"ipaddress" --- IPv4/IPv6 manipulation library
**********************************************

**Code source :** Lib/ipaddress.py

======================================================================

"ipaddress" provides the capabilities to create, manipulate and
operate on IPv4 and IPv6 addresses and networks.

Les fonctions et les classes dans ce module facilitent la gestion de
différentes tâches reliée aux adresses IP, incluant vérifier si deux
hôtes sont sur le même sous-réseau, itérer sur tous les hôtes d'un
sous-réseau particulier, vérifier si une chaîne représente bien une
adresse IP ou une définition de réseau valide, et ainsi de suite.

Ceci est la référence complète de l'API du module, pour un aperçu et
introduction, voir Introduction au module ipaddress.

Ajouté dans la version 3.3.


Fonctions fabriques pratiques
=============================

The "ipaddress" module provides factory functions to conveniently
create IP addresses, networks and interfaces:

ipaddress.ip_address(address)

   Return an "IPv4Address" or "IPv6Address" object depending on the IP
   address passed as argument.  Either IPv4 or IPv6 addresses may be
   supplied; integers less than "2**32" will be considered to be IPv4
   by default. A "ValueError" is raised if *address* does not
   represent a valid IPv4 or IPv6 address.

   >>> ipaddress.ip_address('192.168.0.1')
   IPv4Address('192.168.0.1')
   >>> ipaddress.ip_address('2001:db8::')
   IPv6Address('2001:db8::')

ipaddress.ip_network(address, strict=True)

   Return an "IPv4Network" or "IPv6Network" object depending on the IP
   address passed as argument.  *address* is a string or integer
   representing the IP network.  Either IPv4 or IPv6 networks may be
   supplied; integers less than "2**32" will be considered to be IPv4
   by default.  *strict* is passed to "IPv4Network" or "IPv6Network"
   constructor.  A "ValueError" is raised if *address* does not
   represent a valid IPv4 or IPv6 address, or if the network has host
   bits set.

   >>> ipaddress.ip_network('192.168.0.0/28')
   IPv4Network('192.168.0.0/28')

ipaddress.ip_interface(address)

   Return an "IPv4Interface" or "IPv6Interface" object depending on
   the IP address passed as argument.  *address* is a string or
   integer representing the IP address.  Either IPv4 or IPv6 addresses
   may be supplied; integers less than "2**32" will be considered to
   be IPv4 by default.  A "ValueError" is raised if *address* does not
   represent a valid IPv4 or IPv6 address.

Un inconvénient de ces fonctions pratiques est que le besoin de gérer
à la fois IPv4 et IPv6 signifie que les messages d'erreur contiennent
peu d'information sur l'erreur précise puisqu'elles ne peuvent pas
deviner quel format entre IPv4 et IPv6 est voulu. Un compte-rendu
d'erreur plus détaillé peut être obtenu en appelant directement le
constructeur de classe pour la version voulue.


Adresses IP
===========


Objets adresse
--------------

Les objets "IPv4Address" et "IPv6Address" ont beaucoup d'attributs en
commun. Certains attributs qui n'ont du sens que pour des adresses
IPv6 sont aussi implémentés par les objets "IPv4Address" pour
faciliter l'écriture de code qui gère les 2 versions IP correctement.
Les objets d'adresse sont *hachables* pour qu'ils puissent être
utilisés comme des clés dans des dictionnaires.

class ipaddress.IPv4Address(address)

   Construit une adresse IPv4. Une exception "AddressValueError" est
   levée si *address* n'est pas une adresse IPv4 valide.

   Une adresse IPv4 valide est composée de :

   1. Une chaîne en notation décimale par points, composée de quatre
      entiers décimaux dans la plage inclusive 0—255, séparés par des
      points (p. ex. "192.168.0.1"). Chaque entier représente un octet
      dans l'adresse. Les zéros en tête ne sont pas tolérés pour
      éviter toute confusion avec la notation octale.

   2. Un entier qui tient dans 32 bits.

   3. Un entier tassé dans un objet "bytes" de taille 4 (gros-
      boutiste).

   >>> ipaddress.IPv4Address('192.168.0.1')
   IPv4Address('192.168.0.1')
   >>> ipaddress.IPv4Address(3232235521)
   IPv4Address('192.168.0.1')
   >>> ipaddress.IPv4Address(b'\xC0\xA8\x00\x01')
   IPv4Address('192.168.0.1')

   Modifié dans la version 3.8: Les zéros en tête sont tolérés, même
   dans les cas ambigus qui ont l'apparence de notation octal.

