擅长:python、mysql、java
<p>在Python中,变量保存对对象的引用。你知道吗</p>
<p>要“更改”变量,可以更改引用的对象。或引用其他对象。
您没有更新变量:</p>
<blockquote>
<p>"in place" update:</p>
</blockquote>
<pre><code>import time
from random import randint
RandomTimer = randint(1,10) #picks random number of seconds for countdown
while RandomTimer > 0:
time.sleep(1)
RandomTimer -= 1 #reduces random number every second until it reaches 0
print("random timer ended")
</code></pre>
<p>或创建新引用:</p>
<pre><code>RandomTimer = randint(1,10) #picks random number of seconds for countdown
while RandomTimer > 0:
time.sleep(1)
RandomTimer = RandomTimer -1 #reduces random number every second until it reaches 0
print("random timer ended")
</code></pre>