collapse_addresses

Collapse a list of IP objects.

Example:
    collapse_addresses([IPv4Network('192.0.2.0/25'),
                        IPv4Network('192.0.2.128/25')]) ->
                       [IPv4Network('192.0.2.0/24')]

Args:
    addresses: An iterable of IPv4Network or IPv6Network objects.

Returns:
    An iterator of the collapsed IPv(4|6)Network objects.

Raises:
    TypeError: If passed a list of mixed version objects.