Python 验证码生产程序和进度条程序

#验证码程序

import random

ran = ""
for i in range(4):
value = random.randint(0,4)
if value == i :
ran += str(random.randint(0,9))
else:
ran += chr(random.randint(65,90))
print (ran)

import sys
import time

fileSize = 780
#print (type(fileSize))
tranSpeed = 36.2
tranTime = int(fileSize/tranSpeed)
while tranTime >0:
# print (tranTime)
sys.stdout.write(">")
sys.stdout.flush()     #默认数据输出前先放在缓存中，通过flush实现不放入缓存
time.sleep(1)
tranTime -=1