在Jupyter Lab中显示vega规范

pip install vega
pip install vega_datasets

jupyter labextension install @jupyterlab/vega5-extension
jupyter labextension install jupyterlab-vega3-extension

import vega
import vega_datasets

import vega

vega_spec = {
  "$schema": "https://vega.github.io/schema/vega/v4.json",
  "description": "A simple bar chart with embedded data.",
  "data": {
    "values": [
      {"a": "A","b": 28}, {"a": "B","b": 55}, {"a": "C","b": 43},
      {"a": "D","b": 91}, {"a": "E","b": 81}, {"a": "F","b": 53},
      {"a": "G","b": 19}, {"a": "H","b": 87}, {"a": "I","b": 52}
    ]
  },
  "mark": "bar",
  "encoding": {
    "x": {"field": "a", "type": "ordinal"},
    "y": {"field": "b", "type": "quantitative"}
  }
}

vega.render(vega_spec)