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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_vip_settings(vip):
 """Calculate which nic is on the correct network for the given vip. If nic or netmask discovery fail then fallback to using charm supplied config. If fallback is used this is indicated via the fallback variable. @param vip: VIP to lookup nic and cidr for. @returns (str, str, bool):
 eg (iface, netmask, fallback) """

    iface = get_iface_for_address(vip)
    netmask = get_netmask_for_address(vip)
    fallback = False
    if iface is None:
        iface = config('vip_iface')
        fallback = True
    if netmask is None:
        netmask = config('vip_cidr')
        fallback = True
    return iface, netmask, fallback