pygame.event.get()
刚学习python+pygame就遇到了个棘手的问题——pygame.event.get()
这是官方注释
pygame.event. get ( )
get events from the queue
get() -> Eventlist
get(type) -> Eventlist
get(typelist) -> Eventlist
This will get all the messages and remove them from the queue. If a type or sequence of types is given only those messages will be removed from the queue.
If you are only taking specific events from the queue, be aware that the queue could eventually fill up with the events you are not interested.
写进代码里思路就乱了，比如这个例子background_image_filename = 'sushiplate.jpg'
import pygame
from pygame.locals import *
from sys import exit
pygame.init()
screen = pygame.display.set_mode((640, 480), 0, 32)
background = pygame.image.load(background_image_filename).convert()
x, y = 0, 0
move_x, move_y = 0, 0
while True:
for event in pygame.event.get():
if event.type == QUIT:
exit()
if event.type == KEYDOWN:
#键盘有按下？
if event.key == K_LEFT:
#按下的是左方向键的话，把x坐标减一
move_x = -1
elif event.key == K_RIGHT:
#右方向键则加一
move_x = 1
elif event.key == K_UP:
#类似了
move_y = -1
elif event.key == K_DOWN:
move_y = 1
elif event.type == KEYUP:
#如果用户放开了键盘，图就不要动了
move_x = 0
move_y = 0
#计算出新的坐标
x+= move_x
y+= move_y
screen.fill((0,0,0))
screen.blit(background, (x,y))
#在新的位置上画图
pygame.display.update()自己又写了个模拟帮助理解
import pygame,time
pygame.init()
screen = pygame.display.set_mode((640, 480), 0, 32)
pygame.display.update()
clock=pygame.time.Clock()
outclock=pygame.time.Clock()
while True:
tt=0
for event in pygame.event.get():
if event.type == pygame.QUIT:
exit()
print 'infor: ',clock.tick()
print 'time: ',time.time()
print str(event)
tt+=1
pygame.time.delay(200)
print '************************************'
print tt
print 'out: ',outclock.tick()
print 'outtime: ',time.time()
Python 2.7.5 (default, May 15 2013, 22:43:36) [MSC v.1500 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> ================================ RESTART ================================
>>>
infor: 7
time: 1374995035.72
infor: 239
time: 1374995035.96
************************************
2
out: 491
outtime: 1374995036.2
infor: 261
time: 1374995036.21
infor: 239
time: 1374995036.46
************************************
2
out: 504
outtime: 1374995036.71
infor: 263
time: 1374995036.73
infor: 246
time: 1374995036.97
************************************
2
out: 504
outtime: 1374995037.21
infor: 260
time: 1374995037.23
infor: 235
time: 1374995037.47
infor: 251
time: 1374995037.71
infor: 248
time: 1374995037.96
infor: 249
time: 1374995038.21
infor: 242
time: 1374995038.46
infor: 256
time: 1374995038.71
infor: 250
time: 1374995038.96
infor: 243
time: 1374995039.2
infor: 248
time: 1374995039.45
infor: 242
time: 1374995039.69
infor: 245
time: 1374995039.94
infor: 251
time: 1374995040.19
infor: 242
time: 1374995040.43
infor: 250
time: 1374995040.68
************************************
15
out: 3728
outtime: 1374995040.94
infor: 286
time: 1374995040.97
infor: 249
time: 1374995041.22
infor: 244
time: 1374995041.46
infor: 249
time: 1374995041.71
infor: 243
time: 1374995041.95
infor: 242
time: 1374995042.19
infor: 247
time: 1374995042.44
infor: 247
time: 1374995042.69
infor: 245
time: 1374995042.93
infor: 242
time: 1374995043.18
infor: 250
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infor: 242
time: 1374995043.67
infor: 251
time: 1374995043.92
infor: 247
time: 1374995044.16
infor: 242
time: 1374995044.4
infor: 247
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infor: 244
time: 1374995044.9
infor: 249
time: 1374995045.15
infor: 246
time: 1374995045.39
infor: 251
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infor: 246
time: 1374995045.89
infor: 251
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infor: 241
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infor: 246
time: 1374995046.62
infor: 240
time: 1374995046.87
infor: 249
time: 1374995047.12
infor: 251
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infor: 243
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infor: 249
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time: 1374995049.07
