[Tutor] [Fwd: Re: trouble with "if"]

[Adam Urbas]

I think I may have figured it out.  I just switched some things around.

On 5/30/07, Adam Urbas <jped.aru at gmail.com> wrote:
> I can't seem to get the type with the parameters to work.  I can get
> def answer(): to work, but not def
> answer(my_first_parameter,my_second_parameter):.  I'm not too
> concerned, as I haven't yet needed to use that.  But, when I use the
> parameter type, it runs without error messages, but doesn't display
> anything.  That's when I'm using your example with my_first_parameter.
>  But when I use:
>
> def answer(40,2):
>     answer=40+2
>     print "Answer:\t", value
> answer()
>
> it says:
>
> There's an error in your program:
> invalid syntax
>
> and then it highlights the first number between the parentheses, like last time.
>
> OK. New topic temporarily... I just completed a portion of my
> radiacir.py program, after much debugging.  I still want to add that
> error message thing that we discussed eariler, but that's a whole
> nother can of worms.  So I'm going to attach it.  This is very
> exciting.  Except, I renamed it and now it doesn't work.  This
> frustrates me.  How could something work one second and then not the
> next.  Oh well, I'll still attach it and if you could help me find the
> problem, that would be nice.
>
> Thanks,
> Au
> On 5/30/07, Brian van den Broek <broek at cc.umanitoba.ca> wrote:
> > Adam Urbas said unto the world upon 05/30/2007 11:01 AM:
> > > I can't exactly show you the error message anymore, because the program is
> > > now screwed up in so many ways that I can't even get it to do the things it
> > > used to.
> > >
> > > It says things like ERROR: Inconsistent indentation detected!
> > > 1) Your indentation is outright incorrect (easy to fix), OR
> > > 2) Your indentation mixes tabs and spaces.  Then it tells me to untabify
> > > everything, which i did and it still gives this message.  I've started
> > > completely over with the exact same indentation and that one works.
> > >
> > > Oh my gosh this gmail is a fricken crack head... none of this stuff was
> > > here
> > > last night.  I have no idea what was going on then, but everything you guys
> > > said is right here.  The plain text is right next to the Check spelling,
> > > the
> > > reply to all is right above send and save now and in the corner near the
> > > little arrow.  Well, it's working now.
> > >
> > > Ok, so if i have a section of code that is:
> > >
> > > answer=(2+3):
> > > print "answer", answer
> > >
> > > so for the code above I would put: (I think I would have to have the two
> > > numbers and the addition thing in there wouldn't I; I saw something like
> > > this on Alan's tutorial last night.)
> > >
> > > def answer(2,3):
> > >    answer=(2+3)
> > >    print "answer",answer
> > >
> > > That is obviously not right.:
> > >
> > > There's an error in your program:
> > > invalid syntax
> > >
> > > when it says that it highlights the 2: def answer(2+3):
> > >
> > > Ok I think I understand these now.  Thanks for the advice.  I have this
> > > now:
> > >
> > > def answer():
> > >    print("answer")
> > > answer()
> > >
> > > It works too, yay!
> > > Thanks,
> > >
> > > Au
> > >
> >
> >
> > Adam,
> >
> > Glad you are sorting out the gmail---in the long run, plain text will
> > make this all much easier than what you had before :-)
> >
> > Your answer function definition above is saying something like this:
> > make answer the name of a function that takes no parameters, and, when
> > called, have it execute a print.
> >
> > This:
> >
> >  > def answer(2,3):
> >  >    answer=(2+3)
> >  >    print "answer",answer
> >
> > doesn't work, as you are trying to set the values of the two
> > parameters to 2 and 3 in the function definition itself. That's not
> > how parameters work. The definition of a function sets the parameters
> > up as named `slots' that function calls will give values to. (There
> > are, as Andre pointed out, more details, but let those aside for now
> > and focus on the simplest cases.)
> >
> > This:
> >
> > def answer():
> >      answer=(2+3)
> >      print "answer",answer
> >
> > would work, but it isn't much different than the code that did work.
> >
> > Try this:
> >
> > def answer(my_first_parameter, my_second_parameter):
> >      value = my_first_parameter + my_second_parameter
> >      print "Answer:\t", value
> >
> > (I wouldn't use the cumbersome names `my_first_parameter', etc. in
> > real code, but perhaps they help keeping track of what is going on in
> > early stages.)
> >
> > That says, in effect, let answer be a function which takes two
> > positional parameters, adds them, and prints the result in an
> > informative way.
> >
> >  >>> answer(40, 2)
> > Answer: 42
> >  >>> answer("A string", " and another string")
> > Answer: A string and another string
> >  >>>
> >
> > These work because the function definition ensures that the first
> > parameter (40, in the first case above) will, as far as the function
> > is concerned, be called my_first_parameter. (Likewise for 2 and
> > my_second_parameter.)
> >
> > Does that help?
> >
> > Brian vdB
> >
>
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: acp.py
Url: http://mail.python.org/pipermail/tutor/attachments/20070530/8d3126fa/attachment.asc