相关疑难解决方法(0)

这段代码:

import time
for i in range(10):
    print(i)
    time.sleep(.5)

使我的电脑挂起5秒钟,然后打印0-9,而不是每半秒打印一个数字.难道我做错了什么？

此代码按预期工作.输出:

Loading 
Loading.
Loading..
Loading...

码:

done = False
count = 0

while not done:
    print '{0}\r'.format("Loading"),
    time.sleep(0.25)
    print '{0}\r'.format("Loading."),
    time.sleep(0.25)
    print '{0}\r'.format("Loading.."),
    time.sleep(0.25)
    print '{0}\r'.format("Loading..."),
    time.sleep(0.25)
    count += 1
    if count == 5:
        done = True

而这段代码没有.输出:

Loading.
Loading...

码:

done = False
count = 0

while not done:
    print '{0}\r'.format("Loading"),
    time.sleep(0.125)
    print '{0}\r'.format("Loading."),
    time.sleep(0.125)
    print '{0}\r'.format("Loading.."),
    time.sleep(0.125)
    print '{0}\r'.format("Loading..."),
    time.sleep(0.125)
    count += 1
    if count == 5:
        done = True

为什么时间函数似乎跳过每一个print语句,如果它低于0.25？