   Modifié dans la version 3.9.5: Les zéros en tête ne sont plus
   tolérés et seront traités comme une erreur. Les chaînes d'adresses
   IPv4 sont maintenant analysées aussi strictement que dans dans la
   fonction glibc "inet_pton()".

   version

      Numéro de version approprié : "4" pour IPv4, "6" pour IPv6.

      Modifié dans la version 3.14: Made available on the class.

   max_prefixlen

      Nombre total de bits dans la représentation d'adresse de cette
      version : "32" pour IPv4, "128" pour IPv6.

      Le préfixe définit le nombre de bits en tête dans une adresse
      qui sont comparés pour déterminer si une adresse fait partie
      d'un réseau.

      Modifié dans la version 3.14: Made available on the class.

   compressed

   exploded

      Une chaîne en notation décimale par points. Les zéros en tête ne
      sont jamais inclus dans la représentation.

      Comme IPv4 ne définit pas une notation abrégée pour les adresses
      avec des octets définis à zéro, ces deux attributs sont toujours
      identiques à "str(addr)" pour les adresses IPv4. Exposer ces
      attributs rend plus simple l'écriture de code d'affichage qui
      peut gérer à la fois les adresses IPv4 et IPv6.

   packed

      La représentation binaire de cette adresse — un objet "bytes"
      avec une taille appropriée (gros-boutiste). La taille est de 4
      octets pour IPv4 et 16 octets pour IPv6.

   reverse_pointer

      Nom de l'enregistrement DNS PTR inverse pour l'adresse IP, p. ex
      :

         >>> ipaddress.ip_address("127.0.0.1").reverse_pointer
         '1.0.0.127.in-addr.arpa'
         >>> ipaddress.ip_address("2001:db8::1").reverse_pointer
         '1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa'

      C'est le nom utilisé pour effectuer une recherche inverse PTR et
      non le nom de l'hôte résolu lui-même.

      Ajouté dans la version 3.5.

   is_multicast

      "True" si l'adresse est réservée pour utilisation *multicast*.
      Voir **RFC 3171** (pour IPv4) or **RFC 2373** (pour IPv6).

   is_private

      "True" if the address is defined as not globally reachable by
      iana-ipv4-special-registry (for IPv4) or iana-ipv6-special-
      registry (for IPv6) with the following exceptions:

      * "is_private" is "False" for the shared address space
        ("100.64.0.0/10")

      * For IPv4-mapped IPv6-addresses the "is_private" value is
        determined by the semantics of the underlying IPv4 addresses
        and the following condition holds (see
        "IPv6Address.ipv4_mapped"):

           address.is_private == address.ipv4_mapped.is_private

      "is_private" has value opposite to "is_global", except for the
      shared address space ("100.64.0.0/10" range) where they are both
      "False".

      Modifié dans la version 3.13: Fixed some false positives and
      false negatives.

      * "192.0.0.0/24" is considered private with the exception of
        "192.0.0.9/32" and "192.0.0.10/32" (previously: only the
        "192.0.0.0/29" sub-range was considered private).

      * "64:ff9b:1::/48" is considered private.

      * "2002::/16" is considered private.

      * There are exceptions within "2001::/23" (otherwise considered
        private): "2001:1::1/128", "2001:1::2/128", "2001:3::/32",
        "2001:4:112::/48", "2001:20::/28", "2001:30::/28". The
        exceptions are not considered private.

   is_global

      "True" if the address is defined as globally reachable by iana-
      ipv4-special-registry (for IPv4) or iana-ipv6-special-registry
      (for IPv6) with the following exception:

      For IPv4-mapped IPv6-addresses the "is_private" value is
      determined by the semantics of the underlying IPv4 addresses and
      the following condition holds (see "IPv6Address.ipv4_mapped"):

         address.is_global == address.ipv4_mapped.is_global

      "is_global" has value opposite to "is_private", except for the
      shared address space ("100.64.0.0/10" range) where they are both
      "False".

      Ajouté dans la version 3.4.

      Modifié dans la version 3.13: Fixed some false positives and
      false negatives, see "is_private" for details.

   is_unspecified

      "True" si l'adresse est non-spécifiée. Voir **RFC 5735** (pour
      IPv4) or **RFC 2373** (pour IPv6).

   is_reserved

      "True" if the address is noted as reserved by the IETF. For
      IPv4, this is only "240.0.0.0/4", the "Reserved" address block.
      For IPv6, this is all addresses allocated as "Reserved by IETF"
      for future use.

      Note:

        For IPv4, "is_reserved" is not related to the address block
        value of the "Reserved-by-Protocol" column in iana-ipv4
        -special-registry.

