擅长:python、mysql、java
<p>检查此代码:</p>
<pre><code>my_string = "count a character occurance"
my_list = list(my_string)
print (my_list)
get_unique_char = set(my_list)
print (get_unique_char)
for key in get_unique_char:
print (key, my_string.count(key))
</code></pre>