def _runshell(cmd, exception):
    """ Run a shell command. if fails, raise a proper exception. """
    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    if p.wait() != 0:
        raise BridgeException(exception)
    return p
def _runshell ( cmd , exception ) : p = subprocess . Popen ( cmd , stdout = subprocess . PIPE , stderr = subprocess . PIPE ) if p . wait ( ) != 0 : raise BridgeException ( exception ) return p
Run a shell command. if fails, raise a proper exception.