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Source Code for Module fuzzy.norm.ParametricNorm

 1  # -*- coding: utf-8 -*- 
 2  # 
 3  # Copyright (C) 2009  Rene Liebscher 
 4  # 
 5  # This program is free software; you can redistribute it and/or modify it under 
 6  # the terms of the GNU Lesser General Public License as published by the Free  
 7  # Software Foundation; either version 3 of the License, or (at your option) any 
 8  # later version. 
 9  # 
10  # This program is distributed in the hope that it will be useful, but WITHOUT  
11  # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 
12  # FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more 
13  # details. 
14  #  
15  # You should have received a copy of the GNU Lesser General Public License 
16  # along with this program; if not, see <http://www.gnu.org/licenses/>.  
17  # 
18  """  
19      Base class for any kind of parametric fuzzy norm. 
20  """ 
21   
22  __revision__ = "$Id: ParametricNorm.py,v 1.16 2010-10-29 19:24:41 rliebscher Exp $" 
23   
24  from fuzzy.norm.Norm import Norm 
25  from fuzzy.utils import prop 
26   
27 -class ParametricNorm(Norm): 
28      """Abstract base class for any parametric fuzzy norm 
29       
30      @ivar p: parameter for norm 
31      @type p: float 
32      """ 
33      _range = None 
34   
35 -    def __init__(self, type, param): 
36          """Initialize type and parameter 
37           
38          @param param: parameter for norm 
39          @type param: float 
40          """ 
41          super(ParametricNorm, self).__init__(type) 
42          self.p = param 
43   
44      # pylint: disable=E0202,E0211 
45      #ID:E0202 ParametricNorm.p: An attribute inherited from ParametricNorm hide this method 
46      #ID:E0211 TParametricNorm.p: Method has no argument 
47      @prop 
48 -    def p(): #@NoSelf 
49          """x 
50          @type: float""" 
51          def fget(self): # pylint: disable=W0612,C0111 
52              return self._p 
53          def fset(self, value): # pylint: disable=W0612,C0111 
54              self._checkParam(value) 
55              self._p = value 
56          return locals() 
57   
58      # pylint: disable=E0211 
59      #ID:E0211 TParametricNorm.p_range: Method has no argument 
60      @prop 
61 -    def p_range(): #@NoSelf 
62          """range(s) of valid values for p""" 
63          def fget(self): # pylint: disable=W0612,C0111 
64              return self._range 
65          return locals() 
66   
67 -    def _checkParam(self, value): 
68          """check parameter if allowed for paramter p 
69          @param value: the value to be checked  
70          @type value: float""" 
71          from fuzzy.utils import checkRange 
72          if not checkRange(value, self._range): 
73              from fuzzy.Exception import FuzzyException 
74              raise FuzzyException("Parameter value %s is not allowed" % str(value)) 
75   
76 -    def __repr__(self): 
77          """Return representation of instance. 
78                      
79             @return: representation of instance 
80             @rtype: string 
81             """ 
82          return "%s.%s(param=%s)" % (self.__class__.__module__, self.__class__.__name__, self._p) 
83   

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