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我正在开发一个相当简单的程序，将给定的非编码 DNA 链转换为所有对应物（编码、mRNA、tRNA 和氨基酸链）。

IndexError但是，当我尝试对字符串进行切片时，我得到了一个：

mRNA_parts = mRNA.split(' ')
print mRNA_parts,  # using for debugging purposes

for base in mRNA_parts:
    print base # again, for debugging
    partA = base[0]
    partB = base[1]
    partC = base[2]
    my_acid = (amino_acids[partA][partB][partC]) + ' '
    # 'amino_acids' is a 3D (thrice-nested) dictionary with the corresponding parts of mRNA to convert to the amino acid chain.
    # part of the nested dictionary: amino_acids = {'U': {'U': {'U': 'Phe'}}}. This is only one part (out of 64) of it.
    # Thus, if  the mRNA section was 'UUU', the amino acid would be 'Phe '.
    acid_strand += my_acid

这是我得到的错误：

['GAU', '']
GAU


Traceback (most recent call last):
  File "D:\my_stuff\Google Drive\documents\SCHOOL\Programming\Python\DNA to RNA Converter.py", line 83, in <module>
    main()
  File "D:\my_stuff\Google Drive\documents\SCHOOL\Programming\Python\DNA to RNA Converter.py", line 3, in main
    convert(non_coding)
  File "D:\my_stuff\Google Drive\documents\SCHOOL\Programming\Python\DNA to RNA Converter.py", line 58, in convert
    partA = base[0]
IndexError: string index out of range

base[0]基地是'GAU'怎么办？

根据它打印的内容，'GAU' 不是字符串吗？它周围没有任何引用。

提前致谢！

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1 回答 1

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它没有显示错误GAU，而是显示空字符串''，您将其作为列表的第二个元素。在循环开始时添加一个测试以忽略它。

于 2012-12-22T17:19:16.617 回答