python graph

# importing the required module
import matplotlib.pyplot as plt
 
# x axis values
x = [1,2,3]
# corresponding y axis values
y = [2,4,1]
 
# plotting the points
plt.plot(x, y)
 
# naming the x axis
plt.xlabel('x - axis')
# naming the y axis
plt.ylabel('y - axis')
 
# giving a title to my graph
plt.title('My first graph!')
 
# function to show the plot
plt.show()

import matplotlib.pyplot as plt
plt.plot([1, 2, 3, 4], [1, 4, 9, 16])
plt.show()

from graphlib import TopologicalSorter

graph = {"Diane": {"Bob", "Cindy"}, "Cindy": {"Alice"}, "Bob": {"Alice"}}
# Alice → Bob → Diane
#     ↳ Cindy ↗

sorter = TopologicalSorter(graph)
list(sorter.static_order())
# ['Alice', 'Cindy', 'Bob', 'Diane']

    graph = {'A': ['B', 'C'],
             'B': ['C', 'D'],
             'C': ['D'],
             'D': ['C'],
             'E': ['F'],
             'F': ['C']}