Command to start kernels

def argv(self):
        """Command to start kernels"""
        # Python interpreter used to start kernels
        if CONF.get('main_interpreter', 'default'):
            pyexec = get_python_executable()
        else:
            # Avoid IPython adding the virtualenv on which Spyder is running
            # to the kernel sys.path
            os.environ.pop('VIRTUAL_ENV', None)
            pyexec = CONF.get('main_interpreter', 'executable')
            if not is_python_interpreter(pyexec):
                pyexec = get_python_executable()
                CONF.set('main_interpreter', 'executable', '')
                CONF.set('main_interpreter', 'default', True)
                CONF.set('main_interpreter', 'custom', False)

        # Fixes Issue #3427
        if os.name == 'nt':
            dir_pyexec = osp.dirname(pyexec)
            pyexec_w = osp.join(dir_pyexec, 'pythonw.exe')
            if osp.isfile(pyexec_w):
                pyexec = pyexec_w

        # Command used to start kernels
        kernel_cmd = [
            pyexec,
            '-m',
            'spyder_kernels.console',
            '-f',
            '{connection_file}'
        ]

        return kernel_cmd