通过python3子进程发送管道命令

cd /home/mailer-domains/domain | rndc loadkeys domain

我尝试了很多使用.call和.Popen的方法,但它不喜欢我的管道,或者它不喜欢我的开关

>>> subprocess.call(['cd /home/mailer-domains/'+domain,'|','rndc','loadkeys',domain])    
Traceback (most recent call last):
  File "<stdin>",line 1,in <module>
  File "/usr/local/lib/python3.4/subprocess.py",line 537,in call
    with Popen(*popenargs,**kwargs) as p:
  File "/usr/local/lib/python3.4/subprocess.py",line 859,in __init__
    restore_signals,start_new_session)
  File "/usr/local/lib/python3.4/subprocess.py",line 1457,in _execute_child
    raise child_exception_type(errno_num,err_msg)
FileNotFoundError: [Errno 2] No such file or directory: 'cd /home/mailer-domains/lecomm.com'

>>> subprocess.call(['cd /home/ex-mailer-domains/'+domain,'&&',domain]) 
Traceback (most recent call last):
  File "<stdin>",err_msg)
FileNotFoundError: [Errno 2] No such file or directory: 'cd /home/mailer-domains/lecomm.com'


>>> subprocess.call(['cd','/home/mailer-domains/'+domain,domain])
cd: too many arguments
2


>>> subprocess.Popen(['cd',domain])    
<subprocess.Popen object at 0x805aa5860>
cd: too many arguments


>>> subprocess.call(['cd','/home/mailer-domains/'+domain] '&&' ['rndc',domain])    
  File "<stdin>",line 1
    subprocess.call(['cd',domain])
                                                                 ^
SyntaxError: invalid syntax


>>> subprocess.call(['cd','/home/mailer-domains/'+domain],'&&' ['rndc',domain])
Traceback (most recent call last):
  File "<stdin>",in <module>
TypeError: string indices must be integers


>>> subprocess.call(['cd',['rndc',domain])     
Traceback (most recent call last):
  File "<stdin>",line 767,in __init__
    raise TypeError("bufsize must be an integer")
TypeError: bufsize must be an integer


>>> subprocess.call(['cd','/home/mailer-domains/'+domain] ['rndc',in <module>
TypeError: list indices must be integers,not tuple


>>> subprocess.call(['cd','/home/mailer-domains/'+domain] +['rndc',domain])
cd: too many arguments
2


>>> ps = subprocess.Popen((['cd','/home/mailer-domains/'+domain]),stdout = subprocess.PIPE)        
>>> output = subprocess.check_output((['rndc',domain]),stdin=ps.stdout)
rndc: 'loadkeys' failed: not found
no matching zone 'lecomm.com' in any view
Traceback (most recent call last):
  File "<stdin>",line 620,in check_output
    raise CalledProcessError(retcode,process.args,output=output)
subprocess.CalledProcessError: Command '['rndc','lecomm.com']' returned non-zero exit status 1


>>> output = subprocess.check_output((['rndc',stdin=ps.stdout,stdout=PIPE)
Traceback (most recent call last):
  File "<stdin>",in <module>
NameError: name 'PIPE' is not defined

如何通过Python3子进程正确发送2个管道命令？