It's working better now. The problem I have left is that I have to set the
channel and volume values in a range (for both I intend for 0-10). I thought
the range() would be the choice, but probably I'm not using it right.
Another one is for the tv.channel to hold a new value instead of just
adding/subtracting the value and the only way I can think how is to use a
list and then have the function replace the value each time. I'm sure there
is a better way though.
http://old.nabble.com/file/p31928968/TV TV
Alan Gauld wrote:
>
>
> "Vincent Balmori" <vincentbalm...@yahoo.com> wrote
>
>> Before I can even start correcting my code this error shows up.
>
> You will find it much easier to write programns if you do
> not write out the whole program and then try to debug it!
> Just write a single method at a time and get that working
> before trying to debug a whole complex aopplication.
>
> This code is fuill of errors whicvh will continually prevent
> you from running the code. I'll highlight a few. But as I
> said in your previous thread, you really need to read
> some more about the basics because your errors reveal
> a deep gap in your understanding of variables, data types
> and their operations. Only once you undertsand that thoroughly
> will you be successful with classes and objects, because
> in OOP you are defining new data types and operations.
> If you can't use the standard types you have little hope
> of using newly defined ones!
>
> Some examples:
>
> class Television(object):
> def __init__(tv, channel = range(0,10), volume = range(0,10)):
> tv.channel = channel
> tv.volume = volume
> def cha(tv, level = 1):
> while 0 >= tv.channel <=10:
>
> Here you store two range objects as your channel and
> volume attributes in init (In Python v 2 these would be
> lists but in Python 3 they are range objects).
> Then in cha() you try to compare them to a number,
> that won't work, they are incompatible types.
> Later you try to increment channel which agaion won't
> work. (And why you only increment channel and never
> decrement is a puzzle - and you ignore the level value
> read from the user?)
>
> Similar applies in volu() except you have two methods,
> one up one down. But you are still trying to apply
> integer operations to range objects.
>
>
> In various places you do this:
>
> if level > 10:
> int(input("\n That's too much! Choose another number?: "))
>
> The user input is read, converted to an int then thrown away.
> You need to store it in a variable.
>
> Finally we come to the error message, it is in main():
>
> def main():
> print(Television(tv.display))
> choice = None Notice you do not create a tv instance. You try to
> print an instance but in creating it you try to passs tv.display to
> the constructor, but tv does not exist aty that point. And even if you
> did succeed the instance would be immediately destroyed again because
> you are not storing it in a variable. You need to go back to basic
> data types and understand that concept. There is clearly something
> missing at the moment since you jkeep making the same mistakes over
> and over again.> thought I had already created the "tv" instance.>
> http://old.nabble.com/file/p31925053/Television Television You defined
> a class. You tried to create an instance of the class inside the print
> statement, but it nevergot that far.Try reading my tutorial topic on
> data - The Raw Materials - and then the OOP topic. Then go back to
> whatever tutorial you are currently following and see if it helps.--
> Alan GauldAuthor of the Learn to Program web
> sitehttp://www.alan-g.me.uk/
>
>
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>
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