added rule for /k/ palatization

cltk/phonology/old_english/orthophonology.py

@@ -160,8 +160,18 @@
 
 oe = Orthophonology(sound_inventory, alphabet, diphthongs_ipa, digraphs_ipa)
 
+# intervocalic fricatives are voiced
 oe.add_rule(InnerPhonologicalRule(
-	lambda before, target, after: 
+	condition = lambda before, target, after: 
 		isinstance(before, Vowel) and target[Manner] == Manner.fricative and isinstance(after, Vowel),
-	lambda target: 
+	action = lambda target: 
 		oe.voice(target)))
+
+# /k/ is palatized in specific environments
+oe.add_rule(PhonologicalRule(
+	condition = lambda before, target, after:
+		target == k and
+		((isinstance(after, Vowel) and after[Backness] == Backness.front) or
+		(before is not None and before == i and 
+			(after is None or (isinstance(after, Vowel) and after[Backness] != Backness.back)))),
+	action = lambda _: tsh))

cltk/phonology/orthophonology.py

@@ -7,6 +7,10 @@
 class PhonologicalFeature(IntEnum):
 	pass
 
+class Consonantal(PhonologicalFeature):
+	neg = auto()
+	pos = auto()
+
 class Voiced(PhonologicalFeature):
 	neg = auto()
 	pos = auto()
@@ -116,10 +120,11 @@ def __init__(self, place, manner, voiced, ipa, geminate = Geminate.neg):
 		assert ipa is not None
 
 		AbstractPhoneme.__init__(self, {
-			Place    : place,
-			Manner   : manner,
-			Voiced   : voiced,
-			Geminate : geminate}, 
+			Consonantal : Consonantal.pos,
+			Place       : place,
+			Manner      : manner,
+			Voiced      : voiced,
+			Geminate    : geminate}, 
 			ipa)
 
 	def is_more_sonorous(self, other):
@@ -134,6 +139,7 @@ def __init__(self, height, backness, rounded, length, ipa):
 		assert ipa is not None
 
 		AbstractPhoneme.__init__(self, {
+			Consonantal : Consonantal.neg,
 			Height      : height, 
 			Backness    : backness, 
 			Roundedness : rounded, 
@@ -249,7 +255,9 @@ def transcribe_word(self, word):
 		return phonemes
 
 	def transcribe(self, text):
-		return [self.transcribe_word(word) for word in self.tokenize(text)]
+		phoneme_words = [self.transcribe_word(word) for word in self.tokenize(text)]
+		words = [''.join([phoneme.ipa for phoneme in word]) for word in phoneme_words]
+		return ' '.join(words)
 
 	def find_sound(self, phoneme) :
 		for sound in self.sound_inventory: