擅长:python、mysql、java
<p>这可能会让它更清楚一点:</p>
<pre><code>class Node():
def __init__(self,wordList=[]):
self.wordList = wordList
a = Node()
b = Node()
print(id(a.wordList))
print(id(b.wordList))
</code></pre>
<p>结果是</p>
^{pr2}$
<p>。。。换句话说,a.wordList和b.wordList都引用同一个列表。在</p>