[Tutor] recursion

Michael C mysecretrobotfactory at gmail.com
Mon May 22 17:21:07 EDT 2017

hi all:

oh ya, my function does in fact take no input and doesn't change anything,
and all i wanted to was to call itself a 2nd time, yes, so I solved it a
few hours back ,and it's good enough for me for now :)

Thanks for the response!!!

On Mon, May 22, 2017 at 2:16 PM, Alan Gauld via Tutor <tutor at python.org>

> On 22/05/17 17:11, Michael C wrote:
> > I have a function to return (x,y) value, but sometimes it would naturally
> > unable to return those 2 values properly. I know what recursion is, and I
> > think all I got to do is to call this function a 2nd time and the problem
> > would go away.
> Sorry, but that is too vague to help us in any way.
> Recursion is not about calling the function a second time,
> it is about calling the function from within the same function.
> How or whether that would help solve your problem is not at
> all obvious.
> You need to ideally show us your code or at least give us more
> information about what is going wrong.
> What kind of values are you expecting back?
> What do you mean by "naturally unable to return those"?
> Why not? What does it return instead?
> How are the values being returned(or calculated/obtained)?
> > How do I do recursion? The function basically look like this
> >
> > def return_xy():
> >     blah blah blah
> >     return x,y
> That looks like any function that takes no inputs and returns
> a tuple. It does not help us to help you in any way.
> The fact that it takes no inputs and does not apparently
> modify any state variables means recursion would be pointless
> - in fact it would lead to an infinite loop and lock up your
> program.
> We need more detail, and unless you have a good reason not
> to, you should just show us your code. We are ok with you
> posting anything up to, say, 100 lines long...
> --
> Alan G
> Author of the Learn to Program web site
> http://www.alan-g.me.uk/
> http://www.amazon.com/author/alan_gauld
> Follow my photo-blog on Flickr at:
> http://www.flickr.com/photos/alangauldphotos
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