      Prudence:

        For IPv6, "fec0::/10" a former Site-Local scoped address
        prefix is currently excluded from that list (see
        "is_site_local" & **RFC 3879**).

   is_loopback

      "True" si c'est une adresse de rebouclage (*loopback* en
      anglais). Voir **RFC 3330** (pour IPv4) or **RFC 2373** (pour
      IPv6).

   is_link_local

      "True" si l'adresse est réservée pour les liaisons locales auto-
      configurées. Voir **RFC 3927**.

   ipv6_mapped

      "IPv4Address" object representing the IPv4-mapped IPv6 address.
      See **RFC 4291**.

      Ajouté dans la version 3.13.

IPv4Address.__format__(fmt)

   Renvoie l'adresse IP sous forme d'une chaîne, contrôlée par une
   chaîne de formatage explicite. *fmt* peut être : "'s'", l'option
   par défaut, équivalent à "str()", "'b'" pour une chaîne binaire
   préfixée par des zéros, "'X'" ou "'x'" pour une représentation
   hexadécimale majuscule ou minuscule, ou "'n'", équivalant à "'b'"
   pour les adresses IPv4 et "'x'" pour IPv6. Pour les représentations
   binaires et hexadécimales, le spécificateur de forme "'#'" et
   l'option de regroupement "'_'" sont disponibles. "__format__" est
   utilisé par "format", "str.format" et les f-strings.

   >>> format(ipaddress.IPv4Address('192.168.0.1'))
   '192.168.0.1'
   >>> '{:#b}'.format(ipaddress.IPv4Address('192.168.0.1'))
   '0b11000000101010000000000000000001'
   >>> f'{ipaddress.IPv6Address("2001:db8::1000"):s}'
   '2001:db8::1000'
   >>> format(ipaddress.IPv6Address('2001:db8::1000'), '_X')
   '2001_0DB8_0000_0000_0000_0000_0000_1000'
   >>> '{:#_n}'.format(ipaddress.IPv6Address('2001:db8::1000'))
   '0x2001_0db8_0000_0000_0000_0000_0000_1000'

   Ajouté dans la version 3.9.

class ipaddress.IPv6Address(address)

   Construit une adresse IPv6. Une "AddressValueError" est levée si
   *address* n'est pas une adresse IPv6 valide.

   Une adresse IPv6 valide est constituée de :

   1. Une chaîne constituée de huit groupes de quatre chiffres
      hexadécimaux, chaque groupe représentant 16 bits. Les groupes
      sont séparés par des deux-points. Ceci décrit une notation
      *éclatée* (longue). La chaîne peut-être aussi *abrégée*
      (notation courte) par différents moyens. Voir **RFC 4291** pour
      plus de détails. Par exemple,
      ""0000:0000:0000:0000:0000:0abc:0007:0def"" peut s'écrire
      ""::abc:7:def"".

      Optionnellement, la chaîne peut avoir un indice de zone de
      portée, exprimé avec un suffixe "%scope_id". Si présent,
      l'indice de portée ne doit pas être vide et ne doit pas contenir
      "%". Voir **RFC 4007** pour plus de détails. Par exemple,
      "fe80::1234%1" pourrait identifier "fe80::1234" sur la première
      interface du nœud.

   2. Un entier qui tient dans 128 bits.

   3. Un entier tassé dans un objet "bytes" de taille 16, gros-
      boutiste.

   >>> ipaddress.IPv6Address('2001:db8::1000')
   IPv6Address('2001:db8::1000')
   >>> ipaddress.IPv6Address('ff02::5678%1')
   IPv6Address('ff02::5678%1')

   compressed

   Version courte de la représentation d'adresse, avec les groupes de
   zéros en tête omis et la séquence la plus longue de groupes
   constitués entièrement de zéros réduit à un seul groupe vide.

   C'est aussi la valeur renvoyée par "str(addr)" pour les adresses
   IPv6.

   exploded

   Version longue de la représentation d'adresse, avec tous les zéros
   en tête et groupes composés entièrement de zéros inclus.

   Pour les attributs et méthodes suivants, voir la documentation de
   la classe "IPv4Address" :

   packed

   reverse_pointer

   version

   max_prefixlen

   is_multicast

   is_private

   is_global

      Ajouté dans la version 3.4.

   is_unspecified

   is_reserved

   is_loopback

   is_link_local

   is_site_local

      "True" si l'adresse est réservée pour usage sur réseau local.
      Notez que l'espace d'adressage sur réseau local a été rendu
      obsolète par **RFC 3879**. Utilisez "is_private" pour tester si
      l'adresse est dans l'espace d'adresses locales et uniques défini
      par **RFC 4193**.

