from funcnotation import PrePostFix as P
# find the sum of 8 random integers squared
P(sum) @ ([randint(0, 10) for _ in range(8)] // P(lambda x: [i**2 for i in x]))

from funcnotation import PrePostFix as P
import numpy as np

def reshape(*size):
    def f(x):
        return np.reshape(x, size=size)
    return P(f)
    
[1,2,3,4] // reshape(2,2)

# array([[1, 2],
#        [3, 4]])