[Tutor] tuples and mysqldb tables (fwd)

[Danny Yoo]

> Thanks for the debugging help :P - I've edited the error handling line, and
> defined the port_counter above, but I am still not getting any output. I
> have inserted print "scanned: ",port_counter,"\n"
> into the thread, so that should at least print to screen each time the
> thread is ran, regardless of the port being open or closed. Any ideas why
> the thread itself though is not working?
> A cleaner view of the code is here:
> http://deadbeefbabe.org/paste/1672?_nevow_carryover_=1127102735.7127.0.0.10.809800804887
>  Thanks again for the error handling help!

Hi Ed,

There are logically two possible areas where there might be a bug: there
might be a problem in the scanThread class, or there might be a problem in
scan.

Or there could be problems in both.  *grin*

You're still running into some fundamentally basic problems dealing with
variables and how variable scope works.  See:

    http://www.freenetpages.co.uk/hp/alan.gauld/tutclass.htm

and go through the examples there: it should help clarify some of the
confusion you have about maintaining state in a class.

As it stands, there is nothing in the class definition that knows about
what 'ip' or 'port_counter' are: those two aren't parameters of the class
or its methods, nor are they instance variables.




> I have inserted print "scanned: ",port_counter,"\n" into the thread, so
> that should at least print to screen each time the thread is ran,
> regardless of the port being open or closed.

The direct implication here is that scanThread.run() itself is NOT being
executed.  So there's also a problem in scan() that prevents the threads
from getting started in the first place.  I don't understand what you're
trying to do with:

    while threading < MAX_THREADS:
        ...

since 'threading' is the 'threading' module.  Unfortunately, Python won't
treat this as a TypeError, even though it really should be treated as such
(what does it mean for a module to be "smaller" than something else?!)

And MAX_THREADS is undefined.

Are you getting any kind of error messages when you run your program?
I'm a bit confused, because there's so many opportunities here for Python
to tell you that there's a NameError here:  are you seeing those error
messages too?