py lab 4

#1
def avg(arr):
    sum = 0
    for i in range(len(arr)):
        if arr[i] > 0:
            sum += arr[i]
    return sum / len(arr)


A = input("Enter array elements: ").split()
for i in range(len(A)):
    A[i] = int(A[i])
print(f"Result: {avg(A):.4f}")


#2
def print_matrix(arr):
  for i in range(len(arr)):
    for j in range(len(arr)):
      print(arr[i][j], end=' ')
    print()

N = 7
A = [[0 for j in range(N)] for i in range(N)]
for i in range(N):
  for j in range(N):
    if(i >= j):
      A[i][j] = N - i + j
    else:
      A[i][j] = N + i - j

print_matrix(A)