擅长:python、mysql、java
<p>请尝试以下代码。希望这有助于:</p>
<pre><code>price = {
1: ['Blueberry', 'US', 1.31],
2: ['Pineapples', 'Brazil', 3.71],
3: ['Pear', 'Costa Rica' , 0.58],
4: ['Plum', 'US', 1.00],
5: ['Grapes', 'US', 1.25],
6: ['Papaya', 'Costa Rica', 0.4 ],
7: ['Blueberry', 'Mexico' , 1.58],
8: ['Plum', 'Mexico', 1.50],
9: ['Grapes', 'Italy', 2.25],
10: ['Blueberry', 'Italy', 2.50 ]
}
average = [ value[2] for key, value in price.items() if value[0]=='Blueberry']
print(sum(average)/len(average))
</code></pre>
<p>输出为:</p>
<pre><code>1.7966666666666669
</code></pre>