我试图读取通过多个序列提交到NCBI爆炸网站生成的XML文件的列表。从每个文件中,我想打印某些信息。 我想要读取的文件全部给出后缀"_recombination.xml"
。阅读多个爆炸文件(biopython)
for file in glob.glob("*_recombination.xml"):
result_handle= open(file)
blast_record=NCBIXML.read(result_handle)
for alignment in blast_record.alignments:
for hsp in alignment.hsps:
print "*****Alignment****"
print "sequence:", alignment.title
print "length:", alignment.length
print "e-value:", hsp.expect
print hsp.query
print hsp.match
print hsp.sbjct
脚本首先找到所有与"_recombination.xml"
后缀,然后,我希望它读取每个文件和打印某些行的文件(这是几乎从BioPython直副本烹饪书),这似乎去做。但我得到以下错误:
Traceback (most recent call last):
File "Scripts/blast_test.py", line 202, in <module>
blast_record=NCBIXML.read(result_handle)
File "/Library/Python/2.7/site-packages/Bio/Blast/NCBIXML.py", line 576, in read
first = iterator.next()
File "/Library/Python/2.7/site-packages/Bio/Blast/NCBIXML.py", line 643, in parse
expat_parser.Parse("", True) # End of XML record
xml.parsers.expat.ExpatError: no element found: line 3106, column 7594
我不确定问题出在哪里。我不知道这是否是回过它已经阅读 - 例如文件试图循环,关闭文件似乎帮助:
for file in glob.glob("*_recombination.xml"):
result_handle= open(file)
blast_record=NCBIXML.read(result_handle)
for alignment in blast_record.alignments:
for hsp in alignment.hsps:
print "*****Alignment****"
print "sequence:", alignment.title
print "length:", alignment.length
print "e-value:", hsp.expect
print hsp.query
print hsp.match
print hsp.sbjct
result_handle.close()
blast_record.close()
但是,这也给了我另一个错误:
Traceback (most recent call last):
File "Scripts/blast_test.py", line 213, in <module> blast_record.close()
AttributeError: 'Blast' object has no attribute 'close'
删除行blast_record.close(),解析的对象没有关闭的方法(这是AttributeError试图告诉你)。 – peterjc 2013-03-14 11:28:47
ExpatError可能是由于破损的XML文件造成的,例如截断的输出。你有没有检查它的眼睛抱怨的具体文件? – peterjc 2013-03-14 11:29:57