等待动画“……"一遍遍地出现 [英] Wait animation "..." to appear over and over

问题描述

我正在尝试显示一种加载动画，特别是反复出现的三个点.我认为以下方法可行:

I'm trying to display a sort of loading animation, specifically three dots appearing over and over. I thought the below would work:

import time, sys

for i in range(9):
    time.sleep(0.2)
    x = i % 4
    sys.stdout.write("." * x)
    sys.stdout.flush()

然而，它所做的只是逐渐(并且不均匀地)加载:"........"

However all it does is just gradually (and non-uniformly) load this: "........."

推荐答案

使用 \r 返回字符.这是因为你的光标在经过一段时间后应该回到原来的位置

Use \r the return character. This is because your cursor should return to the original position after you lapse the time

import time, sys

for i in range(15):
    sys.stdout.write("   ")
    x = i % 4
    sys.stdout.write('\r' + "." * x )
    time.sleep(0.5)
    sys.stdout.flush()

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