There are 2 ways to get the ypos value one is cball.ypos and another is call.getY() both will give u the current ypos.
--nitin On Thu, Aug 26, 2010 at 7:26 AM, Andrew Martin <amartin7...@gmail.com>wrote: > All I want to do is add a line that displays that maximum height the > cannonball reaches. I created a variable zenith to store the highest y > value. I then wanted to compare the current y value of the cannonball to > zenith while the cannonballs y value is greater than zero. If the > cannonballs current y value is greater than zenith, I want to have the > current value replace zenith. Finally, once the cannonball has reaches y = > 0, I wanted the program to write out the value for zenith. > > I want to compare zenith, a floating point number, with the current y > value? I thought the current y value could be retrieved by Projectile.getY. > And how do I call the getY using the instance? > > > > > On Wed, Aug 25, 2010 at 7:24 PM, Alan Gauld <alan.ga...@btinternet.com>wrote: > >> >> "Andrew Martin" <amartin7...@gmail.com> wrote >> >> >> However, when I did so I got this error: "TypeError: unbound method >>> getY() >>> must be called with Projectile instance as first argument (got nothing >>> instead) " >>> >> >> def main(): >>>> angle, vel, h0, time = getInputs() >>>> cball = Projectile(angle, vel, h0) >>>> >>> >> cball is a Projectile instance >> >> >> zenith = 0.0 >>>> while cball.getY() >= 0: >>>> >>> >> So this is fine >> >> >> cball.update(time) >>>> >>> >> >> if Projectile.getY > zenith: >>>> zenith = Projectile.getY() >>>> >>> >> But what are you doing here? >> You are trying to compare the getY method of the class with a floating >> point number? >> Then you call getY using the class rather than the instance? >> I'm confused - and so is Python... >> >> >> -- >> Alan Gauld >> Author of the Learn to Program web site >> http://www.alan-g.me.uk/ >> >> >> _______________________________________________ >> Tutor maillist - Tutor@python.org >> To unsubscribe or change subscription options: >> http://mail.python.org/mailman/listinfo/tutor >> > > > _______________________________________________ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > http://mail.python.org/mailman/listinfo/tutor > >
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