keyPressed function does not work correctly and is not colour coded correctly

[zipferlacke]

The function keyPressed is not correctly marked in colour and does not work as expected. The globally defined variable here pressed cannot be called, the error message: UnboundLocalError: local variable 'pressed' referenced before assignment.

The function keyReleased is colour-correct and works without problems. Here the error message does not appear if the function keyPressed is commented out beforehand.

The variable is defined as follows:

I am using version 3.5.4, on Windows 10.

This is all my code:

add_library('peasycam')


# ---
# Variablen
# ---

global cubeSize
cubeSize = 3

global cube
cube = []

global cam 

global pressed
pressed = False


# ---
# Klassen
# ---

class Cubies:
    def __init__(self, pos, color):
        self.pos = pos
        self.color = color
    
    @property
    def show(self):
        fill(255)
        stroke(0)
        strokeWeight(0.1)
        pushMatrix()
        translate(self.pos[0], self.pos[1], self.pos[2])
        fill(self.color)
        box(1)
        popMatrix()


# --- 
# Funktionen
# ---

def rotateU():
    for i in range(0, len(cube)):
        cubeObject = cube[i]
        if (cubeObject.pos[1] == -1):
            #cubeObject.color = color(0, 0, 255)
            temp = cubeObject.pos[0] 
            cubeObject.pos[0] = cubeObject.pos[2] * -1
            cubeObject.pos[2] = temp * -1
            
            cube[i] = cubeObject 
            
                
def setup():
    fullScreen(P3D)
    
    for x in range(-1, 2):
        for y in range(-1, 2):
            for z in range(-1, 2):
                cube.append(Cubies([x,y,z], color(200,200, 200)))

    cube[2].color = color(255,0,0)
    
    cam = PeasyCam(this, width/2, height/2, 0, 10)
    cam.setMinimumDistance(50)
    cam.setMaximumDistance(1000)


def draw():
    background(255);
    translate(width/2, height/2, 0)
    scale(50);

    for cubeObject in cube:
        cubeObject.show
        
def keyPressed():
    if(key == "k" and not pressed):
        rotateU()
        pressed = True
        
def keyReleased():
    if(key == "k"):
        pressed = False

[tabreturn]

The global pressed at the top of your file is redundant. What you need to add is a global line to the function that must write to the global variable --

pressed = False

...
        
def keyPressed():
    global pressed  # this line is missing in your code
    if(key == "k"):
        pressed = True

There's a keyPressed() method and keyPressed system variable, and the editor cannot distinguish them, hence the odd coloring.