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【Python】封装subprocess来执行命令

作者:dangoakachan / 发布于2012/10/8/ 717

<div>!/usr/local/python/bin
# coding=utf-8</div>
<div>'''A simple interface to execute shell commands.</div>
<div>These ideas are taken from fabric/operations.py.</div>
<div>Examples 1: execute local command</div>
<div> # import command
 # out = command.local('uname -r')
 # print out.stdout
 2.6.32
 # print out.stderr
 ''
 # print out.succeeded
 True</div>
<div>Example 2: execute command in remote host through ssh</div>
<div> # import command
 # out = command.remote('10.x.x.x', 'uname -r')
 # print out.stdout
 2.6.32
'''
__author__ = 'tuantuan.lv <<a href="mailto:dangoakachan@foxmail.com>'">dangoakachan@foxmail.com>'</a></div>
import subprocess</div>
<div> Taken from web/utils.py
class Storage(dict):
 """
 A Storage object is like a dictionary except `obj.foo` can be used
 in addition to `obj['foo']`.</div>
<div> >>> o = storage(a=1)
 >>> o.a
 1
 >>> o['a']
 1
 >>> o.a = 2
 >>> o['a']
 2
 >>> del o.a
 >>> o.a
 Traceback (most recent call last):
 ...
 AttributeError: 'a'
 """
 def __getattr__(self, key):
 try:
 return self[key]
 except KeyError, k:
 raise AttributeError, k</div>
<div> def __setattr__(self, key, value):
 self[key] = value</div>
<div> def __delattr__(self, key):
 try:
 del self[key]
 except KeyError, k:
 raise AttributeError, k</div>
<div> def __repr__(self):
 return '<Storage ' + dict.__repr__(self) + '>'</div>
<div>def remote(ip, cmd, capture = True, timeout = None):
 ssh = "ssh -o StrictHostKeyChecking=no -o LogLevel=quiet -o BatchMode=yes"</div>
<div> if timeout is not None:
 ssh += ' -o ConnectTimeout=%d' % timeout</div>
<div> cmd = '%s %s "%s"' % (ssh, ip, cmd)</div>
<div> return local(cmd, capture)</div>
<div>def local(cmd, capture = True, shell = None):
 out_stream = subprocess.PIPE if capture else None
 err_stream = subprocess.PIPE if capture else None</div>
<div> p = subprocess.Popen(cmd, shell = True, stdout = out_stream,
 stderr = err_stream, executable = shell)</div>
<div> (stdout, stderr) = p.communicate()</div>
<div> out = Storage()</div>
<div> out.stdout = stdout.strip() if stdout else ""
 out.stderr = stderr.strip() if stdout else ""</div>
<div> out.cmd = cmd</div>
<div> out.failed = False
 out.return_code = p.returncode</div>
<div> if p.returncode != 0:
 out.failed = True</div>
<div> out.succeeded = not out.failed</div>
<div> return out</div>

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