pyecharts的line图表如何设置series.seriesLayoutBy？

Question

这里是js配置对象

option = {
  legend: {},
  tooltip: {},
  dataset: {
    source: [
      ['product', '2015', '2016', '2017'],
      ['Matcha Latte', 43.3, 85.8, 93.7],
      ['Milk Tea', 83.1, 73.4, 55.1],
      ['Cheese Cocoa', 86.4, 65.2, 82.5],
      ['Walnut Brownie', 72.4, 53.9, 39.1]
    ]
  },
  xAxis: { type: 'category', name: '121' },
  yAxis: {},
  series: [
    // These series are in the first grid.
    { type: 'line', seriesLayoutBy: 'row' },
    { type: 'line', seriesLayoutBy: 'row' },
    { type: 'line', seriesLayoutBy: 'row' },
    { type: 'line', seriesLayoutBy: 'row' }
  ]
};

渲染结果如下：

下面是python配置

from pyecharts import options as opts
from pyecharts.charts import Bar
bartest = Line().add_dataset(
        source=[
            ["product", "2015", "2016", "2017"],
            ["Matcha Latte", 43.3, 85.8, 93.7],
            ["Milk Tea", 83.1, 73.4, 55.1],
            ["Cheese Cocoa", 86.4, 65.2, 82.5],
            ["Walnut Brownie", 72.4, 53.9, 39.1],
        ]
    ) \
    .add_yaxis(series_name="2015", y_axis=[]) \
    .add_yaxis(series_name="2016", y_axis=[]) \
    .add_yaxis(series_name="2017", y_axis=[]) \
    .set_global_opts(
        xaxis_opts=opts.AxisOpts(type_="category"),
    )
bartest.render_notebook()
# pprint.pprint(bartest.dump_options_with_quotes())
# bartest.dump_options_with_quotes()

渲染结果如下，是空的，dump出配置对象后到js的echarts中排查发现是设置y_axis为空数组导致，但是如果是Bar图表就不会有这个问题：

现在我想实现的是

1. Pyecharts的Line图表支持source
2. 设置Line图表中series.seriesLayoutBy这个属性为row

pyecharts这边好像没有看到line图表demo是怎么设置的。上面python的配置通过 bartest.dump_options_with_quotes() 导出之后并没有看到 series 对象中存在 seriesLayoutBy 。但是Bar图表中是可以设置的只是Line图表中没有看到