Made msd and feature-level checking optional, added docstrings

conversion_utils/jos_msds_and_properties.py

@@ -230,7 +230,10 @@ class Msd:
         return isinstance(obj, Msd) and self.code == obj.code and self.language == obj.language
 
 
-class ConverterException(Exception):
+class CustomException(Exception):
+    pass
+
+class MsdException(CustomException):
     pass
 
 class Converter:
@@ -253,17 +256,46 @@ class Converter:
             except:
                 exit('Could not parse specifications xml file provided.')
 
-    def msd_to_properties(self, msd, language, lemma=None):
+    def is_valid_msd(self, msd):
-        """Convert Msd to Properties (possibly in the other language).
+        """Verify if the Msd code is in the standard JOS set."""
+        return msd.code in self.specifications.codes_map[msd.language]
+
+    def check_valid_msd(self, msd, require_valid_flag):
+        """If the Msd code is not valid, raise an exception or give a warning."""
+        if (not self.is_valid_msd(msd)):
+            message = 'The msd {} is unknown'.format(msd.code)
+            if (require_valid_flag):
+                raise MsdException(message)
+            else:
+                print('[WARN] ' + message)
+
+    def msd_to_properties(self, msd, language, lemma=None, require_valid_flag=False, warn_level_flag=False):
+        """Convert Msd to Properties.
+
+        The language of the generated Properties is specified and can differ from the Msd language.
+
+        If require_valid_flag is True, a MsdException is raised if the MSD is not in the standard
+        JOS set. Otherwise only a warning is given.
+
+        If you care about accurate level information (i.e., which properties are lexeme-level and
+        which are form-level), note that some features depends on the particular lemma. For such
+        features, if lemma is not provided and warn_level_flag is True, a warning will be given.
+
+        If a MSD has dashes in place of letters for certain features, they are skipped, so that
+        these features are not included in the generated Properties object.
+
+        Parameters:
+        msd(Msd): the JOS MSD to convert
+        language(str): the language for the Properties object to be generated: "en" (English) or "sl" (Slovene)
+        lemma(str): the lemma of the word form with the MSD
+        require_valid_flag(boolean): whether to raise a MsdException or only warn if a non-standard MSD is provided
+        warn_level_flag(boolean): whether to warn if cannot be sure of level of a property
+
+        Returns:
+        Properties: the result of the conversion of the Msd in the language requested
 
-        The level (lexeme vs form) of certain reflexive msd features
-        depends on the lemma, so set the lemma if you need accurate
-        level information.
         """
-
+        self.check_valid_msd(msd, require_valid_flag)
-        if (msd.code not in self.specifications.codes_map[msd.language]):
-            raise ConverterException('The msd {} is unknown'.format(msd.code))
-
         category_char = msd.code[0].lower()
         value_chars = msd.code[1:]
         category = self.specifications.find_category_by_code(category_char, msd.language)
@@ -277,8 +309,8 @@ class Converter:
                 value = feature.find_value_by_char(value_char, msd.language)
                 feature_name = feature.names.get(language)
                 feature_value = value.names.get(language)
-                if (lemma is None and (category_name, index) in [(le[0], le[1]) for le in LEVEL_EXCEPTIONS]):
+                if (warn_level_flag and lemma is None and (category_name, index) in [(le[0], le[1]) for le in LEVEL_EXCEPTIONS]):
-                    print('[WARN] The level of feature (category={category}, position={position}) may be incorrect, as it is lemma-specific and no lemma has been specified.'
+                    print('[WARN] The level (lexeme vs form) of feature (category={category}, position={position}) may be incorrect, as it is lemma-specific and no lemma has been specified.'
                           .format(category=category_name, position=index))
                 level_exception_flag = (category_name, feature.position, lemma) in LEVEL_EXCEPTIONS
                 lexeme_level_flag = feature.lexeme_level_flag if not level_exception_flag else not feature.lexeme_level_flag
@@ -289,8 +321,21 @@ class Converter:
                     form_feature_map[feature_name] = feature_value
         return Properties(category_name, lexeme_feature_map, form_feature_map, language)
 
