def add_bean(beans=[]):
    beans.append(“bean”)
    return beans

print(add_bean())
print(add_bean())
print(add_bean([])

import matplotlib.pyplot as plt

x = [1, 2, 3, 4, 5]
y1 = [1, 2, 3, 4, 5]
y2 = [1.2, 2.2, 3.2, 3.8, 4.8]
plt.plot(x, y1)
plt.scatter(x, y2)

import matplotlib.pyplot as plt

x = [1, 2, 3, 4, 5]
y1 = [1, 2, 3, 4, 5]
y2 = [1.2, 2.2, 3.2, 3.8, 4.8]
plt.plot(x, y1)
plt.scatter(x, y2, color="C1")

import matplotlib.pyplot as plt

x = [1, 2, 3, 4, 5]
y = [1, 4, 9, 16, 25]
plt.plot(x, y)
plt.grid()
plt.xlabel("$x$")
plt.ylabel("$y$")
plt.title("$y = x^2$")

import matplotlib.pyplot as plt
import numpy as np

x = np.linspace(0, 4 * np.pi, 1000)
y = np.sin(x)
plt.scatter(x, y, c=y)