Найти сумму элементов каждой части

p1 = [c for r in matrix[:L] for c in r[:K]]
p2 = [c for r in matrix[:L] for c in r[K+1:]]
p3 = [c for r in matrix[L+1:] for c in r[:K]]
p4 = [c for r in matrix[L+1:] for c in r[K+1:]]

import random
 
n = [c for r in matrix[:L] for c in r[:K]]
m = [c for r in matrix[:L] for c in r[K+1:]]
l = [c for r in matrix[L+1:] for c in r[:K]]
k = [c for r in matrix[L+1:] for c in r[K+1:]]
n=int(input("Enter N: "));m=int(input("Enter M: "))
l=int(input("Enter L: "))-1;k=int(input("Enter K: "))-1
a=[];counter=[0,0,0,0];s=[0,0,0,0]
for i in range(n):
    a.append([])
    for j in range(m):
        a[i].append([])
        if i==l or j==k:
            a[i][j]=''
        else:
            a[i][j]=random.randrange(10, 99, 1)
for p in a:
    print(p)
 
for b in range(n):
    for c in range(m):
        if b<l and c<k:
            counter[0]+=1
            s[0]+=a[b][c]
        if b<l and c>k:
            counter[1]+=1
            s[1]+=a[b][c]
        if b>l and c<k:
            counter[2]+=1
            s[2]+=a[b][c]
        if b>l and c>k:
            counter[3]+=1
            s[3]+=a[b][c]
 
for z in range(len(counter)):
    print(s[z],"/",counter[z],"=",s[z]/counter[z])

from random import randint
 
 
def print_sum(p):
    print('{} = {}'.format('+'.join(map(str, p)), sum(p)))
 
N = 5
M = 5
 
A = [[randint(1, 9) for _ in range(M)] for _ in range(N)]
print(*A, sep='\n')
 
L = 2
K = 2
 
print()
print(*[[A[r][e] if (r != L and e != K) else 0 for e in range(M)] for r in range(N)], sep='\n')
 
print()
print_sum([c for r in A[:L] for c in r[:K]])
print_sum([c for r in A[:L] for c in r[K+1:]])
print_sum([c for r in A[L+1:] for c in r[:K]])
print_sum([c for r in A[L+1:] for c in r[K+1:]])