擅长:python、mysql、java
<p>举个例子,假设我们有像这样的火腿</p>
<pre><code>hamsplits=['test',['test1',['test2','.']]]
print(hamsplits[-1][-1][-1]) # it would be equal to '.'
if hamsplits[-1][-1][-1] == '.': # here we are comparing it with "."
hamsplits[-1][-1] = hamsplits[-1][-1][:-1] # in this we are just removing the '.' from third list in hamsplits and taking all remaining elements
print(hamsplits[-1][-1][:-1]) # it would print ['test2'] (removing last element from list) and overwriting in hamsplits[-1][-1]
**Note**:
hamsplits[:-1] is removing the last element, it's a slicing in python
hamsplits[-1] you are accessing the last element
</code></pre>
<p>希望这有帮助!你知道吗</p>