用python写一段代码，随意给两个ip地址和一个子网掩码，判断两个IP地址如果配置该子网掩码，是否属于同一子网(局域网)? 注意:子网掩码不保证是正确的。

以下是实现此功能的 Python 代码：

import ipaddress

def check_same_subnet(ip1, ip2, subnet_mask):
    """
    Check if two IP addresses belong to the same subnet.
    :param ip1: first IP address
    :param ip2: second IP address
    :param subnet_mask: subnet mask
    :return: True if both IPs belong to the same subnet, False otherwise
    """
    ip1 = ipaddress.ip_address(ip1)
    ip2 = ipaddress.ip_address(ip2)
    subnet_mask = ipaddress.ip_address(subnet_mask)

    # Get the network address of the IPs using the subnet mask
    net1 = ipaddress.ip_network(str(ip1) + '/' + str(subnet_mask), strict=False)
    net2 = ipaddress.ip_network(str(ip2) + '/' + str(subnet_mask), strict=False)

    # Compare the network addresses
    if net1.network_address == net2.network_address:
        return True
    else:
        return False

使用示例：

ip1 = '192.168.1.100'
ip2 = '192.168.1.200'
subnet_mask = '255.255.255.0'

if check_same_subnet(ip1, ip2, subnet_mask):
    print('Both IPs belong to the same subnet')
else:
    print('Both IPs do not belong to the same subnet')