[Tutor] exercise with classes

[Nate Lastname]

Hey Tonu,

The problem is that in your statement definition, you are not
including the self argument.  Your definition needs to be something
like:
def dolt(self):
   # Do stuff.
For more info on the self keyword, see
http://docs.python.org/tutorial/classes.html, section 9.3.2.

On 2/6/12, Tonu Mikk <tmikk at umn.edu> wrote:
> Alan, thanks for explaining about passing objects to classes.  This is an
> important concept for me to understand.
>
> I tried running the code, but run into an error that I could not resolve:
>
> TypeError: doIt() takes no arguments (1 given).
>
> Tonu
>
> On Thu, Feb 2, 2012 at 7:09 PM, Alan Gauld <alan.gauld at btinternet.com>wrote:
>
>> On 02/02/12 17:36, Tonu Mikk wrote:
>>
>>  So far I have searched for info on how to pass variables from one class
>>> to another and have been able to create a small two class program
>>> (attached).   But I seem unable to generalize from here and apply this
>>> to the game exercise.  What would you suggest for me to try next?
>>>
>>
>> Remember that OOP is about creating objects from classes.
>> You can pass an object to another rather than just the
>> variables, in fact its preferable!
>>
>> Also remember that you can create many objects from one class.
>> So just because you have one Room class doesn't mean you are
>> stuck with one room object. You can have many and each can
>> be connected to another.
>>
>> You can get rooms to describe themselves, you can enter a room.
>> You might even be able to create new rooms or destroy existing ones. These
>> actions can all be methods of your Room class.
>>
>> Here is an example somewhat like yours that passes objects:
>>
>> class Printer:
>>   def __init__(self,number=0):
>>      self.value = number
>>   def sayIt(self):
>>      print self.value
>>
>> class MyApp:
>>   def __init__(self, aPrinter = None):
>>       if aPrinter == None:     # if no object passed create one
>>          aPrinter = Printer()
>>       self.obj = aPrinter      # assign object
>>   def doIt()
>>       self.obj.sayIt()         # use object
>>
>> def test()
>>   p = Printer(42)
>>   a1  MyApp()
>>   a2 = MyApp(p)   # pass p object into a2
>>   a1.doIt()   # prints default value = 0
>>   a2.doIt()   # prints 42, the value of p
>>
>> test()
>>
>> HTH,
>>
>> --
>> Alan G
>> Author of the Learn to Program web site
>> http://www.alan-g.me.uk/
>>
>>
>> ______________________________**_________________
>> Tutor maillist  -  Tutor at python.org
>> To unsubscribe or change subscription options:
>> http://mail.python.org/**mailman/listinfo/tutor<http://mail.python.org/mailman/listinfo/tutor>
>>
>
>
>
> --
> Tonu Mikk
> Disability Services, Office for Equity and Diversity
> 612 625-3307
> tmikk at umn.edu
>


-- 
My Blog - Defenestration Coding

http://defenestrationcoding.wordpress.com/