get neighbors from a 2 dimensional array index in python

get neighbors from a 2 dimensional array index in python

def neighbors(matrix, rowNumber, colNumber):
    result = []
    for rowAdd in range(-1, 2):
        newRow = rowNumber + rowAdd
        if newRow >= 0 and newRow <= len(matrix)-1:
            for colAdd in range(-1, 2):
                newCol = colNumber + colAdd
                if newCol >= 0 and newCol <= len(matrix)-1:
                    if newCol == colNumber and newRow == rowNumber:
                        continue
                    result.append(matrix[newCol][newRow])
    return result