擅长:python、mysql、java
<p><a href="https://docs.python.org/3/library/collections.html#collections.Counter" rel="nofollow noreferrer"><strong>^{<cd1>}</strong></a>是一个<code>dict</code>子类,在这里很有用:</p>
<pre><code>from collections import Counter
dicts = [dict1, dict2, dict3]
key_counters = [Counter(dictionary.keys()) for dictionary in dicts]
start_counter = Counter()
result_dict = sum(key_counters, start_counter)
assert result_dict == {'Association': 2, 'Rule': 2, 'Mining': 3}
</code></pre>