python 使用shell 命令

>>> import commands

>>> r = commands.getstatusoutput('wc -l /home/ramdump/Port_COM30_wenshuai/load.cmm')

>>> print r

(0, '101 /home/ramdump/Port_COM30_wenshuai/load.cmm')

>>> print r[1]

101 /home/ramdump/Port_COM30_wenshuai/load.cmm

>>> type(r[1])

<type 'str'>

>>> cmd = 'wc -l /home/ramdump/Port_COM30_wenshuai/load.cmm'

>>> 

>>> r = commands.getstatusoutput(cmd)

>>> print r[1]

101 /home/ramdump/Port_COM30_wenshuai/load.cmm

>>> 

>>> cmd1 = 'head -c 1024M /home/ramdump/Port_COM30_wenshuai/DDRCS0_0.BIN | strings -n 1 | grep "Linux version"'

>>> 

>>> r = commands.getstatusoutput(cmd1)

>>> print r[1]

Linux version 4.4.21-perf-gfef4cd4 (builder@phone-bsp-228-50) (gcc version 4.9 20150123 (prerelease) (GCC) ) #1 SMP PREEMPT Wed Apr 12 04:34:15 CST 2017

Linux version 

Linux version 4.4.21-perf-gfef4cd4 (builder@phone-bsp-228-50) (gcc version 4.9 20150123 (prerelease) (GCC) ) #1 SMP PREEMPT Wed Apr 12 04:34:15 CST 2017

>>> 

>>> type(r[1])
<type 'str'>

返回的结果是个tuple, (0, xxx) 0表示命令的状态

>>> type(r[0])

<type 'int'>