我的代码有问题。我正试着用生物毒素遍历genbank文件中的基因列表。下面是它的样子:
class genBank:
gbProtId = str()
gbStart = int()
gbStop = int()
gbStrand = int()
genBankEntries = list()
for seq_record in SeqIO.parse(genBankFile, "genbank"):
for seq_feature in seq_record.features:
genBankEntry = genBank
if seq_feature.type == "CDS":
genBankEntry.gbProtId = seq_feature.qualifiers['protein_id']
genBankEntry.gbStart = seq_feature.location.start # prodigal GFF3 output is 1 based indexing
genBankEntry.gbStop = seq_feature.location.end
genBankEntry.gbStrand = seq_feature.strand
genBankEntries.append(genBankEntry)
它看起来应该可以工作,但是当我运行它时,得到的结构genBankEntries
只是一个巨大的堆栈,大小相当于genbank文件中的基因数,但是只有seq\u record.features中的最终值作为每个列表元素:
00 = {type} <class '__main__.genBank'>
gbProtId = {list} ['BAA31840.1']
gbStart = {ExactPosition} 90649
gbStop = {ExactPosition} 91648
gbStrand = {int} 1
...
82 = {type} <class '__main__.genBank'>
gbProtId = {list} ['BAA31840.1']
gbStart = {ExactPosition} 90649
gbStop = {ExactPosition} 91648
gbStrand = {int} 1
这尤其令人困惑,因为两个for循环似乎都正常工作:
for seq_record in SeqIO.parse(genBankFile, "genbank"):
for seq_feature in seq_record.features:
print(seq_feature)
为什么会这样
您永远不会创建
genBank
类的任何实例。每个循环迭代都在更改genBank
类的类级属性,并且每次都将相同的对象添加到列表中。循环中的每一次传递都会覆盖上一次传递中的值对于内部循环的第一行,添加括号来调用类型并创建
genBank
的实例。而是genBankEntry = genBank()
。这将为每个循环过程创建一个新的不同对象相关问题 更多 >
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