verb.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3
   4 """
   5 simple conjugation of regular dutch verbs
   6 http://www.dutchgrammar.com/en/?n=Verbs.01
   7 """
   8
   9 from optparse import OptionParser
  10
  11 class Verbum:
  12         """generic verb methods"""
  13         def __init__(self, werkwoord):
  14                 self.werkwoord = werkwoord
  15
  16         def extract_stam(self):
  17                 """extracts the stem of the verb. only takes 3 rules into account."""
  18                 # een stam eindigt nooit op twee dezelfe medeklinkers
  19                 if self.werkwoord[-3] == self.werkwoord[-4]:
  20                         self.stam = self.werkwoord[:-3]
  21
  22                 # de stam van een -iën werkwoord eindigt op `ie'
  23                 elif self.werkwoord[-4:] == "iën":
  24                         self.stam = self.werkwoord[:-3] + "e"
  25
  26                 # een stam eindigt nooit op v of z
  27                 elif self.werkwoord[-3] == "v":
  28                         self.stam = self.werkwoord[:-3] + "f"
  29                 elif self.werkwoord[-3] == "z":
  30                         self.stam = self.werkwoord[:-3] + "s"
  31
  32                 else:
  33                         self.stam = self.werkwoord[:-2]
  34
  35         def to_string(self):
  36                 """writes out the conjugation to stdout"""
  37                 # this would take a list of words as an argument.
  38                 # it would then write out `pronomen - word' list.
  39                 # the Verbum class would have the pronomen as attributes.
  40                 pass
  41
  42 class Presens(Verbum):
  43         """takes a verb and conjugates it in the present tense"""
  44         def schrijven(self):
  45                 """writes out the conjugated verb to stdout"""
  46                 pronomen_singularis = ["ik", "jij/je", "u", "hij/zij/ze"]
  47                 pronomen_pluralis = ["wij/we", "jullie", "zij/ze"]
  48
  49                 for pronom in pronomen_singularis:
  50                         if pronom == "ik":
  51                                 print "%s\t%s()" % (pronom, self.stam)
  52                         else:
  53                                 print "%s\t%s(%s)" % (pronom, self.stam, "t")
  54
  55                 for pronom in pronomen_pluralis:
  56                         # bug re rule #1, try `pakken'
  57                         print "%s\t%s(%s)" % (pronom, self.stam, "en")
  58
  59 if __name__ == "__main__":
  60         gui = OptionParser()
  61         gui.add_option("-w", "--werkwoord", action="store", dest="werkwoord")
  62         (options, args) = gui.parse_args()
  63         verbum = Presens(options.werkwoord)
  64
  65         # simple sanity checks, the word `t' is not a verb :)
  66         try:
  67                 verbum.werkwoord[-4]
  68         except IndexError:
  69                 gui.error("option -w, the verb needs more letters")
  70         if verbum.werkwoord[-4:] != "iën":
  71                 if verbum.werkwoord[-2:] != "en":
  72                         gui.error("option -w: the ending of the verb must be \"-en\"")
  73
  74         verbum.extract_stam()
  75         verbum.schrijven()
  76
  77 # vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4