Pygame (Python Game Development) Tutorial - 37 - randapple Function Video Lecture | Pygame (Python Game Development): Create Awesome Games - Front-End Programming

hey guys what's going on welcome to the
37th pygame tutorial video in this video
we're going to be doing is generating a
function to handle this R and Apple X
and random Y as we saw in the last video
editing this anything within our you
know function here we have to edit in
three different locations which is kind
of a red flag to you that something is
wrong something wrong so what I want to
do is basically we're gonna make a
function to handle this so it's just
these two lines here so I'm gonna go
ahead and highlight this will copy that
and then we're gonna come up to the top
of our script and we're gonna make a new
function right here and we're just gonna
call this define R and apple chin for R
and Apple generation and no parameters
are necessary here and then we just
paste this here and it's always a good
idea to when you do something like this
is make sure all that variables in here
will match up so sometimes what you
might need to do if you've got local
variables is you'll make the function
and then say like Apple thickness not
too long ago Apple thing this was
actually a local variable right it was
in the game the game loop and we could
still work with that if we want and we
would just need to change you know add a
parameter here like object size and pass
the value of apple thickness through
object size and so these being apple
thickness these would be object size but
since apple thickness is like a constant
defined up here we don't have to
actually worry about that so this will
be empty parameters then we see there
and basically the only thing then we've
got display width and display height but
again those are just defined up here so
we've got a function now all we have to
do is we have this function return these
values so have it return brand Apple X
and then R and Apple y
now whenever we want to call this
function and have it return data to us
all we have to do is we say R and Apple
X comma R and Apple y equals R and Apple
gin so R and Apple gen is basically
returning this tuple of ran a black
strand of a wine we can assign that
tuple using on packing to ectis r and x
r and y and this is a full function and
that's all we need to call now so we can
take this will cut this and then we're
going to head down and or a script and
we're gonna find where we're calling
these functions so right here's the
first example
so we can just basically delete that
paste our new function there now we'll
find the other spots I think we have two
more keep scrolling this is old code I'm
gonna go ahead and just delete this now
and I'm using that and we'll find this
highlight that delete paste and then
again here delete paste and that's it
that's the all the places that we're
calling those so let's see if that works
out for us
snake relation C to play let's eat an
apple and sure enough we're seeing that
our Apple is indeed generating in other
locations so that's good so now we're
able to modify our apples
functionalities because we might not end
up changing the size of the apple we
might end up doing a whole host of other
things the bottom line is anytime we
need to modify something within that
functionality we saw that we had to go
through quite a few different locations
it's highly likely that you'll maybe
forget about one of the other locations
so these two it's easy enough but the
initial definition of it wherever that
is up here I think somewhere right it
would be easy to have forgotten about
that one and so on so it's always a good
idea to if you're gonna have variables
at all to obviously have a variable
definition to them so we can change the
variables near the top and we always
know where to find them
but then when you've got a similar block
of code that you find that you're
running in many many places it's best
that we turn that into a function
because making changes to it will
require quite a bit of edits and not
only is it a lot of work you might
forget some spots so now we've got that
function working so we're pretty happy
there and now what we're going to be
doing in the next video is we're gonna
work on adding scoring to our game as
well as pausing to our game because
sometimes users want to be a little
pause so that's what's coming up
hopefully you guys have been enjoying as
always thanks for watching stay tuned to
the next video