python 執行shell命令的類

在寫代碼時，經常需要執行系統命令或shell命令，這時候有一個執行命令的類，是相當方便的，如下：

腳本名：runCMD.py

# -*- coding: utf-8 -*-
import subprocess
import itertools,sys
reload(sys)
sys.setdefaultencoding( "utf-8" )
import logging
logger = logging.getLogger(__name__)

# execute command

class runCmd:
    def __init__(self,real=0):
        self.isReal = real  # 0:output realtime

    def run(self,cmd):
        try:
            P = subprocess.Popen(cmd,shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE)
            content = ''
            for line in itertools.chain(self.__print_std(P),self.__print_err(P)):
                line = '' if line == None else line.rstrip()
                content += line + '\n'
                if self.isReal == 0:
                    print(line)
            # communicate and get return code
            out, err = P.communicate()
            rCode = P.returncode
            if int(rCode) != int(0):
                return (False,rCode,content)
            else:
                return (True,rCode,content)
            # (True/False,code,content)
        except Exception,err:
            return (False,None,err)

    def __print_std(self,popen):
        for line in iter(popen.stdout.readline,b''):
            yield line

    def __print_err(self,popen):
        for line in iter(popen.stderr.readline,b''):
            yield line

調用的方式如下：

def commit2Git(file):
	'''
		將修改提交到git中
	'''
	if not os.path.exists(os.path.join(GIT_DIR,file)):
		logger.error('文件不存在')
		return {'code':False,'msg':'文件不存在'}
	cmd = 'cd %s;git add %s && git commit -m "%s"' % (GIT_DIR,file,file)
	n = runCmd(real=1)
	execute = n.run(cmd)
	if not execute[0]:
		logger.error("在git中提交失敗: %s" % execute[2])
		return {'code':False,'msg':"在git中刪除失敗: %s" % execute[2]}                                                 
	else:
		logger.info("提交git成功")
		return {'code':True}