1 ### -*- coding: utf-8 -*- ####################################################

     2 ##############################################################################

     3 #

     4 # Copyright (c) 2012 Thierry Florac <tflorac AT ulthar.net>

     5 # All Rights Reserved.

     6 #

     7 # This software is subject to the provisions of the Zope Public License,

     8 # Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.

     9 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED

    10 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

    11 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS

    12 # FOR A PARTICULAR PURPOSE.

    13 #

    14 ##############################################################################

    15 

    16 

    17 # import standard packages

    18 

    19 # import Zope3 interfaces

    20 

    21 # import local interfaces

    22 

    23 # import Zope3 packages

    24 

    25 # import local packages

    26 

    27 

    28 def unique(seq, idfun=None):

    29     """Get list unique values, preserving order"""

    30     if idfun is None:

    31         def idfun(x): return x

    32     seen = {}

    33     result = []

    34     for item in seq:

    35         marker = idfun(item)

    36         if marker in seen:

    37             continue

    38         seen[marker] = 1

    39         result.append(item)

    40     return result