To plot multi-colored lines, like a rainbow, we can create a list of seven rainbow colors (VIBGYOR).
Steps
Create x for data points using numpy.
Create a list of colors (rainbow VIBGYOR).
Iterate in the range of colors list length.
Plot lines with x and y(x+i/20) using plot() method, with marker=o, linewidth=7 and colors[i] where i is the index.
To display the figure, use show() method.
Example
import numpy as np from matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True x = np.linspace(-1, 1, 10) colors = ["red", "orange", "yellow", "green", "blue", "indigo", "violet"] for i in range(len(colors)): plt.plot(x, x+i/20, c=colors[i], lw=7, marker='o') plt.show()