title: Plotly express vs. Altair/Vega-Lite for interactive plots
body: <p>Recently I am learning both <a href="https://plot.ly/python/plotly-express/" rel="noreferrer">Plotly express</a> and <a href="https://altair-viz.github.io/" rel="noreferrer">Altair/Vega-Lite</a> for interactive plotting. Both of them are quite impressive and I am wondering what their strengths and weaknesses are. Especially for creating interactive plots, are there any big differences between them and when is one more suitable than the other?</p>