python – 在subprocess.Popen中使用\u0026\u0026进行命令链接?
作者:互联网
我正在使用subprocess.Popen和Python,我没有遇到通过Popen加入命令(即foobar&& bizbang)的优雅解决方案.
我能做到这一点:
p1 = subprocess.Popen(["mmls", "WinXP.E01"], stdout=subprocess.PIPE)
result = p1.communicate()[0].split("\n")
for line in result:
script_log.write(line)
script_log.write("\n")
p1 = subprocess.Popen(["stat", "WinXP.E01"], stdout=subprocess.PIPE)
result = p1.communicate()[0].split("\n")
for line in result:
script_log.write(line)
但这真的不是很美观(特别是如果我通过Popen菊花链接多个命令.
我想在尽可能少的命令块中复制此输出.
not@work ~/ESI/lab3/images $mmls WinXP.E01 && echo -e "\n" && stat WinXP.E01
DOS Partition Table
Offset Sector: 0
Units are in 512-byte sectors
Slot Start End Length Description
00: Meta 0000000000 0000000000 0000000001 Primary Table (#0)
01: ----- 0000000000 0000000062 0000000063 Unallocated
02: 00:00 0000000063 0020948759 0020948697 NTFS (0x07)
03: ----- 0020948760 0020971519 0000022760 Unallocated
File: `WinXP.E01'
Size: 4665518381 Blocks: 9112368 IO Block: 4096 regular file
Device: 14h/20d Inode: 4195953 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 1000/ nott) Gid: ( 1000/ nott)
Access: 2013-03-16 23:20:41.901326579 -0400
Modify: 2013-03-04 10:05:50.000000000 -0500
Change: 2013-03-13 00:25:33.254684050 -0400
Birth: -
有什么建议?
注意:我想避免在subprocess.Popen中键入它
p1 = subprocess.Popen(["mmls WinXP.E01 && echo -e '\n' && stat WinXP.E01"], stdout=subprocess.PIPE)
解决方法:
&安培;&安培;是一个shell操作符,POpen默认不使用shell.
如果你想使用shell功能在你的POpen调用中使用shell = True,但要注意它稍慢/内存密集.
p1 = subprocess.Popen(["mmls", "WinXP.E01", "&&", "echo", "-e", "\"\n\"", "&&", "stat", "WinXP.E01"],
stdout=subprocess.PIPE, shell=True)
标签:python,linux,python-2-7,popen,chaining 来源: https://codeday.me/bug/20190620/1244949.html