[Solved] Given the code below, what will be the output type?import holoviews as hv import datashader as ds hv.extension('bokeh') data = [(i, i**2) for i in range(1000000)] points = hv.Points(data) shaded = ds.... | Matplotlib

Matplotlib - Performance and Large Data

Given the code below, what will be the output type?

import holoviews as hv
import datashader as ds
hv.extension('bokeh')
data = [(i, i**2) for i in range(1000000)]
points = hv.Points(data)
shaded = ds.Canvas().shade(points)
print(type(shaded))

A<class 'holoviews.core.element.Points'>

B<class 'datashader.transfer_functions.Image'>

C<class 'bokeh.plotting.figure.Figure'>

D<class 'matplotlib.figure.Figure'>

Step-by-Step Solution

Solution:

Step 1: Understand what ds.Canvas().shade() returns
Datashader's shade method returns an Image object representing the rasterized plot.
Step 2: Identify the output type
The printed type is datashader.transfer_functions.Image, not a HoloViews or Bokeh figure.
Final Answer:
<class 'datashader.transfer_functions.Image'> -> Option B
Quick Check:
Datashader shade output = Image object [OK]

Quick Trick: Datashader shade returns an Image object, not a plot figure [OK]

Common Mistakes:

Expecting a HoloViews Points object
Confusing with Bokeh or Matplotlib figure types
Assuming shade returns a plot directly

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More Matplotlib Quizzes

Given the code below, what will be the output type?

Step 1: Understand what ds.Canvas().shade() returns

Step 2: Identify the output type

Final Answer:

Quick Check:

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