Matplotlib Example

import matplotlib.pyplot as plt

X = [x * 0.5 for x in range(0, 21)]
Y = [x * x for x in X]

plt.figure(figsize=(10, 8))

plt.title('Кусок параболы')
plt.grid(True)
plt.xticks(range(11))
plt.yticks(range(0, 101, 10))

plt.plot(X, Y, marker='o', color='y', linestyle=':')
plt.show()