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+
+:mod:`grp` --- The group database
+=================================
+
+.. module:: grp
+   :platform: Unix
+   :synopsis: The group database (getgrnam() and friends).
+
+
+This module provides access to the Unix group database. It is available on all
+Unix versions.
+
+Group database entries are reported as a tuple-like object, whose attributes
+correspond to the members of the ``group`` structure (Attribute field below, see
+``<pwd.h>``):
+
++-------+-----------+---------------------------------+
+| Index | Attribute | Meaning                         |
++=======+===========+=================================+
+| 0     | gr_name   | the name of the group           |
++-------+-----------+---------------------------------+
+| 1     | gr_passwd | the (encrypted) group password; |
+|       |           | often empty                     |
++-------+-----------+---------------------------------+
+| 2     | gr_gid    | the numerical group ID          |
++-------+-----------+---------------------------------+
+| 3     | gr_mem    | all the group member's  user    |
+|       |           | names                           |
++-------+-----------+---------------------------------+
+
+The gid is an integer, name and password are strings, and the member list is a
+list of strings. (Note that most users are not explicitly listed as members of
+the group they are in according to the password database.  Check both databases
+to get complete membership information.)
+
+It defines the following items:
+
+
+.. function:: getgrgid(gid)
+
+   Return the group database entry for the given numeric group ID. :exc:`KeyError`
+   is raised if the entry asked for cannot be found.
+
+
+.. function:: getgrnam(name)
+
+   Return the group database entry for the given group name. :exc:`KeyError` is
+   raised if the entry asked for cannot be found.
+
+
+.. function:: getgrall()
+
+   Return a list of all available group entries, in arbitrary order.
+
+
+.. seealso::
+
+   Module :mod:`pwd`
+      An interface to the user database, similar to this.
+
+   Module :mod:`spwd`
+      An interface to the shadow password database, similar to this.
+