When we want to use Unix command in python we can directly use
os.system() to realize it. However, if we only want to return the output as a string, for example, return
ls file names into a string, we need to use
To note that, the output from
subprocess.check_out() is a bytes object instead of a string, thus we need to further
decode to transform into a string.
fileList = subprocess.check_output('ls someFolder/*', shell=True).decode('utf-8').strip().split('\n')