[Tutor] Importing modules/classes

[Hans Dushanthakumar]

Me again :)

Just to make sure that I understand it right, 
  1) the __init__ method in a class is invoked when a object is
instantiated from a class
  2) the run method is invoked when a class derived from
"threading.Thread" is "start"ed
Is that right?

The snippet below,

----><------

import threading

class show_num(threading.Thread):

    def __init__(self, num):
        print "__init__: Num = ", num
        
    def run(self):
        print "run"

show_num_thread = show_num(742)
show_num_thread.start()
 
---><-----

Throws an error

>>> 
__init__: Num =  742

Traceback (most recent call last):
  File "H:/Docs/PyScripts/test_thread_1.py", line 12, in -toplevel-
    show_num_thread.start()
AssertionError: Thread.__init__() not called
>>> 

Which __init__ method is it referring to?


Thanks in advance for your help (and time). U guys are awesome :)


-----Original Message-----
From: Danny Yoo [mailto:dyoo at hkn.eecs.berkeley.edu] 
Sent: Thursday, 25 August 2005 12:17 p.m.
To: Hans Dushanthakumar
Cc: Tutor
Subject: Re: [Tutor] Importing modules/classes



> class dummy_class:
>     def __init__(self):
>         print "__init__"
>
>     def run(self):
>         print "run"
>
>
> Now, I have another file test_dummy.py, which only has the foll 2 
> lines
>
> import dummy_class
> d=dummy_class()


Hi Hans,

In Python, modules are containers.  They can contain possibly more than
one thing, so you need to make sure to fully qualify the class:

    import dummy_class
    d = dummy_class.dummy_class()

Does this make sense?