I am trying to figure out why I get an UnboundLocalError in my pygame application, Table Wars. Here is a summary of what happens:
The variables, REDGOLD
, REDCOMMAND
, BLUEGOLD
and BLUECOMMAND
, are initialised as global variables:
#Red Stat Section
REDGOLD = 50
REDCOMMAND = 100
#Blue Stat Section
BLUEGOLD = 50
BLUECOMMAND = 100
def main():
[...]
global REDGOLD
global REDCOMMAND
global BLUEGOLD
global BLUECOMMAND
This works when spawning units within the main loop, subtracting funds to spawn units.
Right now, I am trying to set up a system so that when a unit dies, the killer refunds the victim's COMMAND
and earns GOLD
based on what he killed:
class Red_Infantry(pygame.sprite.Sprite):
def __init__(self, screen):
[...]
self.reward = 15
self.cmdback = 5
[...]
def attack(self):
if self.target is None: return
if self.target.health <= 0:
REDGOLD += self.target.reward #These are the problem lines
BLUECOMMAND += self.target.cmdback #They will cause the UnboundLocalError
#when performed
self.target = None
if not self.cooldown_ready(): return
self.target.health -= self.attack_damage
print "Target's health: %d" % self.target.health
This works right up until the unit dies. Then this happens:
Traceback (most recent call last):
File "C:UsersOventoasterDesktopGamesTable WarsTable Wars.py", line 606, in <module>
main()
File "C:UsersOventoasterDesktopGamesTable WarsTable Wars.py", line 123, in main
RedTeam.update()
File "C:Python27libsite-packagespygamesprite.py", line 399, in update
for s in self.sprites(): s.update(*args)
File "C:UsersOventoasterDesktopGamesTable WarsTable Wars.py", line 304, in update
self.attack()
File "C:UsersOventoasterDesktopGamesTable WarsTable Wars.py", line 320, in attack
REDGOLD += self.target.reward
UnboundLocalError: local variable 'REDGOLD' referenced before assignment
How do I get the global variables mentioned above to change with the attack
block? If it helps, I am using Pygame 2.7.x, so nonlocal
won't work :/
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