utils.py 文件源码

def open_maybe_gzip(filename, mode='r'):
    if filename.endswith(cr_constants.GZIP_SUFFIX):
        gunzip = subprocess.Popen(['gunzip', '-c', filename],
                                  stdout=subprocess.PIPE,
                                  preexec_fn=os.setsid)
        return gunzip.stdout
    else:
        return open(filename, mode)