   ipv4_mapped

      For addresses that appear to be IPv4 mapped addresses in the
      range "::FFFF:0:0/96" as defined by **RFC 4291**, this property
      reports the embedded IPv4 address. For any other address, this
      property will be "None".

   scope_id

      Pour les adresses avec une portée spécifiée comme définies par
      **RFC 4007**, cette propriété identifie la zone précise de la
      portée d'adresse à laquelle cette adresse appartient, en tant
      que chaîne. Quand la zone de portée n'est pas spécifiée, cette
      propriété est "None".

   sixtofour

      Pour les adresses qui semblent être des adresses *6to4*
      (commençant par "2002::/16") tel que défini par **RFC 3056**,
      cette propriété rapporte l'adresse IPv4 imbriquée. Pour toute
      autre adresse, cette propriété sera "None".

   teredo

      Pour les adresses qui semblent être des adresses *Teredo*
      (commençant par "2001::/32") tel que défini par **RFC 4380**,
      cette propriété rapporte la paire "(server, client)" imbriquée.
      Pour toute autre adresse, cette propriété sera "None".

IPv6Address.__format__(fmt)

   Référez-vous à la documentation de la méthode correspondante dans
   "IPv4Address".

   Ajouté dans la version 3.9.


Conversion vers les chaînes et les entiers
------------------------------------------

Afin d'interagir avec les API de réseau tels que le module socket, les
adresses doivent être converties en chaînes et en entiers. Ceci est
géré en utilisant les fonctions natives "str()" et "int()" :

   >>> str(ipaddress.IPv4Address('192.168.0.1'))
   '192.168.0.1'
   >>> int(ipaddress.IPv4Address('192.168.0.1'))
   3232235521
   >>> str(ipaddress.IPv6Address('::1'))
   '::1'
   >>> int(ipaddress.IPv6Address('::1'))
   1

Note that IPv6 scoped addresses are converted to integers without
scope zone ID.


Opérateurs
----------

Address objects support some operators.  Unless stated otherwise,
operators can only be applied between compatible objects (i.e. IPv4
with IPv4, IPv6 with IPv6).


Opérateurs de comparaison
~~~~~~~~~~~~~~~~~~~~~~~~~

Address objects can be compared with the usual set of comparison
operators. Same IPv6 addresses with different scope zone IDs are not
equal. Some examples:

   >>> IPv4Address('127.0.0.2') > IPv4Address('127.0.0.1')
   True
   >>> IPv4Address('127.0.0.2') == IPv4Address('127.0.0.1')
   False
   >>> IPv4Address('127.0.0.2') != IPv4Address('127.0.0.1')
   True
   >>> IPv6Address('fe80::1234') == IPv6Address('fe80::1234%1')
   False
   >>> IPv6Address('fe80::1234%1') != IPv6Address('fe80::1234%2')
   True


Opérateurs arithmétiques
~~~~~~~~~~~~~~~~~~~~~~~~

Les entiers peuvent être additionnés ou soustraits des objets
d'adresse. Quelques exemples :

   >>> IPv4Address('127.0.0.2') + 3
   IPv4Address('127.0.0.5')
   >>> IPv4Address('127.0.0.2') - 3
   IPv4Address('126.255.255.255')
   >>> IPv4Address('255.255.255.255') + 1
   Traceback (most recent call last):
     File "<stdin>", line 1, in <module>
   ipaddress.AddressValueError: 4294967296 (>= 2**32) is not permitted as an IPv4 address


Définitions de réseaux IP
=========================

The "IPv4Network" and "IPv6Network" objects provide a mechanism for
defining and inspecting IP network definitions.  A network definition
consists of a *mask* and a *network address*, and as such defines a
range of IP addresses that equal the network address when masked
(binary AND) with the mask.  For example, a network definition with
the mask "255.255.255.0" and the network address "192.168.1.0"
consists of IP addresses in the inclusive range "192.168.1.0" to
"192.168.1.255".


Préfixe, masque réseau et masque de l'hôte
------------------------------------------

There are several equivalent ways to specify IP network masks.  A
*prefix* "/<nbits>" is a notation that denotes how many high-order
bits are set in the network mask.  A *net mask* is an IP address with
some number of high-order bits set.  Thus the prefix "/24" is
equivalent to the net mask "255.255.255.0" in IPv4, or "ffff:ff00::"
in IPv6.  In addition, a *host mask* is the logical inverse of a *net
mask*, and is sometimes used (for example in Cisco access control
lists) to denote a network mask.  The host mask equivalent to "/24" in
IPv4 is "0.0.0.255".


