擅长:python、mysql、java
<p><a href="https://docs.python.org/2/library/functions.html#enumerate" rel="nofollow">enumerate</a>允许不带局部变量进行计数。除此之外,它是两个序列的简单嵌套迭代。在</p>
<pre><code>end_pieces = ['ATCGCTGCAATG', 'CCTACGGCATGG', 'AGTACTTTATTA', 'TAACAGTTCTTC']
genome_ht = {'ATCGCTGCAATG': [18], 'CCTACGGCATGG': [30], 'AGTACTTTATTA': [42], 'TAACAGTTCTTC': [1]}
KEY_LENGTH = 12
start_positions = [index-count*KEY_LENGTH for count, read_piece in enumerate(end_pieces) for index in genome_ht[read_piece]]
</code></pre>