问题描述
每次运行我的代码时,都会不断出现以下错误: raise ValueError(“ randrange()的空范围(%d,%d,%d)”%(istart,istop,width) ValueError:randrange()(0,0,0)的空范围
我尝试更改值,但似乎无济于事,我想知道可能是什么问题?代码部分显示如下:
import pygame
vec=pygame.math.Vector2
from os import path
import sys
import random
from random import choice,randrange,uniform
class Mob(pygame.sprite.Sprite):
def __init__(self,game):
self._layer = mob_layer
self.groups = game.all_sprites,game.mobs
pygame.sprite.Sprite.__init__(self,self.groups)
self.game = game
self.image_up = self.game.spritesheet.get_image(566,510,122,139)
self.image_up.set_colorkey(black)
self.image_down = self.game.spritesheet.get_image(568,1534,135)
self.image_down.set_colorkey(black)
self.image = self.image_up
self.rect = self.image.get_rect()
self.rect.centerx = choice([-100,width + 100])
self.vx = randrange(1,4)
if self.rect.centerx > width:
self.vx *= -1
self.rect.y = randrange(height / 2)
self.vy = 0
self.dy = 0.5
Thanks :)
解决方法
randrange
的参数需要是整数值。使用 //
(除法)运算符而不是 /
(除法)运算符:
self.rect.y = randrange(height / 2)
self.rect.y = randrange(height // 2)