Using mplcursor for hover functionality in Bar Graph using Python

What You Will Learn

In this comprehensive guide, you will master the art of implementing hover functionality in a bar graph using the powerful mplcursor library in Python. By the end, you will be able to create interactive and engaging visualizations that provide additional insights with just a hover.

Introduction to the Problem and Solution

Visualizing data is crucial, but sometimes static graphs fall short in delivering detailed information without overwhelming the viewer. The solution lies in adding interactivity through hover functionality. By leveraging mplcursor, an exceptional library, we can effortlessly enhance our bar graphs with hover capabilities, allowing users to explore data points seamlessly.


import matplotlib.pyplot as plt
from mpldatacursor import datacursor

# Create a simple bar graph
x = ['A', 'B', 'C', 'D']
y = [10, 20, 15, 25], y)

# Add hover functionality using mplcursor library
datacursor(display='multiple', draggable=True)

# Copyright PHD

(Code snippet provided by


  • Import Libraries: Essential libraries are imported to kickstart the process.
  • Create Bar Graph: A basic bar graph is crafted using sample data for visualization.
  • Implement Hover Functionality: The datacursor() function from mpldatacursor is utilized to introduce interactive hovering on the plot.
    1. How does mplcursor enhance interactivity?

      • mplcursor enhances interactivity by providing cursor-based selection and annotation features on plots.
    2. Can I customize the appearance of the hover box?

      • Yes, you can customize parameters like font size, color, and information format displayed in the hover box.
    3. Is it possible to use mplcursor with other types of plots?

      • Certainly! mplcursor seamlessly integrates with various chart types supported by Matplotlib.
    4. Does mplcursor support click events besides hovering?

      • Yes, callbacks for mouse clicks can be configured within your visualization.
    5. Can I disable the drag feature for my cursor?

      • Absolutely! You have full control over enabling or disabling dragging capability as per your needs.

In conclusion, integrating hover functionality into your bar graphs using mplcursor opens up a world of interactive possibilities for data exploration. Empower your visualizations with this feature-rich library and captivate your audience with engaging plots that reveal insights at a glance.

For more advanced techniques and resources on Python programming and data visualization, visit

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