How to annotate the end of lines using Python and Matplotlib?

To annotate the end of lines using Python and Matplotlib, we can take the following steps −

Set the figure size and adjust the padding between and around the subplots.
Initalize a variable, rows, to get the number of rows data.
Get a Pandas dataframe in a rectangular tabular data.
Calculate the cumsum (cumulative sum) of the dataframe.
Plot the dataframe using plot() method.
Iterate line and name to annotate the end of lines.
Use annotate() method with column's name, xy co-ordinates, color of the lines, sizes, etc.
Place a legend on the figure.
To display the figure, use show() method.

Example

import pandas as pd
import numpy as np
import matplotlib.pyplot as plt

plt.rcParams["figure.figsize"] = [7.50, 3.50]
plt.rcParams["figure.autolayout"] = True

rows = 75

df = pd.DataFrame(np.random.randint(-5, 5, size=(rows, 3)),
columns=['A', 'B', 'C'])
df = df.cumsum()
ax = df.plot()

for line, name in zip(ax.lines, df.columns):
      y = line.get_ydata()[-1]
      ax.annotate(name, xy=(1, y), xytext=(6, 0),
                  color=line.get_color(), xycoords=ax.get_yaxis_transform(),
                  textcoords="offset points", size=14, va="center")

plt.legend(loc='lower left')
plt.show()