擅长:python、mysql、java
<p>你肯定想<a href="https://nedbatchelder.com/text/names.html" rel="nofollow noreferrer">read this</a></p>
<p>Python从不隐式地复制任何内容,因此筛选列表中的dict与“original”中的dict相同:</p>
<pre><code>>>> original = [{"foo": "bar"}]
>>> filtered = [item for item in original]
>>> print(id(original[0]))
140326431879528
>>> print(id(filtered[0]))
140326431879528
>>> original[0] is filtered[0]
True
>>>
</code></pre>