TypeError：列表索引必须是整数或切片，而不是BioPython中的str

Question

以下代码导致了此错误：

Traceback (most recent call last):
  File "/t.py", line 19, in <module>
    seqsInfo[record.id] = SeqInfo(len(record), record.seq[0])
TypeError: list indices must be integers or slices, not str

from Bio import SeqIO

class SeqInfo():

    def __init__(self, length, seqStart):
        self.length = length
        self.seqStart = seqStart

seqsInfo=[]
for record in SeqIO.parse("data/hybrid.AA.fasta", "fasta"):
    seqsInfo[record.id] = SeqInfo(len(record), record.seq[0])

这是输入文件：

>STRG2.t1 gene=STRG2 seq_id=NbV1Ch01 type=cds
PYKTCHKKFRNKMPSFYLASFCIMVLSFSITFASGNSVSNKTCIDDATIVLSFGLYQNSC
LEAEAIIYSWVERAVSQDPRMAASLLRLHFHDCFVNGCDASVLLDDTPNFIGEKTAAPNL
NSLRGFEVIDSIKADLELACPQTVSCADILAIAARDSVVLSGGWRWKVQMGRKDSLTAST
KAVNNNIPGPNSNIATLVSSFQNIGLSLQDMVTLSGAHTIGSARCSTFSSRLNGGGNSDM
NLDFLQSLQQLCSVSDTNITLANLDDMTPSTFDNQYYVNLLSGKGLLVSDQVLASGDDNT
REIVQTYVDDPSAFFDDFRNSMLKMGSLAPPTGTTGEIRVNCRV

我错过了什么

Answer 1

由于您试图将一个非整数作为索引分配给列表，因此会出现这样的错误。请将列表更改为dict，因为record.id是“STRG2.t1”。希望这能解决问题：

from Bio import SeqIO

class SeqInfo():

    def __init__(self, length, seqStart):
        self.length = length
        self.seqStart = seqStart

seqsInfo={}
for record in SeqIO.parse("data/hybrid.fasta", "fasta"):
    seqsInfo[record.id] = SeqInfo(len(record), record.seq[0])
print(seqsInfo)

输出： {'STRG2.t1'：<；main.SeqInfo对象位于0x1178b3710>；}