擅长:python、mysql、java
<p>您可以使用<a href="https://docs.python.org/3.9/library/itertools.html#itertools.count" rel="noreferrer">^{<cd1>}</a>,它返回数字的迭代器:</p>
<pre><code>>>> import itertools
>>> tmp_text = ['col1','','col2','col3','','']
>>> counter = itertools.count(1)
>>> new_text = [x or f'Nan{next(counter)}' for x in tmp_text]
['col1', 'Nan1', 'col2', 'col3', 'Nan2', 'Nan3']
</code></pre>