As you will see, you probably will need to add legends to your plots.
Matplotlib will add a legend, every time you make a plot with the label parameter and then call the axes.legend() function.
Here is an example
Here you are! You now know how to add a legend to your plot.
More on plots
If you want to know more about how to add labels, plot different types of plots, etc... check out the other articles I wrote on the topic, just here :