<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def build_acl_ip(self, network_obj):
        "Build the acl for IP address. "

        if str(network_obj) == '0.0.0.0/0':
            acl = "any "
        else:
            acl = "%(ip)s %(mask)s " % {'ip': network_obj.network,
                                        'mask': network_obj.netmask}
        return acl