<ruby id="bdb3f"></ruby>

    <p id="bdb3f"><cite id="bdb3f"></cite></p>

      <p id="bdb3f"><cite id="bdb3f"><th id="bdb3f"></th></cite></p><p id="bdb3f"></p>
        <p id="bdb3f"><cite id="bdb3f"></cite></p>

          <pre id="bdb3f"></pre>
          <pre id="bdb3f"><del id="bdb3f"><thead id="bdb3f"></thead></del></pre>

          <ruby id="bdb3f"><mark id="bdb3f"></mark></ruby><ruby id="bdb3f"></ruby>
          <pre id="bdb3f"><pre id="bdb3f"><mark id="bdb3f"></mark></pre></pre><output id="bdb3f"></output><p id="bdb3f"></p><p id="bdb3f"></p>

          <pre id="bdb3f"><del id="bdb3f"><progress id="bdb3f"></progress></del></pre>

                <ruby id="bdb3f"></ruby>

                企業??AI智能體構建引擎,智能編排和調試,一鍵部署,支持知識庫和私有化部署方案 廣告
                所屬專題:[字符串算法](README.md) &emsp; ## 問題 在DNA序列中,堿基'A'與'T'是互補的,'C'和'G'是互補的。DNA序列`$ s $`的反向互補序列是將`$ s $`的堿基反向排序,然后取其互補堿基而組成的序列`$ s^c $`. (例如,DNA序列'GTCA'的反向互補序列是'TGAC') **輸入:** 一條DNA序列`$ s $`,長度最長為1000 bp. **輸出:** `$ s $`的反向互補序列`$ s^c $`. **樣例數據:** ``` AAAACCCGGT ``` **樣例輸出:** ``` ACCGGGTTTT ``` &emsp; ## 背景知識 該問題涉及分子生物學的基礎入門知識。詳情請查閱ROSALIND網站上[關于該問題的背景說明](http://rosalind.info/problems/revc/)。 &emsp; ## 解答 ```python def rev_comp(s): """輸出DNA序列s的反向互補序列""" sc = '' for i in reversed(s): if i is 'A': sc += 'T' elif i is 'C': sc += 'G' elif i is 'G': sc += 'C' elif i is 'T': sc += 'A' return sc ## --main-- with open("rosalind_revc.txt", 'r') as f1: s = f1.read().strip() with open("rosalind_revc_out.txt", 'w') as f2: f2.write(rev_comp(s)) ```
                  <ruby id="bdb3f"></ruby>

                  <p id="bdb3f"><cite id="bdb3f"></cite></p>

                    <p id="bdb3f"><cite id="bdb3f"><th id="bdb3f"></th></cite></p><p id="bdb3f"></p>
                      <p id="bdb3f"><cite id="bdb3f"></cite></p>

                        <pre id="bdb3f"></pre>
                        <pre id="bdb3f"><del id="bdb3f"><thead id="bdb3f"></thead></del></pre>

                        <ruby id="bdb3f"><mark id="bdb3f"></mark></ruby><ruby id="bdb3f"></ruby>
                        <pre id="bdb3f"><pre id="bdb3f"><mark id="bdb3f"></mark></pre></pre><output id="bdb3f"></output><p id="bdb3f"></p><p id="bdb3f"></p>

                        <pre id="bdb3f"><del id="bdb3f"><progress id="bdb3f"></progress></del></pre>

                              <ruby id="bdb3f"></ruby>

                              哎呀哎呀视频在线观看