擅长:python、mysql、java
<pre><code>from collections import Counter
def count_cases(strng):
counts = Counter(strng)
upper = 0
lower = 0
for char, count in counts.items():
if char.isupper():
upper += count
elif char.islower():
lower += count
return (upper, lower)
</code></pre>
<p>编辑:删除了<code>string</code>模块。使用内部<code>islower</code>和<code>isupper</code>方法。你知道吗</p>