filters/helpers.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3 #
   4 # Copyright 2004-2006 Zuza Software Foundation
   5 #
   6 # This file is part of translate.
   7 #
   8 # translate is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # translate is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with translate; if not, write to the Free Software
  20 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21
  22 """a set of helper functions for filters..."""
  23
  24 import operator
  25
  26 def countmatch(str1, str2, countstr):
  27     """checks whether countstr occurs the same number of times in str1 and str2"""
  28     return str1.count(countstr) == str2.count(countstr)
  29
  30 def funcmatch(str1, str2, func, *args):
  31     """returns whether the result of func is the same for str1 and str2"""
  32     return func(str1, *args) == func(str2, *args)
  33
  34 def countsmatch(str1, str2, countlist):
  35     """checks whether each element in countlist occurs the same number of times in str1 and str2"""
  36     return reduce(operator.and_, [countmatch(str1, str2, countstr) for countstr in countlist], True)
  37
  38 def funcsmatch(str1, str2, funclist):
  39     """checks whether the results of each func in funclist match for str1 and str2"""
  40     return reduce(operator.and_, [funcmatch(str1, str2, funcstr) for funcstr in funclist], True)
  41
  42 def filtercount(str1, func):
  43     """returns the number of characters in str1 that pass func"""
  44     return len(filter(func, str1))
  45
  46 def filtertestmethod(testmethod, strfilter):
  47     """returns a version of the testmethod that operates on filtered strings using strfilter"""
  48     def filteredmethod(str1, str2):
  49         return testmethod(strfilter(str1), strfilter(str2))
  50     filteredmethod.__doc__ = testmethod.__doc__
  51     filteredmethod.name = getattr(testmethod, 'name', testmethod.__name__)
  52     return filteredmethod
  53
  54 def multifilter(str1, strfilters, *args):
  55     """passes str1 through a list of filters"""
  56     for strfilter in strfilters:
  57         str1 = strfilter(str1, *args)
  58     return str1
  59
  60 def multifiltertestmethod(testmethod, strfilters):
  61     """returns a version of the testmethod that operates on filtered strings using strfilter"""
  62     def filteredmethod(str1, str2):
  63         return testmethod(multifilter(str1, strfilters), multifilter(str2, strfilters))
  64     filteredmethod.__doc__ = testmethod.__doc__
  65     filteredmethod.name = getattr(testmethod, 'name', testmethod.__name__)
  66     return filteredmethod
  67