class_docstr: <<< Line Chart >>>
  
  Line chart is a graph that connects all data points
  with single line to show the change trend of data.
code: def add_yaxis(
      self,
      series_name: str,
      y_axis: types.Sequence[types.Union[opts.LineItem, dict]],
      *,
      is_connect_nones: bool = False,
      xaxis_index: types.Optional[types.Numeric] = None,
      yaxis_index: types.Optional[types.Numeric] = None,
      color: types.Optional[str] = None,
      is_symbol_show: bool = True,
      symbol: types.Optional[str] = None,
      symbol_size: types.Union[types.Numeric, types.Sequence] = 4,
      stack: types.Optional[str] = None,
      is_smooth: bool = False,
      is_clip: bool = True,
      is_step: bool = False,
      is_hover_animation: bool = True,
      z_level: types.Numeric = 0,
      z: types.Numeric = 0,
      log_base: types.Numeric = 10,
      sampling: types.Optional[str] = None,
      dimensions: types.Union[types.Sequence, None] = None,
      series_layout_by: str = "column",
      markpoint_opts: types.MarkPoint = None,
      markline_opts: types.MarkLine = None,
      tooltip_opts: types.Tooltip = None,
      itemstyle_opts: types.ItemStyle = None,
      label_opts: types.Label = opts.LabelOpts(),
      linestyle_opts: types.LineStyle = opts.LineStyleOpts(),
      areastyle_opts: types.AreaStyle = opts.AreaStyleOpts(),
      encode: types.Union[types.JSFunc, dict, None] = None,
  ):
      self._append_color(color)
      self._append_legend(series_name)
  
      if all([isinstance(d, opts.LineItem) for d in y_axis]):
          data = y_axis
      else:
          # 合并 x 和 y 轴数据，避免当 X 轴的类型设置为 'value' 的时候，
          # X、Y 轴均显示 Y 轴数据
          try:
              xaxis_index = xaxis_index or 0
              data = [
                  list(z)
                  for z in zip(
                      self.options["xAxis"][xaxis_index]["data"], y_axis
                  )
              ]
          except IndexError:
              data = [list(z) for z in zip(self._xaxis_data, y_axis)]
  
      if self.options.get("dataset") is not None and not y_axis:
          data = None
  
      self.options.get("series").append(
          {
              "type": ChartType.LINE,
              "name": series_name,
              "connectNulls": is_connect_nones,
              "xAxisIndex": xaxis_index,
              "yAxisIndex": yaxis_index,
              "symbol": symbol,
              "symbolSize": symbol_size,
              "showSymbol": is_symbol_show,
              "smooth": is_smooth,
              "clip": is_clip,
              "step": is_step,
              "stack": stack,
              "data": data,
              "hoverAnimation": is_hover_animation,
              "label": label_opts,
              "logBase": log_base,
              "sampling": sampling,
              "dimensions": dimensions,
              "encode": encode,
              "seriesLayoutBy": series_layout_by,
              "lineStyle": linestyle_opts,
              "areaStyle": areastyle_opts,
              "markPoint": markpoint_opts,
              "markLine": markline_opts,
              "tooltip": tooltip_opts,
              "itemStyle": itemstyle_opts,
              "zlevel": z_level,
              "z": z,
          }
      )
      return self
  
imports: from ...None import options
  from ...None import types
  from ...charts.chart import RectChart
  from ...globals import ChartType
label_desc: Use image node_id 1 for calling the Line obj's underlying member method code with example usage: obj.add_yaxis(series_name, y_axis) and returns: self