewVar ()
#5  0x080ba2e6 in PyTuple_New ()
#6  0x080fbbaa in PyEval_EvalFrameEx ()
#7  0x080fd7e8 in PyEval_EvalCodeEx ()
#8  0x080fe187 in PyEval_EvalCode ()
#9  0x08111ee2 in PyImport_ExecCodeModuleEx ()
#10 0x081120ff in load_source_module ()
#11 0x08112d69 in import_submodule ()
#12 0x08113011 in load_next ()
#13 0x08113759 in import_module_level ()
#14 0x08113dd1 in PyImport_ImportModuleLevel ()
#15 0x080f5aef in builtin___import__ ()
#16 0x0805dd01 in PyObject_Call ()
#17 0x080f702e in PyEval_CallObjectWithKeywords ()
#18 0x080f987d in PyEval_EvalFrameEx ()
#19 0x080fd7e8 in PyEval_EvalCodeEx ()
#20 0x080fe187 in PyEval_EvalCode ()
#21 0x08111ee2 in PyImport_ExecCodeModuleEx ()
#22 0x081120ff in load_source_module ()
#23 0x08112d69 in import_submodule ()
#24 0x08113011 in load_next ()
#25 0x08113759 in import_module_level ()
#26 0x08113dd1 in PyImport_ImportModuleLevel ()
#27 0x080f5aef in builtin___import__ ()
#28 0x0805dd01 in PyObject_Call ()
#29 0x080f702e in PyEval_CallObjectWithKeywords ()
#30 0x080f987d in PyEval_EvalFrameEx ()
#31 0x080fd7e8 in PyEval_EvalCodeEx ()
#32 0x080fe187 in PyEval_EvalCode ()
#33 0x08111ee2 in PyImport_ExecCodeModuleEx ()
#34 0x081120ff in load_source_module ()
#35 0x08112d69 in import_submodule ()
#36 0x08113011 in load_next ()
#37 0x08113759 in import_module_level ()
#38 0x08113dd1 in PyImport_ImportModuleLevel ()
#39 0x080f5aef in builtin___import__ ()
#40 0x0805dd01 in PyObject_Call ()
#41 0x080f702e in PyEval_CallObjectWithKeywords ()
#42 0x080f987d in PyEval_EvalFrameEx ()
#43 0x080fd7e8 in PyEval_EvalCodeEx ()
#44 0x0808c602 in function_call ()
#45 0x0805dd01 in PyObject_Call ()
#46 0x080f702e in PyEval_CallObjectWithKeywords ()
#47 0x0811bea4 in PyErr_PrintEx ()
#48 0x0811c0cf in PyErr_Print ()
#49 0x006a2175 in _pyglib_handler_marshal (user_data=0xb7b8fd0c)
    at /build/buildd/pygobject-3.0.3/gi/_glib/pyglib.c:535
#50 0x005f044f in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#51 0x005ef6ea in g_main_context_dispatch ()
   from /lib/i386-linux-gnu/libglib-2.0.so.0
#52 0x005efaf5 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#53 0x005eff3b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#54 0x008991b8 in _wrap_g_main_loop_run (self=0xb7fd5320)
    at /build/buildd/pygobject-3.0.3/gi/_glib/pygmainloop.c:334
#55 0x080f8958 in PyEval_EvalFrameEx ()
#56 0x080fd7e8 in PyEval_EvalCodeEx ()
#57 0x080fe187 in PyEval_EvalCode ()
#58 0x0811ad10 in run_mod ()
#59 0x0811b929 in PyRun_FileExFlags ()
#60 0x0811c47c in PyRun_SimpleFileExFlags ()
#61 0x0812c7f6 in Py_Main ()
#62 0x0805dadb in main ()