这个作品是基于Python3和bext模块开发的，所以需要安装bext模块
没有的可以在Windows的Command Prompt或mac和Linux的Terminal输入pip install bext（Python3.4中自带了pip,没有的可以下个新版Python或
在Linux上输入sudo apt-get install python3-pip或sudo yum install python3-pip）
注：bext模块不能再IDLE或PyCharm等IDE中运行，必须在终端或命令提示符输入python [你的python文件名，如fish.py]或python3 【python文件名】
并且需要用cd(change Dictionary)命令切换到python文件在的文件夹，如在Windows上：
C:\Users\Admin>cd D:\python\
D:\python>python fish.py
话不多说，上代码：
import random, sys, time
import bext
WIDTH, HEIGHT = bext.size()
WIDTH -= 1
NUM_KELP = 2
NUM_FISH = 10
NUM_BUBBLERS = 1
FRAMES_PER_SECOND = 4
FISH_TYPES = [
{'right': ['><>'], 'left': ['<><']},
{'right': ['>||>'], 'left': ['<||<']},
{'right': ['>))>'], 'left': ['<[[<']},
{'right': ['>||o', '>||.'], 'left': ['o||<', '.||<']},
{'right': ['>))o', '>)).'], 'left': ['o[[<', '.[[<']},
{'right': ['>-==>'], 'left': ['<==-<']},
{'right': [r'>\\>'], 'left': ['<//<']},
{'right': ['><)))*>'], 'left': ['<*(((><']},
{'right': ['}-[[[*>'], 'left': ['<*]]]-{']},
{'right': [']-<)))b>'], 'left': ['<d(((>-[']},
{'right': ['><XXX*>'], 'left': ['<*XXX><']},
{'right': ['_.-._.-^=>', '.-._.-.^=>',
'-._.-._^=>', '._.-._.^=>'],
'left': ['<=^-._.-._', '<=^.-._.-.',
'<=^_.-._.-', '<=^._.-._.']},
]
LONGEST_FISH_LENGTH = 10
LEFT_EDGE = 0
RIGHT_EDGE = WIDTH - 1 - LONGEST_FISH_LENGTH
TOP_EDGE = 0
BOTTOM_EDGE = HEIGHT - 2
def main():
global FISHES, BUBBLERS, BUBBLES, KELPS, STEP
bext.bg('black')
bext.clear()
FISHES = []
for i in range(NUM_FISH):
FISHES.append(generateFish())
BUBBLERS = []
for i in range(NUM_BUBBLERS):
BUBBLERS.append(random.randint(LEFT_EDGE, RIGHT_EDGE))
BUBBLES = []
KELPS = []
for i in range(NUM_KELP):
kelpx = random.randint(LEFT_EDGE, RIGHT_EDGE)
kelp = {'x': kelpx, 'segments': []}
for i in range(random.randint(6, HEIGHT - 1)):
kelp['segments'].append(random.choice(['(', ')']))
KELPS.append(kelp)
STEP = 1
while True:
simulateAquarium()
drawAquarium()
time.sleep(1 / FRAMES_PER_SECOND)
clearAquarium()
STEP += 1
def getRandomColor():
"""Return a string of a random color."""
return random.choice(('black', 'red', 'green', 'yellow', 'blue',
'purple', 'cyan', 'white'))
def generateFish():
"""Return a dictionary that represents a fish."""
fishType = random.choice(FISH_TYPES)
colorPattern = random.choice(('random', 'head-tail', 'single'))
fishLength = len(fishType['right'][0])
if colorPattern == 'random':
colors = []
for i in range(fishLength):
colors.append(getRandomColor())
if colorPattern == 'single' or colorPattern == 'head-tail':
colors = [getRandomColor()] * fishLength
if colorPattern == 'head-tail':
headTailColor = getRandomColor()
colors[0] = headTailColor
colors[-1] = headTailColor
fish = {'right': fishType['right'],
'left': fishType['left'],
'colors': colors,
'hSpeed': random.randint(1, 6),
'vSpeed': random.randint(5, 15),
'timeToHDirChange': random.randint(10, 60),
'timeToVDirChange': random.randint(2, 20),
'goingRight': random.choice([True, False]),
'goingDown': random.choice([True, False])}
fish['x'] = random.randint(0, WIDTH - 1 - LONGEST_FISH_LENGTH)
fish['y'] = random.randint(0, HEIGHT - 2)
return fish
def simulateAquarium():
"""Simulate the movements in the aquarium for one step."""
