12.11.2 AddressList Objects An AddressList instance has the
following methods: Return the number of addresses in the address
list. Return a canonicalized string representation of the
address list. Addresses are rendered in "name" <host@domain>
form, comma-separated. Return a new AddressList instance that
contains all addresses in both AddressList operands, with
duplicates removed (set In-place version of __add__(); turns
this AddressList instance into the union of itself and the
right-hand instance, Return a new AddressList instance that
contains every address in the left-hand AddressList operand that
is not present in the right-hand address operand (set
difference). In-place version of __sub__(), removing addresses
in this list which are also in alist. Finally, AddressList
instances have one public instance variable: A list of tuple
string pairs, one per address. In each member, the first is the
canonicalized name part, the second is the actual route-address
("@"-separated username-host.domain See About this