Styjun

I'm doing a class to put inside all commands about keyboard of pygame, at least all that I need, but when I use if or else being equals to a "variable" I want to define later, it returns a error telling me it isn't defined.

I do not know enough to say in technical therms, sorry by mistakes. I started using button as a key() argument, and I got the same error, then I tried using __init__() but I can use it yet (not sure how), then I made in this way...

class control():
 def button(self, button):
 self.button = button
 def exit(self):
 if event.type == pygame.QUIT:
 pygame.quit()
 def key(self, axis, speed):
 if event.type == pygame.KEYDOWN:
 if event.key == self.button:
 axis = 0
 axis = speed


ctrl = control()
w = control().button(K_w)
s = control(K_s)
UP = control(K_UP)
DOWN = control(K_DOWN)


while True:
 for event in pygame.event.get():
 ctrl.exit() 
 w.key(y1, -5)
 s.key(y1, +5)
 UP.key(y2, -5)
 DOWN.key(y2, +5)

 File "C:/Users/Smith/PycharmProjects/untitled/venv/test0002.py", line 25, in <module>
 w = control().button(K_w)
NameError: name 'K_w' is not defined

I want to use the key function to define button, so I could take it later for every keyboard input instead write it all again each time.

The error message

name 'K_w' is not defined

occures, bcause you've forgotten the module namespace.

The name of the constant is pygame.K_w rather than K_w. The constants are placed in the pygame module namespace.

Either use the full name of the constant:

w = control().button(pygame.K_w)

or import the pygame constants See pygame.locals

from pygame.locals import *

# [...]

w = control().button(K_w)

Further the variables w is never defined, because control() does generate the object, but button() doesn't return any value. The method button should return self:

class control():
 def button(self, button):
 self.button = button
 return self

But I recommend to implement a constructor in the class control rather than the method button (Of course you can do both):

class control():
 def __init__(self, button=0):
 self.button = button

ctrl = control()
w = control(K_w)
s = control(K_s)
UP = control(K_UP)
DOWN = control(K_DOWN)

The method key has to return the new value of the parameter axis:

class control():

 # [...]

 def key(self, axis, speed):
 if event.type == pygame.KEYDOWN:
 if event.key == self.button:
 axis = speed
 return axis

y1, y2 = 0, 0
while True:
 for event in pygame.event.get():
 ctrl.exit() 
 y1 = w.key(y1, -5)
 y1 = s.key(y1, +5)
 y2 = UP.key(y2, -5)
 Y2 = DOWN.key(y2, +5)