擅长:python、mysql、java
<p>@JSKennard我对我的答案做了编辑。如果您需要,请告诉我</p>
<p><strong>编辑1</strong></p>
<pre><code>a = []
with open('a.txt', 'r') as f:
for line in f.readlines()[1:]:
data = line.split()
print(data[0])
</code></pre>
<p>我的txt文件</p>
<pre><code>(g-r)_obs (g-r)_err (u-g)_obs (u-g)_err
0.45 0.05 1.08 0.13
0.49 0.05 1.06 0.10
</code></pre>
<p>输出:</p>
<pre><code>0.45
0.49
</code></pre>