擅长:python、mysql、java
<p>非常类似于下面的解决方案。你知道吗</p>
<pre><code>dna = 'AGGTCCCAATGA'
counts = {}
for nucleotide in dna:
if nucleotide not in counts:
counts[nucleotide] = 0
counts[nucleotide] += 1
for nucleotide in counts:
print(f'{nucleotide} occurs {counts[nucleotide]} times')
</code></pre>