code: def config_find_lines(regex, source='running'):
      r'''
      .. versionadded:: 2019.2.0
  
      Return the configuration lines that match the regular expressions from the
      ``regex`` argument. The configuration is read from the network device
      interrogated.
  
      regex
          The regular expression to match the configuration lines against.
  
      source: ``running``
          The configuration type to retrieve from the network device. Default:
          ``running``. Available options: ``running``, ``startup``, ``candidate``.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' napalm.config_find_lines '^interface Ethernet1\d'
      '''
      config_txt = __salt__['net.config'](source=source)['out'][source]
      return __salt__['ciscoconfparse.find_lines'](config=config_txt,
                                                   regex=regexf config_find_lines(regex, source='running'):
      r'''
      .. versionadded:: 2019.2.0
  
      Return the configuration lines that match the regular expressions from the
      ``regex`` argument. The configuration is read from the network device
      interrogated.
  
      regex
          The regular expression to match the configuration lines against.
  
      source: ``running``
          The configuration type to retrieve from the network device. Default:
          ``running``. Available options: ``running``, ``startup``, ``candidate``.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' napalm.config_find_lines '^interface Ethernet1\d'
      '''
      config_txt = __salt__['net.config'](source=source)['out'][source]
      return __salt__['ciscoconfparse.find_lines'](config=config_txt,
                                                   regex=regex)
docs: r'''
      .. versionadded:: 2019.2.0
  
      Return the configuration lines that match the regular expressions from the
      ``regex`` argument. The configuration is read from the network device
      interrogated.
  
      regex
          The regular expression to match the configuration lines against.
  
      source: ``running``
          The configuration type to retrieve from the network device. Default:
          ``running``. Available options: ``running``, ``startup``, ``candidate``.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' napalm.config_find_lines '^interface Ethernet1\d'