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如果您运行的是macOS，那么在终端窗口中运行的代码应该可以工作：import time,os
for a in xrange(10,0,-1):
os.system("clear") # Clears the screen
print a # Prints the number
time.sleep(1) # Waits one second
如果您使用的是Windows，则此代码应该(可能)有效：import time,os
for a in xrange(10,0,-1):
os.system("cls") # Clears the screen (Windows equivalent)
print a # Prints the number
time.sleep(1) # Waits one second
但是，这只在终端/命令提示窗口中有效。在空闲状态下(如果这是你正在使用的)，它仍然只会打印10
9
8
...
假设您将Python文件保存为foo.py。然后打开终端或命令提示符窗口，导航到文件的位置，然后键入python foo.py
这应该会起作用的。如果您想了解更多有关如何使用终端/命令提示符的详细说明，我可以附加一个GIF或其他东西。
然而，在空闲时，我认为不可能清除输出。。。。也许sys.stdout中的方法可以工作？
