Move 'iterable' module

smnp/module/note/__init__.py

@@ -1,4 +1,4 @@
-from smnp.module.note.function import tuplet, transpose, semitones, pause, octave, duration
+from smnp.module.note.function import tuplet, transpose, semitones, pause, octave, duration, interval
 
-functions = [ pause.function, semitones.function, transpose.function, tuplet.function ]
+functions = [ pause.function, semitones.function, interval.function, transpose.function, tuplet.function ]
 methods = [ duration.function, octave.function ]

smnp/module/note/function/interval.py

@@ -0,0 +1,25 @@
+from smnp.library.model import Function, CombinedFunction
+from smnp.library.signature import varargSignature, ofTypes, listOf
+from smnp.note.interval import intervalToString
+from smnp.note.model import Note
+from smnp.type.model import Type
+
+_signature1 = varargSignature(ofTypes(Type.NOTE, Type.INTEGER))
+def _function1(env, vararg):
+    withoutPauses = [note.value for note in vararg if note.type == Type.NOTE]
+    if len(withoutPauses) < 2:
+        return Type.list([])
+    semitones = [Note.checkInterval(withoutPauses[i-1], withoutPauses[i]) for i in range(1, len(withoutPauses))]
+    return Type.list([Type.string(intervalToString(s)) for s in semitones]).decompose()
+
+
+_signature2 = varargSignature(listOf(Type.NOTE, Type.INTEGER))
+def _function2(env, vararg):
+    return Type.list([_function1(env, arg.value) for arg in vararg]).decompose()
+
+
+function = CombinedFunction(
+    'interval',
+    Function(_signature1, _function1),
+    Function(_signature2, _function2)
+)