擅长:python、mysql、java
<p>改变一下:</p>
<pre><code>everyday = {'hello':[],'goodbye':{}}
i_want = dict(everyday)
i_want ['afternoon'] = 'sun'
i_want['hello'] = [] # We're facing the same issue here and this is why we are initializing a new list and giving it to the hello key
i_want['hello'].append((1,2,3,4))
# to add to goodbye don't forget the following:
# i_want['goodbye'] = {}
# i_want['goodbye'] = "Some value"
print(everyday)
</code></pre>
<p>所发生的是调用(i\u want=everyday)实际上是创建了一个对everyday的引用</p>
<p>如果您想查看是否引用了词典,只需调用</p>
<pre><code>print(i_want is everyday)
</code></pre>