python处理Windows平台上路径有空格

          port_list=[]  
          with open(httpd_conf, \"r\") as f:
                file_list = f.readlines()
                regex = ur\"^Listen\\s*(\\S*?:)*(\\d+)\\s*$\"
                pattern_listener = re.compile(regex)
                for item in file_list:
                    listener_list = pattern_listener.findall(item)
                    if listener_list:
                        for port_info in listener_list:
                            if port_info:
                                port = port_info[1]
                                if port and port.strip():
                                    port_list.append(port.strip())            

D:\\>D:\\Program Files\\Apache Software Foundation\\Apache2.2\\bin\\httpd.exe -v
\'D:\\Program\' 不是内部或外部命令，也不是可运行的程序或批处理文件。

D:\\>\"D:\\Program Files\\Apache Software Foundation\\Apache2.2\\bin\\httpd.exe\" -v
Server version: Apache/2.2.22 (Win32)
Server built:   Jan 28 2012 11:16:39

D:\\>\"D:\\Program Files\\Apache Software Foundation\\Apache2.2\\bin\\httpd.exe\" \"-v\"
Server version: Apache/2.2.22 (Win32)
Server built:   Jan 28 2012 11:16:39

>>> import os
>>> cmd=\'\"D:\\Program Files\\Apache Software Foundation\\Apache2.2\\bin\\httpd.exe\" -v\'
>>> os.popen(cmd).read()　　--这种写法读出来结果为空，是因为\\要经过转义，前边加个r就行，cmd与cmd1区别
\'\'
>>> cmd　　　　　　　　　　　　--\\b是正则表达式，所以变成了\\x08
\'\"D:\\\\Program Files\\\\Apache Software Foundation\\\\Apache2.2\\x08in\\\\httpd.exe\" -v\'
>>> cmd1=r\'\"D:\\Program Files\\Apache Software Foundation\\Apache2.2\\bin\\httpd.exe\" -v\'
>>> cmd1
\'\"D:\\\\Program Files\\\\Apache Software Foundation\\\\Apache2.2\\\\bin\\\\httpd.exe\" -v\'

>>> os.popen(cmd1).read()
\'Server version: Apache/2.2.22 (Win32)\\nServer built:   Jan 28 2012 11:16:39\\n\'
>>>

D:\\>\"D:\\Program Files\\Apache Software Foundation\\Apache2.2\\bin\\httpd.exe\" -V|find \"Server MPM\"
Server MPM:     WinNT

>>> cmd1=r\'\"D:\\Program Files\\Apache Software Foundation\\Apache2.2\\bin\\httpd.exe\" -V|find \"Server MPM\" \'
>>> os.popen(cmd1).read()
\'\'

>>> cmd2=r\'\"D:\\Program Files\\Apache Software Foundation\\Apache2.2\\bin\\httpd.exe\" -V|find Server MPM \'
>>> os.popen(cmd1).read()
\'\'

>>> cmd3=r\'\"D:\\Program Files\\Apache Software Foundation\\Apache2.2\\bin\\httpd.exe\" \"-V|find Server MPM\" \'
>>> os.popen(cmd1).read()
\'\'

>>> import subprocess
>>> cmd=r\'D:\\Program Files\\Apache Software Foundation\\Apache2.2\\bin\\httpd.exe -V|find \"Server MPM\"\'
>>> cmd
\'D:\\\\Program Files\\\\Apache Software Foundation\\\\Apache2.2\\\\bin\\\\httpd.exe -V|find \"Server MPM\"\'
>>> ps = subprocess.Popen(cmd)
>>> Server version: Apache/2.2.22 (Win32)
Server built:   Jan 28 2012 11:16:39
Server\'s Module Magic Number: 20051115:30
Server loaded:  APR 1.4.5, APR-Util 1.4.1
Compiled using: APR 1.4.5, APR-Util 1.4.1
Architecture:   32-bit
Server MPM:     WinNT
  threaded:     yes (fixed thread count)
    forked:     no

>>> homepath=\"D:\\Program Files\\Apache Software Foundation\\Apache2.2\"
>>> BinPath = os.path.join(homepath, \'bin\')
>>> os.chdir(BinPath)
>>> apache_model = os.popen(\'httpd.exe -V |find \"Server MPM\"\').read()
>>> print apache_model
Server MPM:     WinNT