擅长:python、mysql、java
<p>使用for循环执行此操作的一种方法是:</p>
<pre><code>avg = []
l = len(averages_dict) #for loop easier to read/calculate len once rather than twice
for i in range(l): # in the example case, range is 0-2(len is 3)
total = 0 # initiate/re-initiate total
for d in averages_dict: # for each item in dict
total += averages_dict[d][i] # add dict[d] position i to total
avg.append(total/l) # append total/len to avg
</code></pre>
<p>平均值现在等于:</p>
^{pr2}$