擅长:python、mysql、java
<p>生成列表并对元素求和:
</p>
<pre><code>import numpy as np
right = open('right.txt').readlines()
mylist = []
for line in right:
l = line.split()
mylist.append(float(l[3])) # add to list "mylist"
rightsum = np.sum(mylist)
print rightsum
</code></pre>
<p>或者,或者</p>
<pre><code>mylist = [float(line.split()[3]) for line in right] # generate numbers list
print np.sum(mylist) # sum numbers
</code></pre>