-    def properties_to_msd(self, properties, language):
+    def properties_to_msd(self, properties, language, require_valid_flag=False):
-        """Convert Properties to msd (possibly in the other language)."""
+        """Convert Properties to Msd.
+
+        The language of the generated Msd is specified and can differ from the Properties language.
+
+        If require_valid_flag is True, a MsdException is raised if the generated MSD is not in
+        the standard JOS set. Otherwise only a warning is given.
+
+        Any skipped positions among the Properties are represented as dashes in the MSD.
+
+        Parameters:
+        properties(Properties): the properties to convert
+        language(str): the language for the Msd object to be returned: "en" (English) or "sl" (Slovene)
+        require_valid_flag(boolean): whether to raise a MsdException or only warn if a non-standard MSD is generated
+        """
         category = self.specifications.find_category_by_name(properties.category, properties.language)
         category_char = category.codes.get(language).upper()
         feature_map = properties.lexeme_feature_map.copy()
@@ -308,7 +353,9 @@ class Converter:
                 msd_code += '-'
                 i += 1
             msd_code += position_map[position]
-        return Msd(msd_code, language)
+        msd = Msd(msd_code, language)
+        self.check_valid_msd(msd, require_valid_flag)
+        return msd
 
     def translate_msd(self, msd, language):
         return self.properties_to_msd(self.msd_to_properties(msd, language), language)

conversion_utils/tests/test_jos_msd_to_properties.py

@@ -1,6 +1,6 @@
 import unittest
 
-from conversion_utils.jos_msds_and_properties import Converter, Msd
+from conversion_utils.jos_msds_and_properties import Converter, Msd, MsdException
 
 class JosMsdToPropertiesTestCase(unittest.TestCase):
 
@@ -55,3 +55,25 @@ class JosMsdToPropertiesTestCase(unittest.TestCase):
         self.assertEqual(properties.category, 'punctuation')
         self.assertEqual(properties.lexeme_feature_map, {})
         self.assertEqual(properties.form_feature_map, {})
+
+    def test_good_msd_with_require_valid(self):
+        properties = self.converter.msd_to_properties(Msd('Ncfpd', 'en'), 'en', require_valid_flag=True)
+        self.assertEqual(properties.language, 'en')
+        self.assertEqual(properties.category, 'noun')
+        self.assertEqual(properties.lexeme_feature_map, {'type':'common', 'gender':'feminine'})
+        self.assertEqual(properties.form_feature_map, {'number':'plural', 'case':'dative'})
+
+    def test_bad_msd(self):
+        properties = self.converter.msd_to_properties(Msd('N---d', 'en'), 'en')
+        self.assertEqual(properties.language, 'en')
+        self.assertEqual(properties.category, 'noun')
+        self.assertEqual(properties.lexeme_feature_map, {})
+        self.assertEqual(properties.form_feature_map, {'case':'dative'})
+
+    def test_bad_msd_with_require_valid(self):
+        try:
+            self.converter.msd_to_properties(Msd('N---d', 'en'), 'en', require_valid_flag=True)
+            fails = False
+        except MsdException:
+            fails = True
+        self.assertEqual(fails, True)

conversion_utils/tests/test_jos_properties_to_msd.py

@@ -1,6 +1,6 @@
 import unittest
 
-from conversion_utils.jos_msds_and_properties import Converter, Properties
+from conversion_utils.jos_msds_and_properties import Converter, Properties, MsdException
 
 class JosPropertiesToMsdTestCase(unittest.TestCase):
 
@@ -41,3 +41,21 @@ class JosPropertiesToMsdTestCase(unittest.TestCase):
         msd = self.converter.properties_to_msd(Properties('punctuation', {}, {}, 'en'), 'sl')
         self.assertEqual(msd.language, 'sl')
         self.assertEqual(msd.code, 'U')
+
+    def test_good_msd_with_require_valid(self):
+        msd = self.converter.properties_to_msd(Properties('noun', {'type':'common', 'gender':'feminine'}, {'number':'dual', 'case':'nominative'}, 'en'), 'en', require_valid_flag=True)
+        self.assertEqual(msd.language, 'en')
+        self.assertEqual(msd.code, 'Ncfdn')
+
+    def test_bad_msd(self):
+        msd = self.converter.properties_to_msd(Properties('noun', {'type':'common'}, {'number':'dual'}, 'en'), 'en')
+        self.assertEqual(msd.language, 'en')
+        self.assertEqual(msd.code, 'Nc-d')
+
+    def test_bad_msd_with_require_valid(self):
+        try:
+            self.converter.properties_to_msd(Properties('noun', {'type':'common'}, {'number':'dual'}, 'en'), 'en', require_valid_flag=True)
+            fails = False
+        except MsdException:
+            fails = True
+        self.assertEqual(fails, True)