Re: Strange error in Python code

I have never seen any method of initializing vars through the call signature 
only.

Are you certain you are remembering correctly?  And if so, can you give an 
example?

Richard
  ----- Original Message ----- 
  From: Storm Dragon 
  To: programmingblind@xxxxxxxxxxxxx 
  Sent: Sunday, December 13, 2009 9:49 AM
  Subject: RE: Strange error in Python code


  Hi,
  I am very confused.  I thought the vars were getting initialized in the 
__init__(self, now = time.time(), clicks = 1): part.  That's why I had pass in 
that method.  However, your suggestion fixed the problem I was having.  I had 
to move both variables though.  So now it reads:
      def __init__(self):
          self.clicks = 0
          self.now = time.time()
  The thing that confuses me is I have written code with variables declared in 
the () before and they worked.  Why would this time be different?
  Thanks
  Storm



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  On Sun, 2009-12-13 at 12:30 -0500, Ken Perry wrote: 


     

    You need to put self.clicks =0 in the __init__ function because you’re 
trying to do this

     

    None+=1

     

    You have to initialize it first 

     

     

     If you were just setting it like

     

    Self.clicks=0 

     

    Then you could do it in the function but that would not be what you want.  
So initialize it and your done.

     

    Note you don’t need __init__ if you are just doing pass

     

     

     


    From: programmingblind-bounce@xxxxxxxxxxxxx 
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Storm Dragon
    Sent: Sunday, December 13, 2009 11:26 AM
    To: programmingblind@xxxxxxxxxxxxx
    Subject: Re: Strange error in Python code





    Hi,
    Lol it seems so obvious now. Forgetting to put self.variable can be 
detrimental.
    I got all of that fixed and am still getting an error about no attribute 
called now, but it is there, I double checked.  Here's the revised code:
    import time
    class countPresses:
        def __init__(self, now = time.time(), clicks = 1):
            pass

        def clickCount(self):
            if time.time() <= self.now + 0.75:
                self.clicks += 1
            self.now = time.time()
            if self.clicks > 2: self.clicks = 1
            return self.clicks

    test = countPresses()
    print str(test.clickCount())
    print str(test.clickCount())

           


 
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Thoughts of a Dragon:
http://www.stormdragon.us/
What color dragon are you?
http://quizfarm.com/quizzes/new/alustriel07/what-color-dragon-would-you-be/
 

    On Sun, 2009-12-13 at 07:30 -0800, R Dinger wrote:



     


      Your calls to clickCount do not have parens e.g. clickCount(), which is 
required for a function call.  Also you have an undefined local variable in 
click count named now, which is used prior to having a value. 

        

      Richard 


        ----- Original Message ----- 

        From: Storm Dragon 

        To: programmingblind@xxxxxxxxxxxxx 

        Sent: Sunday, December 13, 2009 6:15 AM 

        Subject: Strange error in Python code 

         

        Hi,
        I may have gone about this the wrong way. I wanted a simple way to tell 
if a button has been pressed twice.  My class gives a strange error though.  I 
wrote a quick bit of code to test it.  It just calls the method twice in 
succession so it should get 1 then 2 for output.  Instead, it says:
        <bound method countPresses.clickCount of <__main__.countPresses 
instance at 0x7f0a97e78c68>
        Here's the code:
        import time
        class countPresses:
            def __init__(self, clicks = 1, now = time.time()):
                pass

            def clickCount(self):
                if now + 0.75 >= time.time():
                    self.clicks += 1
                now = time.time()
                if self.clicks > 2: self.clicks = 1
                return self.clicks

        test = countPresses()
        print str(test.clickCount)
        print str(test.clickCount)

        Thanks
        Storm

               


 
-- 
Thoughts of a Dragon:
http://www.stormdragon.us/
What color dragon are you?
http://quizfarm.com/quizzes/new/alustriel07/what-color-dragon-would-you-be/

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