DOC: add isotype emoji example
@@ -6,8 +6,8 @@ Inspired by `Only An Ocean Between, 1943 <http://www.thomwhite.co.uk/?p=1303>`_.
This is adapted from Vega-Lite example https://vega.github.io/editor/#/examples/vega-lite/isotype_bar_chart
'''
# category: case studies
-import pandas as pd
import altair as alt
+import pandas as pd
source = pd.DataFrame([
{'country': 'Great Britain', 'animal': 'cattle'},
