Homework map error message

map__.pyde

def setup():
     size(800,375)
     global mountainsImage
     global hillsImage
     global foregroundImage
     global princesspeachImage
     global moonImage
mountainsImage = loadImage("week03-mountains.png")
hillsImage = loadImage("week03-hills.png")
foregroundImage = loadImage("week03-foreground.png")
princesspeachImage =loadImage("princesspeach.png")
moonImage = loadImage("week03-moon.png")
def draw():
    rg = map(mouseX, 0,width, 155,10)
    b = map(mouseX, 0,width, 255,50)
    background(rg,rg,b)

mtnX=map(mouseX,0,200,0,-20)
image(mountainsImage, mtnX, 50)

hillsX = map(mouseX, 0, width, -20,-200)
image(hillsImage, hillsX, 250)

fgX = map(mouseX, 0, width, 0, -2000)
image(foregroundImage, fgX, 225)

    

sketch.properties

mode=Python
mode.id=jycessing.mode.PythonMode

It keeps saying mouseX not defined. When I try to run the code and I don't know why? @rors
NameError: name 'mouseX' is not defined

Hi Sasha. Looks like you have some issues with your indentation (the spaces at the start of each line).

Highlight lines 18-15 and press the TAB key. That should indent all of those lines to align with indentation of your draw() block. That should fix the mouseX error, but then I suspect you'll see another error message.

You also need to indent your loadImage() lines, i.e. lines 8-12. So again highlight those lines and hit TAB key to indent them.

If you try running the code at this point you'll get an error message that says "unindent does not match any outer indentation level". The issue here is that the first few lines of your setup() block are using 5 spaces, but Python Processing by default uses 4 spaces – i.e. when you hit TAB it indents with 4 spaces. You can actually use whichever you'd like – any number of spaces are valid for indentation, but you have to be consistent. And since the Python Processing default is 4, I would recommend / request that you use that. So, go through lines 2-7 and delete that extra space so each line starts with 4 spaces.

If you do all that and try running it I think it should work!

Good luck. Let me know if you get stuck.

Hi Sasha. Looks like you have some issues with your indentation (the spaces at the start of each line).

Highlight lines 18-15 and press the TAB key. That should indent all of those lines to align with indentation of your draw() block. That should fix the mouseX error, but then I suspect you'll see another error message.

You also need to indent your loadImage() lines, i.e. lines 8-12. So again highlight those lines and hit TAB key to indent them.

If you try running the code at this point you'll get an error message that says "unindent does not match any outer indentation level". The issue here is that the first few lines of your setup() block are using 5 spaces, but Python Processing by default uses 4 spaces – i.e. when you hit TAB it indents with 4 spaces. You can actually use whichever you'd like – any number of spaces are valid for indentation, but you have to be consistent. And since the Python Processing default is 4, I would recommend / request that you use that. So, go through lines 2-7 and delete that extra space so each line starts with 4 spaces.

If you do all that and try running it I think it should work!

Good luck. Let me know if you get stuck.

I did all that but its still not working I'm getting this error message instead
NullPointerException
at processing.core.PGraphics.image(PGraphics.java:3814)
at processing.core.PApplet.image(PApplet.java:12813)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.python.core.PyReflectedFunction.call(PyReflectedFunction.java:188)
at org.python.core.PyReflectedFunction.call(PyReflectedFunction.java:206)
at org.python.core.PyObject.call(PyObject.java:534)
at org.python.core.PyObject.call(PyObject.java:540)
at org.python.core.PyMethod.call(PyMethod.java:171)
at org.python.pycode.pyx11.draw$2(map_.pyde:31)
at org.python.pycode.pyx11.call_function(map_.pyde)
at org.python.core.PyTableCode.call(PyTableCode.java:171)
at org.python.core.PyBaseCode.call(PyBaseCode.java:125)
at org.python.core.PyFunction.call(PyFunction.java:403)
at org.python.core.PyFunction.call(PyFunction.java:398)
at jycessing.PAppletJythonDriver.draw(Unknown Source)
at processing.core.PApplet.handleDraw(PApplet.java:2482)
at processing.awt.PSurfaceAWT$12.callDraw(PSurfaceAWT.java:1547)
at processing.core.PSurfaceNone$AnimationThread.run(PSurfaceNone.java:313)

NullPointerException can be a tough one to debug because I would say that is one of the least informative error messages that you can get.

In this case, my guess is that one or more of the image files that you're referencing by name on lines 8-12 is missing from your sketch folder. Can you confirm that all 5 image files are present in your sketch folder and the the filenames precisely match the filenames that you are using in your code? (If you're unsure how to confirm this, from within Processing you can go to the menu and click Sketch > Show Sketch folder, or type ⌘K, then look for the files in the sketch folder, and also look inside the folder named data.)

If any of the files are missing or the names are different, either add them, rename them, or correct the filename in your code.

If you're sure all the files are in there with the same filenames that you're using, please create a new Gist and tag me in that, as I'd like to have a look at the code as you've updated it.

Let me know if that works!

NullPointerException can be a tough one to debug because I would say that is one of the least informative error messages that you can get.

In this case, my guess is that one or more of the image files that you're referencing by name on lines 8-12 is missing from your sketch folder. Can you confirm that all 5 image files are present in your sketch folder and the the filenames precisely match the filenames that you are using in your code? (If you're unsure how to confirm this, from within Processing you can go to the menu and click Sketch > Show Sketch folder, or type ⌘K, then look for the files in the sketch folder, and also look inside the folder named data.)

If any of the files are missing or the names are different, either add them, rename them, or correct the filename in your code.

If you're sure all the files are in there with the same filenames that you're using, please create a new Gist and tag me in that, as I'd like to have a look at the code as you've updated it.

Let me know if that works!

Yes thank u that ended up working !!