As of this writing the standard visualization package is called matplotlib, but that may be changing. While it has all of the basic functions, you would expect from a visualization library it is widely regarded as the weakest link in the Python technical stack. Among other problems the figures look fairly cartoonish by default. It is losing ground to other libraries like Seaborn (which is actually built on matplotlib but arguably has better default behavior) and web‐based visualizations like Plotly.
