Flet-Charts and ECharts

[pychans]

The official should not spend too much time on Flet-Charts(Human energy is limited). In the chart, its route should be:
Optimize Canvas to ensure its support for various designs (the bottom layer supports custom design of charts and believes in the power of the community);
Or, we can package existing relatively complete libraries (such as ECharts/pyecharts), focus on interfaces and effects, and simplify use.
Easy to use, beautiful and interactive
#68
#2043
#5200