Objets réseau
-------------

All attributes implemented by address objects are implemented by
network objects as well.  In addition, network objects implement
additional attributes. All of these are common between "IPv4Network"
and "IPv6Network", so to avoid duplication they are only documented
for "IPv4Network". Network objects are *hashable*, so they can be used
as keys in dictionaries.

class ipaddress.IPv4Network(address, strict=True)

   Construit une définition de réseau IPv4. *address* peut valoir :

   1. A string consisting of an IP address and an optional mask,
      separated by a slash ("/").  The IP address is the network
      address, and the mask can be either a single number, which means
      it's a *prefix*, or a string representation of an IPv4 address.
      If it's the latter, the mask is interpreted as a *net mask* if
      it starts with a non-zero field, or as a *host mask* if it
      starts with a zero field, with the single exception of an all-
      zero mask which is treated as a *net mask*.  If no mask is
      provided, it's considered to be "/32".

      For example, the following *address* specifications are
      equivalent: "192.168.1.0/24", "192.168.1.0/255.255.255.0" and
      "192.168.1.0/0.0.0.255".

   2. An integer that fits into 32 bits.  This is equivalent to a
      single-address network, with the network address being *address*
      and the mask being "/32".

   3. An integer packed into a "bytes" object of length 4, big-endian.
      The interpretation is similar to an integer *address*.

   4. A two-tuple of an address description and a netmask, where the
      address description is either a string, a 32-bits integer, a
      4-bytes packed integer, or an existing "IPv4Address" object; and
      the netmask is either an integer representing the prefix length
      (e.g. "24") or a string representing the prefix mask (e.g.
      "255.255.255.0").

   An "AddressValueError" is raised if *address* is not a valid IPv4
   address.  A "NetmaskValueError" is raised if the mask is not valid
   for an IPv4 address.

   If *strict* is "True" and host bits are set in the supplied
   address, then "ValueError" is raised.  Otherwise, the host bits are
   masked out to determine the appropriate network address.

   Unless stated otherwise, all network methods accepting other
   network/address objects will raise "TypeError" if the argument's IP
   version is incompatible to "self".

   Modifié dans la version 3.5: Ajout de la forme paire pour le
   paramètre *address* du constructeur.

   version

   max_prefixlen

      Référez-vous à la documentation de l'attribut correspondant dans
      "IPv4Address".

   is_multicast

   is_private

   is_unspecified

   is_reserved

   is_loopback

   is_link_local

      These attributes are true for the network as a whole if they are
      true for both the network address and the broadcast address.

   network_address

      The network address for the network. The network address and the
      prefix length together uniquely define a network.

   broadcast_address

      The broadcast address for the network. Packets sent to the
      broadcast address should be received by every host on the
      network.

   hostmask

      Le masque de l'hôte, en tant qu'objet "IPv4Address".

   netmask

      Le masque réseau, en tant qu'objet "IPv4Address".

   with_prefixlen

   compressed

   exploded

      Adresse IP du réseau sous forme d'une chaîne, avec le masque en
      notation CIDR.

      "with_prefixlen" and "compressed" are always the same as
      "str(network)". "exploded" uses the exploded form the network
      address.

   with_netmask

      A string representation of the network, with the mask in net
      mask notation.

   with_hostmask

      A string representation of the network, with the mask in host
      mask notation.

   num_addresses

      Le nombre total d'adresses dans le réseau.

   prefixlen

      Length of the network prefix, in bits.

   hosts()

      Returns an iterator over the usable hosts in the network.  The
      usable hosts are all the IP addresses that belong to the
      network, except the network address itself and the network
      broadcast address.  For networks with a mask length of 31, the
      network address and network broadcast address are also included
      in the result. Networks with a mask of 32 will return a list
      containing the single host address.

      >>> list(ip_network('192.0.2.0/29').hosts())
      [IPv4Address('192.0.2.1'), IPv4Address('192.0.2.2'),
       IPv4Address('192.0.2.3'), IPv4Address('192.0.2.4'),
       IPv4Address('192.0.2.5'), IPv4Address('192.0.2.6')]
      >>> list(ip_network('192.0.2.0/31').hosts())
      [IPv4Address('192.0.2.0'), IPv4Address('192.0.2.1')]
      >>> list(ip_network('192.0.2.1/32').hosts())
      [IPv4Address('192.0.2.1')]

   overlaps(other)

      "True" si ce réseau est partiellement ou complètement contenu
      dans *other* ou *other* est complètement contenu dans ce réseau.

   address_exclude(network)

      Computes the network definitions resulting from removing the
      given *network* from this one.  Returns an iterator of network
      objects. Raises "ValueError" if *network* is not completely
      contained in this network.

