在python中开发打印网格的函数

def print_grid(rows, cols):
    for i in range(rows):
        # 打印横向边界
        print('+', end='')
        for j in range(cols):
            print('---+', end='')
        print()

        # 打印纵向边界和空格
        print('|', end='')
        for j in range(cols):
            print('   |', end='')
        print()

    # 打印最后一行的横向边界
    print('+', end='')
    for j in range(cols):
        print('---+', end='')
    print()