Issue with example1.py

[kolesman]

Hi, guys!

When I run example1.py it raises exeception.
"""
kolesman@kolesman-Latitude:~/vowpal_porpoise/examples$ python example1.py
example1: training
[DEBUG] No existing model file or not options.incremental
[DEBUG] Running command: "vw --learning_rate=15.000000 --power_t=1.000000 --passes 10 --cache_file /home/kolesman/vowpal_porpoise/examples/example1.cache -f /home/kolesman/vowpal_porpoise/examples/example1.model"
done streaming.
final_regressor = /home/kolesman/vowpal_porpoise/examples/example1.model
Num weight bits = 18
learning rate = 15
initial_t = 0
power_t = 1
decay_learning_rate = 1
creating cache_file = /home/kolesman/vowpal_porpoise/examples/example1.cache
Reading datafile =
num sources = 1
average since example example current current current
loss last counter weight label predict features
0.360904 0.360904 3 3.0 1.0000 0.7933 5
0.266263 0.171622 6 6.0 0.0000 0.2465 5
-nan -nan 11 11.0 0.0000 0.0000 5 h
-nan -nan 22 22.0 0.0000 0.0000 5 h
-nan -nan 44 44.0 1.0000 1.0000 5 h
Traceback (most recent call last):
File "example1.py", line 86, in
for (instance, prediction) in SimpleModel('example1').train(instances).predict(instances):
File "example1.py", line 44, in train
print 'done streaming.'
File "/usr/lib/python2.7/contextlib.py", line 24, in exit
self.gen.next()
File "/usr/local/lib/python2.7/dist-packages/vowpal_porpoise-0.3-py2.7.egg/vowpal_porpoise/vw.py", line 167, in training
self.close_process()
File "/usr/local/lib/python2.7/dist-packages/vowpal_porpoise-0.3-py2.7.egg/vowpal_porpoise/vw.py", line 203, in close_process
(self.vw_process.pid, self.vw_process.command, self.vw_process.returncode))
Exception: vw_process 22007 (vw --learning_rate=15.000000 --power_t=1.000000 --passes 10 --cache_file /home/kolesman/vowpal_porpoise/examples/example1.cache -f /home/kolesman/vowpal_porpoise/examples/example1.model) exited abnormally with return code -11
"""

Do you have any ideas what is the source of problem?

[kolesman]

It is a problem of current version of vowpal wabbit. I will report this bug on vw's mailing list.

[kolesman]

Here is thread with John Langford's reply to this problem:
http://groups.yahoo.com/neo/groups/vowpal_wabbit/conversations/topics/2502

I think you should fix your examples, because they could be confusing.