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                所屬專題:[字符串算法](README.md) &emsp; ## 問題 RNA序列是由A, C, G, U四種字符組成的序列。給定一個DNA序列`$ t $`,它的轉錄產物`$ u $`由`$ t $`中對應字符組成,其中字符T替換為U. **輸入:** 一條DNA序列`$ t $`,長度不超過1000 nt. **輸出:** `$ t $`轉錄得到的RNA序列。 **樣例數據:** ``` GATGGAACTTGACTACGTAAATT ``` **樣例輸出:** ``` GAUGGAACUUGACUACGUAAAUU ``` &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/rna/)。 &emsp; ## 解答 ```python def dna2rna(t): """將輸入的DNA序列轉錄為對應的RNA再輸出""" u = t.replace('T', 'U') return u ## --main-- with open("rosalind_rna.txt", 'r') as f1: t = f1.read().strip() with open("rosalind_rna_out.txt", 'w') as f2: f2.write(dna2rna(t)) ```
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