import pandas as pd

def mae(target, predictions):
    error = 0
    for i in range(target.shape[0]):
        error += abs(target - predictions)

    return error/ target.shape[0]
    # < напишите код здесь >

target = pd.Series([-0.5, 2.1, 1.5, 0.3])
predictions = pd.Series([-0.6, 1.7, 1.6, 0.2])

print(mae(target, predictions))