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| -rw-r--r-- | Doc/library/collections.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst index f07ac2535b..361da71430 100644 --- a/Doc/library/collections.rst +++ b/Doc/library/collections.rst @@ -567,6 +567,16 @@ by the :mod:`csv` or :mod:`sqlite3` modules:: for emp in map(EmployeeRecord._make, cursor.fetchall()): print emp.name, emp.title +Named tuples can also be used to generate enumerated constants: + +.. testcode:: + + def enum(*names): + return namedtuple('Enum', ' '.join(names))(*range(len(names))) + + Status = enum('open', 'pending', 'closed') + assert (0, 1, 2) == (Status.open, Status.pending, Status.closed) + In addition to the methods inherited from tuples, named tuples support three additional methods and one attribute. To prevent conflicts with field names, the method and attribute names start with an underscore. |