我正在尝试使用EMBOSS的biopython包装器对一组大约100个非常长(>8000个序列)的序列进行局部比对。
基本上,我需要将fasta文件中的每个序列与fasta文件中的每个其他序列进行局部比对。到目前为止,我已经尝试运行以下非常基本的代码:
from Bio.Emboss.Applications import NeedleCommandline
from Bio import AlignIO
seq_fname1 = 'gross-alignment.fasta'
seq_fname2 = 'gross-alignment.fasta'
needle_fname = 'pairwise_output.txt'
needle_cli = NeedleCommandline(asequence=seq_fname1, \
bsequence=seq_fname2, \
gapopen=10, \
gapextend=0.5, \
outfile=needle_fname)
"""This generates the needle file"""
needle_cli()
"""That parses the needle file, aln[0] and aln[1] contain the aligned
first and second sequence in the usual format (e.g. - for a gap)"""
aln = AlignIO.read(needle_file, "emboss")
print aln但是当我这样做的时候,我得到了以下错误:
C:\WINDOWS\system32\cmd.exe /c (python ^<C:\Users\User\AppData\Local\Temp\VIiAAD1.tmp) Traceback (most recent call last): File "<stdin>", line 14, in <module> File "C:\Python27\lib\site-packages\Bio\Application\__init__.py", line 495, in __call__ shell=use_shell) File "C:\Python27\Lib\subprocess.py", line 711, in __init__ errread, errwrite) File "C:\Python27\Lib\subprocess.py", line 959, in _execute_child startupinfo) WindowsError: [Error 2] The system cannot find the file specified shell returned 1 Hit any key to close this window...
我不知道这个错误的原因是什么,如果有任何帮助,我们将不胜感激。
发布于 2016-07-26 03:49:55
你能尝试seq_fname1和seq_fname2的绝对路径吗?另外,我希望您在提升的命令提示符中尝试此操作
将其从评论中移至答案:)
https://stackoverflow.com/questions/38573775
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