文件名是动态的,我需要提取文件扩展名.文件名如下所示:
parallels-workstation-parallels-en_US-6.0.13976.769982.run.sh
20090209.02s1.1_sequence.txt
SRR002321.fastq.bz2
hello.tar.gz
ok.txt
对于第一个我要提取txt,第二个我要提取fastq.bz2,对于第三个我要提取tar.gz.
我使用os模块获取文件扩展名为:
import os.path
extension = os.path.splitext('hello.tar.gz')[1][1:]
这给了我只有gz,如果文件名是ok.txt就没问题但是对于这个我希望扩展名为tar.gz.
最佳答案
import os
def splitext(path):
for ext in ['.tar.gz', '.tar.bz2']:
if path.endswith(ext):
return path[:-len(ext)], path[-len(ext):]
return os.path.splitext(path)
assert splitext('20090209.02s1.1_sequence.txt')[1] == '.txt'
assert splitext('SRR002321.fastq.bz2')[1] == '.bz2'
assert splitext('hello.tar.gz')[1] == '.tar.gz'
assert splitext('ok.txt')[1] == '.txt'
删除点:
import os
def splitext(path):
for ext in ['.tar.gz', '.tar.bz2']:
if path.endswith(ext):
path, ext = path[:-len(ext)], path[-len(ext):]
break
else:
path, ext = os.path.splitext(path)
return path, ext[1:]
assert splitext('20090209.02s1.1_sequence.txt')[1] == 'txt'
assert splitext('SRR002321.fastq.bz2')[1] == 'bz2'
assert splitext('hello.tar.gz')[1] == 'tar.gz'
assert splitext('ok.txt')[1] == 'txt'