# OO method basics
fig, ax = plt.subplots(figsize=(10,6))
# Plot the data,and save plot in a variable for customization of plot
scatter = ax.scatter(x=over_50["age"],
y=over_50["chol"],
c=over_50["target"])
# Customize the plot
ax.set(title="Heart Disease and Cholesterol Levels",
xlabel="Age",
ylabel="Cholesterol")
# Add a legend, here *unpacks every value,so must be used
ax.legend(*scatter.legend_elements(),title="Target");