import pandas as pd;
import numpy as np;
from datetime import date
import matplotlib.pyplot as plt; plt.rcdefaults()



sizes = np.full((10), 7, dtype=int);    
print(sizes);

from functools import reduce
product = reduce((lambda x, y: x * y), [1, 2, 3, 4])

[7 7 7 7 7 7 7 7 7 7]