      >>> n1 = ip_network('192.0.2.0/28')
      >>> n2 = ip_network('192.0.2.1/32')
      >>> list(n1.address_exclude(n2))
      [IPv4Network('192.0.2.8/29'), IPv4Network('192.0.2.4/30'),
       IPv4Network('192.0.2.2/31'), IPv4Network('192.0.2.0/32')]

   subnets(prefixlen_diff=1, new_prefix=None)

      The subnets that join to make the current network definition,
      depending on the argument values.  *prefixlen_diff* is the
      amount our prefix length should be increased by.  *new_prefix*
      is the desired new prefix of the subnets; it must be larger than
      our prefix.  One and only one of *prefixlen_diff* and
      *new_prefix* must be set.  Returns an iterator of network
      objects.

      >>> list(ip_network('192.0.2.0/24').subnets())
      [IPv4Network('192.0.2.0/25'), IPv4Network('192.0.2.128/25')]
      >>> list(ip_network('192.0.2.0/24').subnets(prefixlen_diff=2))
      [IPv4Network('192.0.2.0/26'), IPv4Network('192.0.2.64/26'),
       IPv4Network('192.0.2.128/26'), IPv4Network('192.0.2.192/26')]
      >>> list(ip_network('192.0.2.0/24').subnets(new_prefix=26))
      [IPv4Network('192.0.2.0/26'), IPv4Network('192.0.2.64/26'),
       IPv4Network('192.0.2.128/26'), IPv4Network('192.0.2.192/26')]
      >>> list(ip_network('192.0.2.0/24').subnets(new_prefix=23))
      Traceback (most recent call last):
        File "<stdin>", line 1, in <module>
          raise ValueError('new prefix must be longer')
      ValueError: new prefix must be longer
      >>> list(ip_network('192.0.2.0/24').subnets(new_prefix=25))
      [IPv4Network('192.0.2.0/25'), IPv4Network('192.0.2.128/25')]

   supernet(prefixlen_diff=1, new_prefix=None)

      The supernet containing this network definition, depending on
      the argument values.  *prefixlen_diff* is the amount our prefix
      length should be decreased by.  *new_prefix* is the desired new
      prefix of the supernet; it must be smaller than our prefix.  One
      and only one of *prefixlen_diff* and *new_prefix* must be set.
      Returns a single network object.

      >>> ip_network('192.0.2.0/24').supernet()
      IPv4Network('192.0.2.0/23')
      >>> ip_network('192.0.2.0/24').supernet(prefixlen_diff=2)
      IPv4Network('192.0.0.0/22')
      >>> ip_network('192.0.2.0/24').supernet(new_prefix=20)
      IPv4Network('192.0.0.0/20')

   subnet_of(other)

      Renvoie "True" si ce réseau est un sous-réseau de *other*.

      >>> a = ip_network('192.168.1.0/24')
      >>> b = ip_network('192.168.1.128/30')
      >>> b.subnet_of(a)
      True

      Ajouté dans la version 3.7.

   supernet_of(other)

      Renvoie "True" si *other* est un sous-réseau de ce réseau.

      >>> a = ip_network('192.168.1.0/24')
      >>> b = ip_network('192.168.1.128/30')
      >>> a.supernet_of(b)
      True

      Ajouté dans la version 3.7.

   compare_networks(other)

      Compare this network to *other*.  In this comparison only the
      network addresses are considered; host bits aren't.  Returns
      either "-1", "0" or "1".

      >>> ip_network('192.0.2.1/32').compare_networks(ip_network('192.0.2.2/32'))
      -1
      >>> ip_network('192.0.2.1/32').compare_networks(ip_network('192.0.2.0/32'))
      1
      >>> ip_network('192.0.2.1/32').compare_networks(ip_network('192.0.2.1/32'))
      0

      Obsolète depuis la version 3.7: Utilise le même algorithme de
      relation d'ordre et de comparaison que "<", "==", et ">".

class ipaddress.IPv6Network(address, strict=True)

   Construit une définition de réseau IPv6. *address* peut valoir :

   1. A string consisting of an IP address and an optional prefix
      length, separated by a slash ("/").  The IP address is the
      network address, and the prefix length must be a single number,
      the *prefix*.  If no prefix length is provided, it's considered
      to be "/128".

      Note that currently expanded netmasks are not supported.  That
      means "2001:db00::0/24" is a valid argument while
      "2001:db00::0/ffff:ff00::" is not.

   2. An integer that fits into 128 bits.  This is equivalent to a
      single-address network, with the network address being *address*
      and the mask being "/128".

   3. An integer packed into a "bytes" object of length 16, big-
      endian. The interpretation is similar to an integer *address*.

   4. A two-tuple of an address description and a netmask, where the
      address description is either a string, a 128-bits integer, a
      16-bytes packed integer, or an existing "IPv6Address" object;
      and the netmask is an integer representing the prefix length.

