Nested layout using row and column layouts

A nested layout is the combination of multiple row and column layouts. Let's see the example given here for a better practical understanding:

# Import the required modules
from bokeh.plotting import figure, output_notebook, show

# Import the required modules
from bokeh.plotting import figure
from bokeh.plotting import output_notebook
from bokeh.plotting import show
from bokeh.layouts import row, column


# Import iris flower dataset as pandas DataFrame
from bokeh.sampledata.iris import flowers as df

# Output to notebook
output_notebook()

# Instantiate a figure
fig1 = figure(plot_width = 300, plot_height = 300)
fig2 = figure(plot_width = 300, plot_height = 300)
fig3 = figure(plot_width = 300, plot_height = 300)

# Create scatter marker plot by render the circles
fig1.circle(df['petal_length'], df['sepal_length'], size=8, color = "green", alpha = 0.5)
fig2.circle(df['petal_length'], df['sepal_width'], size=8,...