Plot a Python Dictionary in Order of Key Values
This tutorial explains how we can plot a dictionary in python using the pyplot module of matplotlib library of Python. We will plot the dictionary in key-value pair, where x-axis of the plot will be the key of the dictionary and the y-axis will be the value of the dictionary.
Plot a Python Dictionary Using the pyplot Module of matplotlib Library
The code example below converts the dictionary into a list of key-value pairs, then sorts it using the sorted function so that our graph is ordered. After sorting, x and y values are extracted from the list using the zip function.
After getting the x and y axes’ values, we could pass them as arguments to the plt.plot function for graph plotting.
Example code:
import matplotlib.pylab as plt
my_dict = { 'Khan': 4, 'Ali': 2, 'Luna': 6, 'Mark': 11, 'Pooja': 8, 'Sara': 1}
myList = my_dict.items()
myList = sorted(myList)
x, y = zip(*myList)
plt.plot(x, y)
plt.show()
Output:
We can also add labels to the x-axis and y-axis and a title to the graph. The code example below shows how we can add them to the graph.
import matplotlib.pylab as plt
my_dict = { 'Khan': 4, 'Ali': 2, 'Luna': 6, 'Mark': 11, 'Pooja': 8, 'Sara': 1}
myList = my_dict.items()
myList = sorted(myList)
x, y = zip(*myList)
plt.plot(x, y)
plt.xlabel('Key')
plt.ylabel('Value')
plt.title('My Dictionary')
plt.show()
Output:
