擅长:python、mysql、java
<p>下面的工作与marc的答案类似,但不是创建一个新的列表然后追加,而是在创建列表的同时执行。你知道吗</p>
<pre><code>everyday = {'hello':[],'goodbye':{}}
print("everyday:", everyday)
i_want = dict(everyday)
i_want ['afternoon'] = 'sun'
i_want['hello'] = [(1, 2, 3, 4)]
print("everyday:", everyday)
print("i_want:", i_want)
</code></pre>
<p>输出:</p>
<pre><code>everyday: {'hello': [], 'goodbye': {}}
everyday: {'hello': [], 'goodbye': {}}
i_want: {'hello': [(1, 2, 3, 4)], 'goodbye': {}, 'afternoon': 'sun'}
</code></pre>