擅长:python、mysql、java
<p>有一个标准库,完全用于公共迭代方法,称为<a href="https://docs.python.org/2/library/itertools.html" rel="nofollow noreferrer">^{<cd1>}</a>。你知道吗</p>
<p>您的应用程序听起来最需要<code>itertools.chain.from_iterable()</code>:</p>
<pre><code>from itertools import chain
with open('filename.txt') as f:
for letter in chain.from_iterable(f):
do_stuff(letter)
</code></pre>