   An "AddressValueError" is raised if *address* is not a valid IPv6
   address.  A "NetmaskValueError" is raised if the mask is not valid
   for an IPv6 address.

   If *strict* is "True" and host bits are set in the supplied
   address, then "ValueError" is raised.  Otherwise, the host bits are
   masked out to determine the appropriate network address.

   Modifié dans la version 3.5: Ajout de la forme paire pour le
   paramètre *address* du constructeur.

   version

   max_prefixlen

   is_multicast

   is_private

   is_unspecified

   is_reserved

   is_loopback

   is_link_local

   network_address

   broadcast_address

   hostmask

   netmask

   with_prefixlen

   compressed

   exploded

   with_netmask

   with_hostmask

   num_addresses

   prefixlen

   hosts()

      Returns an iterator over the usable hosts in the network.  The
      usable hosts are all the IP addresses that belong to the
      network, except the Subnet-Router anycast address.  For networks
      with a mask length of 127, the Subnet-Router anycast address is
      also included in the result. Networks with a mask of 128 will
      return a list containing the single host address.

   overlaps(other)

   address_exclude(network)

   subnets(prefixlen_diff=1, new_prefix=None)

   supernet(prefixlen_diff=1, new_prefix=None)

   subnet_of(other)

   supernet_of(other)

   compare_networks(other)

      Référez-vous à la documentation de l'attribut correspondant dans
      "IPv4Network".

   is_site_local

      This attribute is true for the network as a whole if it is true
      for both the network address and the broadcast address.


Opérateurs
----------

Network objects support some operators.  Unless stated otherwise,
operators can only be applied between compatible objects (i.e. IPv4
with IPv4, IPv6 with IPv6).


Opérateurs logiques
~~~~~~~~~~~~~~~~~~~

Network objects can be compared with the usual set of logical
operators. Network objects are ordered first by network address, then
by net mask.


Itération
~~~~~~~~~

Network objects can be iterated to list all the addresses belonging to
the network.  For iteration, *all* hosts are returned, including
unusable hosts (for usable hosts, use the "hosts()" method).  An
example:

   >>> for addr in IPv4Network('192.0.2.0/28'):
   ...     addr
   ...
   IPv4Address('192.0.2.0')
   IPv4Address('192.0.2.1')
   IPv4Address('192.0.2.2')
   IPv4Address('192.0.2.3')
   IPv4Address('192.0.2.4')
   IPv4Address('192.0.2.5')
   IPv4Address('192.0.2.6')
   IPv4Address('192.0.2.7')
   IPv4Address('192.0.2.8')
   IPv4Address('192.0.2.9')
   IPv4Address('192.0.2.10')
   IPv4Address('192.0.2.11')
   IPv4Address('192.0.2.12')
   IPv4Address('192.0.2.13')
   IPv4Address('192.0.2.14')
   IPv4Address('192.0.2.15')


Réseaux en tant que conteneurs d'adresses
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Les objets réseau peuvent agir en tant que conteneurs d'adresses.
Quelques exemples :

   >>> IPv4Network('192.0.2.0/28')[0]
   IPv4Address('192.0.2.0')
   >>> IPv4Network('192.0.2.0/28')[15]
   IPv4Address('192.0.2.15')
   >>> IPv4Address('192.0.2.6') in IPv4Network('192.0.2.0/28')
   True
   >>> IPv4Address('192.0.3.6') in IPv4Network('192.0.2.0/28')
   False


Objets interface
================

Les objets interface sont *hachables*, ce qui signifie qu'ils peuvent
être utilisés comme clés de dictionnaire.

class ipaddress.IPv4Interface(address)

   Construct an IPv4 interface.  The meaning of *address* is as in the
   constructor of "IPv4Network", except that arbitrary host addresses
   are always accepted.

   "IPv4Interface" is a subclass of "IPv4Address", so it inherits all
   the attributes from that class.  In addition, the following
   attributes are available:

   ip

      L'adresse ("IPv4Address") sans information de réseau.

      >>> interface = IPv4Interface('192.0.2.5/24')
      >>> interface.ip
      IPv4Address('192.0.2.5')

   network

      Le réseau ("IPv4Network") auquel cette interface appartient.

      >>> interface = IPv4Interface('192.0.2.5/24')
      >>> interface.network
      IPv4Network('192.0.2.0/24')

   with_prefixlen

      A string representation of the interface with the mask in prefix
      notation.

      >>> interface = IPv4Interface('192.0.2.5/24')
      >>> interface.with_prefixlen
      '192.0.2.5/24'

   with_netmask

      A string representation of the interface with the network as a
      net mask.

