Well, I'm stuck in a predicament where I have to get this code working
by this thurs at 1pm, and my python dev insists the bug is inside
owfs, and therefore is not doing anything else. I'm not proficient in
python yet myself, so I'm having difficulty proving/disproving
anything in this case. So, I'm looking for any help/suggestions.
I did some googling, and found this samle code online (owfs sf faq site):
def tree( sensor ):
print '%7s - %s' % ( sensor._type, sensor._path )
for next in sensor.sensors( ):
if next._type in [ 'DS2409', ]:
tree( next )
else:
print '%7s - %s' % ( next._type, next._path )
if __name__ == "__main__":
if len( sys.argv ) == 1:
print 'usage: tree.py u|serial_port_path'
sys.exit( 1 )
else:
ow.init( sys.argv[ 1 ] )
tree( ow.Sensor( '/' ) )
This program (from http://owfs.sourceforge.net/faq.html ) should
simply list all the devices in the tree. Instead, what I get is this:
casasdbu...@debug /usr/local/CASAS $ python2.6 ~/ow-test.py u
DS9490 - /
Exception RuntimeError: 'maximum recursion depth exceeded in
__subclasscheck__' in <type 'exceptions.AttributeError'> ignored
DS2406 - /12.748046000000
Exception RuntimeError: 'maximum recursion depth exceeded in
__subclasscheck__' in <type 'exceptions.AttributeError'> ignored
DS2406 - /12.DD365F000000
Exception RuntimeError: 'maximum recursion depth exceeded in
__subclasscheck__' in <type 'exceptions.AttributeError'> ignored
DS1420 - /81.05412A000000
The above devices are accurate; I have two DS2406 devices hooked into
a USB 2490 master. However, the maximum recursion depth is a major
problem, and causes our code to blow up.
I'd greatly appreciate any help in fixing this. I'm also curious to
hear from others that are using owpython, especially with python2.6.
Thanks!
--Jim
On Tue, Jul 20, 2010 at 2:08 PM, Jim Kusznir <jkusz...@gmail.com> wrote:
> Hi all:
>
> Our lab has been fighting against a problem recently with owfs and python 2.6.
>
> We had been happily using python 2.5 and owfs p22 for quite some time.
> Its been nice and stable, and life was good. Unfortunately, we had a
> new piece of code that required us to upgrade our python system. Ever
> since upgrading to 2.6, our attempts at running our software blow up.
> Our software engineer on the project traced the blow-up to when he
> called an owfs function. The blow-up is a recursion depth problem,a
> nd in the process, it only sees one OW device on our network now.
>
> So, first thing we did: upgraded to the latest version of owfs (p39),
> and retry. Unfortunately, the behavior is the same. We're at a loss,
> as we have stripped out as much of our code as possible.
>
> I'm currently trying to get a dev machine going on python2.5 again to
> try and concretely nail down the problem, but for the moment, this is
> what I have. Any suggestions?
>
> Here's sample output:
>
> casasdbu...@debug /usr/local/CASAS $ ./casas_OneWireAgent.py
> authenticated
> raw =
> 12.748046000000/,12.DD365F000000/,81.05412A000000/,bus.0/,settings/,system/,statistics/,structure/
> ['12.748046000000/', '12.DD365F000000/', '81.05412A000000/', 'bus.0/',
> 'settings/', 'system/', 'statisti
> see: 12.748046000000/
> addSensor( 12.748046000000/ )
> Exception RuntimeError: 'maximum recursion depth exceeded in
> __subclasscheck__' in <type 'exceptions.Att
> ERROR: Sensor Initialization [12.748046000000/]
> see: 12.DD365F000000/
> addSensor( 12.DD365F000000/ )
> Exception RuntimeError: 'maximum recursion depth exceeded in
> __subclasscheck__' in <type 'exceptions.Att
> ERROR: Sensor Initialization [12.DD365F000000/]
> see: 81.05412A000000/
> addSensor( 81.05412A000000/ )
> Exception RuntimeError: 'maximum recursion depth exceeded in
> __subclasscheck__' in <type 'exceptions.Att
> see: bus.0/
> addSensor( bus.0/ )
> Exception RuntimeError: 'maximum recursion depth exceeded in
> __subclasscheck__' in <type 'exceptions.Att
> Error in addSensor(bus.0/)
> see: settings/
> addSensor( settings/ )
> Exception RuntimeError: 'maximum recursion depth exceeded in
> __subclasscheck__' in <type 'exceptions.Att
> Error in addSensor(settings/)
> see: system/
> addSensor( system/ )
> Exception RuntimeError: 'maximum recursion depth exceeded in
> __subclasscheck__' in <type 'exceptions.Att
> Error in addSensor(system/)
> see: statistics/
> addSensor( statistics/ )
> Exception RuntimeError: 'maximum recursion depth exceeded in
> __subclasscheck__' in <type 'exceptions.Att
> Error in addSensor(statistics/)
> see: structure/
> addSensor( structure/ )
> Exception RuntimeError: 'maximum recursion depth exceeded in
> __subclasscheck__' in <type 'exceptions.Att
> Error in addSensor(structure/)
> see: alarm/
> addSensor( alarm/ )
> Exception RuntimeError: 'maximum recursion depth exceeded in
> __subclasscheck__' in <type 'exceptions.Att
> Error in addSensor(alarm/)
> OneWire Network Initialized
> Exception RuntimeError: 'maximum recursion depth exceeded while
> calling a Python object' in <type 'excep
> Exception RuntimeError: 'maximum recursion depth exceeded while
> calling a Python object' in <type 'excep
> Exception RuntimeError: 'maximum recursion depth exceeded while
> calling a Python object' in <type 'excep
> ^Ccleaning up
> Traceback (most recent call last):
> File "./casas_OneWireAgent.py", line 375, in <module>
> mycon.finish()
> File "./casas_OneWireAgent.py", line 274, in finish
> self.xmpp.disconnect()
> File "/usr/local/CASAS/casas/xmpp.py", line 122, in disconnect
> self.reactor.stop()
> File "/usr/lib/python2.6/site-packages/twisted/internet/base.py",
> line 553, in stop
> "Can't stop reactor that isn't running.")
> twisted.internet.error.ReactorNotRunning: Can't stop reactor that isn't
> running.
> -------------
> Failure occurred at new = ow.Sensor(newsensor);
>
> class Sensors:
> def __init__(self):
> self.data = dict()
> self.valid = ["DS2406","DS18B20","DS2450"]
> self.publish = None
> return
>
> def addSensor(self, sensor):
> print "addSensor( %s )" % sensor
> newsensor = "/%s" % sensor[:-1]
> try:
> new = ow.Sensor(newsensor)
> except:
> print "Error in addSensor(%s)" % sensor
> return
> <snip>
>
> Any suggestions on this?
>
> Thanks!
> --Jim
>
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