global FISHES, BUBBLERS, BUBBLES, KELP, STEP
for fish in FISHES:
if STEP % fish['hSpeed'] == 0:
if fish['goingRight']:
if fish['x'] != RIGHT_EDGE:
fish['x'] += 1
else:
fish['goingRight'] = False
fish['colors'].reverse()
else:
if fish['x'] != LEFT_EDGE:
fish['x'] -= 1
else:
fish['goingRight'] = True
fish['colors'].reverse()
fish['timeToHDirChange'] -= 1
if fish['timeToHDirChange'] == 0:
fish['timeToHDirChange'] = random.randint(10, 60)
fish['goingRight'] = not fish['goingRight']
if STEP % fish['vSpeed'] == 0:
if fish['goingDown']:
if fish['y'] != BOTTOM_EDGE:
fish['y'] += 1
else:
fish['goingDown'] = False
else:
if fish['y'] != TOP_EDGE:
fish['y'] -= 1 #
else:
fish['goingDown'] = True
fish['timeToVDirChange'] -= 1
if fish['timeToVDirChange'] == 0:
fish['timeToVDirChange'] = random.randint(2, 20)
fish['goingDown'] = not fish['goingDown']
for bubbler in BUBBLERS:
if random.randint(1, 5) == 1:
BUBBLES.append({'x': bubbler, 'y': HEIGHT - 2})
for bubble in BUBBLES:
diceRoll = random.randint(1, 6)
if (diceRoll == 1) and (bubble['x'] != LEFT_EDGE):
bubble['x'] -= 1
elif (diceRoll == 2) and (bubble['x'] != RIGHT_EDGE):
bubble['x'] += 1
bubble['y'] -= 1
for i in range(len(BUBBLES) - 1, -1, -1):
if BUBBLES[i]['y'] == TOP_EDGE:
del BUBBLES[i]
for kelp in KELPS:
for i, kelpSegment in enumerate(kelp['segments']):
if random.randint(1, 20) == 1:
if kelpSegment == '(':
kelp['segments'][i] = ')'
elif kelpSegment == ')':
kelp['segments'][i] = '('
def drawAquarium():
"""Draw the aquarium on the screen."""
global FISHES, BUBBLERS, BUBBLES, KELP, STEP
bext.fg('white')
bext.goto(0, 0)
print('Fish Tank, Ctrl-C to quit.', end='')
bext.fg('white')
for bubble in BUBBLES:
bext.goto(bubble['x'], bubble['y'])
print(random.choice(('o', 'O')), end='')
for fish in FISHES:
bext.goto(fish['x'], fish['y'])
if fish['goingRight']:
fishText = fish['right'][STEP % len(fish['right'])]
else:
fishText = fish['left'][STEP % len(fish['left'])]
for i, fishPart in enumerate(fishText):
bext.fg(fish['colors'][i])
print(fishPart, end='')
bext.fg('green')
for kelp in KELPS:
for i, kelpSegment in enumerate(kelp['segments']):
if kelpSegment == '(':
bext.goto(kelp['x'], BOTTOM_EDGE - i)
elif kelpSegment == ')':
bext.goto(kelp['x'] + 1, BOTTOM_EDGE - i)
print(kelpSegment, end='')
bext.fg('yellow')
bext.goto(0, HEIGHT - 1)
print(chr(9617) * (WIDTH - 1), end='')
sys.stdout.flush()
def clearAquarium():
global FISHES, BUBBLERS, BUBBLES, KELP
# Draw the bubbles:
for bubble in BUBBLES:
bext.goto(bubble['x'], bubble['y'])
print(' ', end='')
for fish in FISHES:
bext.goto(fish['x'], fish['y'])
print(' ' * len(fish['left'][0]), end='')
for kelp in KELPS:
for i, kelpSegment in enumerate(kelp['segments']):
bext.goto(kelp['x'], HEIGHT - 2 - i)
print(' ', end='')
sys.stdout.flush()
if __name__ == '__main__':
try:
main()
except KeyboardInterrupt:
sys.exit()
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