      >>> interface = IPv4Interface('192.0.2.5/24')
      >>> interface.with_netmask
      '192.0.2.5/255.255.255.0'

   with_hostmask

      A string representation of the interface with the network as a
      host mask.

      >>> interface = IPv4Interface('192.0.2.5/24')
      >>> interface.with_hostmask
      '192.0.2.5/0.0.0.255'

class ipaddress.IPv6Interface(address)

   Construct an IPv6 interface.  The meaning of *address* is as in the
   constructor of "IPv6Network", except that arbitrary host addresses
   are always accepted.

   "IPv6Interface" is a subclass of "IPv6Address", so it inherits all
   the attributes from that class.  In addition, the following
   attributes are available:

   ip

   network

   with_prefixlen

   with_netmask

   with_hostmask

      Référez-vous à la documentation de l'attribut correspondant dans
      "IPv4Interface".


Opérateurs
----------

Interface objects support some operators.  Unless stated otherwise,
operators can only be applied between compatible objects (i.e. IPv4
with IPv4, IPv6 with IPv6).


Opérateurs logiques
~~~~~~~~~~~~~~~~~~~

Interface objects can be compared with the usual set of logical
operators.

For equality comparison ("==" and "!="), both the IP address and
network must be the same for the objects to be equal.  An interface
will not compare equal to any address or network object.

For ordering ("<", ">", etc) the rules are different.  Interface and
address objects with the same IP version can be compared, and the
address objects will always sort before the interface objects.  Two
interface objects are first compared by their networks and, if those
are the same, then by their IP addresses.


Autres fonctions au niveau de module
====================================

Le module fournit aussi les fonctions suivantes :

ipaddress.v4_int_to_packed(address)

   Represent an address as 4 packed bytes in network (big-endian)
   order. *address* is an integer representation of an IPv4 IP
   address.  A "ValueError" is raised if the integer is negative or
   too large to be an IPv4 IP address.

   >>> ipaddress.ip_address(3221225985)
   IPv4Address('192.0.2.1')
   >>> ipaddress.v4_int_to_packed(3221225985)
   b'\xc0\x00\x02\x01'

ipaddress.v6_int_to_packed(address)

   Represent an address as 16 packed bytes in network (big-endian)
   order. *address* is an integer representation of an IPv6 IP
   address.  A "ValueError" is raised if the integer is negative or
   too large to be an IPv6 IP address.

ipaddress.summarize_address_range(first, last)

   Return an iterator of the summarized network range given the first
   and last IP addresses.  *first* is the first "IPv4Address" or
   "IPv6Address" in the range and *last* is the last "IPv4Address" or
   "IPv6Address" in the range.  A "TypeError" is raised if *first* or
   *last* are not IP addresses or are not of the same version.  A
   "ValueError" is raised if *last* is not greater than *first* or if
   *first* address version is not 4 or 6.

   >>> [ipaddr for ipaddr in ipaddress.summarize_address_range(
   ...    ipaddress.IPv4Address('192.0.2.0'),
   ...    ipaddress.IPv4Address('192.0.2.130'))]
   [IPv4Network('192.0.2.0/25'), IPv4Network('192.0.2.128/31'), IPv4Network('192.0.2.130/32')]

ipaddress.collapse_addresses(addresses)

   Return an iterator of the collapsed "IPv4Network" or "IPv6Network"
   objects.  *addresses* is an *iterable* of "IPv4Network" or
   "IPv6Network" objects.  A "TypeError" is raised if *addresses*
   contains mixed version objects.

   >>> [ipaddr for ipaddr in
   ... ipaddress.collapse_addresses([ipaddress.IPv4Network('192.0.2.0/25'),
   ... ipaddress.IPv4Network('192.0.2.128/25')])]
   [IPv4Network('192.0.2.0/24')]

ipaddress.get_mixed_type_key(obj)

   Return a key suitable for sorting between networks and addresses.
   Address and Network objects are not sortable by default; they're
   fundamentally different, so the expression:

      IPv4Address('192.0.2.0') <= IPv4Network('192.0.2.0/24')

   doesn't make sense.  There are some times however, where you may
   wish to have "ipaddress" sort these anyway.  If you need to do
   this, you can use this function as the *key* argument to
   "sorted()".

   *obj* est un objet réseau ou adresse.


Exceptions personnalisées
=========================

To support more specific error reporting from class constructors, the
module defines the following exceptions:

exception ipaddress.AddressValueError(ValueError)

   Toute erreur de valeur liée à l'adresse.

exception ipaddress.NetmaskValueError(ValueError)

   Toute erreur de valeur liée au masque réseau.