infor: 250
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infor: 244
time: 1374995049.57
infor: 241
time: 1374995049.81
infor: 242
time: 1374995050.05
infor: 242
time: 1374995050.29
infor: 242
time: 1374995050.54
infor: 249
time: 1374995050.79
infor: 243
time: 1374995051.03
infor: 247
time: 1374995051.28
infor: 243
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infor: 242
time: 1374995051.76
infor: 247
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infor: 243
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infor: 248
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infor: 242
time: 1374995052.74
infor: 249
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infor: 241
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infor: 242
time: 1374995053.47
infor: 246
time: 1374995053.71
infor: 243
time: 1374995053.96
infor: 247
time: 1374995054.21
infor: 245
time: 1374995054.45
infor: 248
time: 1374995054.7
infor: 242
time: 1374995054.94
infor: 252
time: 1374995055.19
infor: 242
time: 1374995055.44
infor: 253
time: 1374995055.69
infor: 240
time: 1374995055.93
infor: 244
time: 1374995056.17
infor: 246
time: 1374995056.42
infor: 244
time: 1374995056.67
infor: 250
time: 1374995056.91
infor: 245
time: 1374995057.16
infor: 242
time: 1374995057.4
infor: 241
time: 1374995057.64
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infor: 243
time: 1374995058.12
infor: 246
time: 1374995058.37
infor: 244
time: 1374995058.62
infor: 248
time: 1374995058.86
infor: 245
time: 1374995059.11
infor: 240
time: 1374995059.35
infor: 245
time: 1374995059.59
infor: 242
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infor: 242
time: 1374995060.08
infor: 247
time: 1374995060.33
infor: 245
time: 1374995060.57
infor: 247
time: 1374995060.82
infor: 241
time: 1374995061.06
infor: 249
time: 1374995061.31
infor: 247
time: 1374995061.56
infor: 255
time: 1374995061.81
infor: 246
time: 1374995062.06
infor: 245
time: 1374995062.3
infor: 247
time: 1374995062.55
infor: 242
time: 1374995062.79
infor: 249
time: 1374995063.04
infor: 249
time: 1374995063.29
infor: 250
time: 1374995063.54
infor: 243
time: 1374995063.78
************************************
94
out: 23097
outtime: 1374995064.05
************************************
0
out: 48
outtime: 1374995064.09
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out: 37
outtime: 1374995064.12
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outtime: 1374995064.16
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outtime: 1374995064.19
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outtime: 1374995064.26
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outtime: 1374995064.29
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outtime: 1374995064.32
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outtime: 1374995064.86
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outtime: 1374995064.94
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outtime: 1374995064.98
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outtime: 1374995065.01
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outtime: 1374995065.05
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outtime: 1374995065.08
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outtime: 1374995065.12
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outtime: 1374995065.18
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outtime: 1374995065.21
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outtime: 1374995065.31
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outtime: 1374995065.35
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outtime: 1374995065.38
>>> 观察发现，pygame.event.get()取走外部输入信息队列的时候是有个时间间隔的，这个间隔和程序本身运行的速度有关系，这里可以通过修改pygame.time.delay()里的值发现。之所以在for in pygame.event.get()循环里加入pygame.time.delay()这一句是因为程序跑的要比你手指输入快得多，现在有了pygame.time.delay()这个神器咱终于可以比程序跑得更快了，只要你以一定的速度输入下去，外部输入信息队列会因为pygame.event.get()不能及时取走而装的很多，当pygame.event.get()终于处理完曾经取走的信息，等待它的又是外部输入信息队列里好大一坨的外部输入信息··· ···
总之，大概就是这个意思