From 85236e57acb3c2f2533c00ea06b3afb6cffb0649 Mon Sep 17 00:00:00 2001
From: Chris Ball <cjb@laptop.org>
Date: Sun, 09 Mar 2008 20:04:31 +0000
Subject: Initial import

---
(limited to 'LanguageModel.py')

diff --git a/LanguageModel.py b/LanguageModel.py
new file mode 100644
index 0000000..abe63bd
--- /dev/null
+++ b/LanguageModel.py
@@ -0,0 +1,66 @@
+# Copyright 2008 Chris Ball.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+from __future__ import with_statement
+import time
+
+class LanguageModel():
+    def SetLanguages(self, lang1, lang2):
+        """Take a language pair, prepare the language model."""
+        self.lang1_lang2 = {}
+        self.lang2_lang1 = {}
+        
+        # Since we only have English->lang mappings, ignore lang1.
+        filename = "lang/" + lang2 + ".txt"
+        with open(filename, 'r') as f:
+            for line in f.readlines():
+                line = line.rstrip()
+                if line.startswith("#"):
+                    continue
+
+                words_list = line.split('\t')
+                if words_list[0] in self.lang1_lang2:
+                    self.lang1_lang2 [ words_list[0].lower() ] += ", " + words_list[-1].lower()
+                else:
+                    self.lang1_lang2 [ words_list[0].lower() ] = words_list[-1].lower()
+                    
+                if words_list[-1] in self.lang2_lang1:
+                    self.lang2_lang1 [ words_list[-1].lower() ] += ", " + words_list[0].lower()
+                else:
+                    self.lang2_lang1 [ words_list[-1].lower() ]  = words_list[0].lower()
+
+    def GetSuggestions(self, string):
+        """Take a string, provide two lists of possible each lang completions."""
+        list_1 = [k for k in self.lang1_lang2.iterkeys() if k.startswith(string)]
+        list_2 = [k for k in self.lang2_lang1.iterkeys() if (k.startswith(string) or k.rfind(" " + string) > -1)]
+        return [sorted(list_1), sorted(list_2)]
+
+    def GetTranslations(self, lang, string):
+        """Take a word and lang (0 for first, 1 for second), provide a list 
+        (empty allowed) of translations."""
+        if lang == 0: # lang1 is source
+            trans_list = [self.lang1_lang2[string]]
+        elif lang == 1: # lang2 is source
+            trans_list = [self.lang2_lang1[string]]
+        else:
+            raise AssertionError("lang must be 0 or 1")
+        return trans_list
+
+if __name__ == "__main__":
+    a = LanguageModel()
+    a.SetLanguages("English", "Spanish")
+    print a.GetSuggestions("tru")
+    print a.GetTranslations(0, "dog")
--
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