擅长:python、mysql、java
<p>这里有一种方法可以只使用普通lib而不将整个文件保存在内存中</p>
<pre><code>import csv
def get_vals(filename):
with open(filename, 'rb') as fin:
reader = csv.reader(fin)
for line in reader:
if line[-1] <= 0:
yield line[0]
words = get_vals(filename)
for word in words:
do stuff...
</code></pre>