Add variable hist len (#7)

Author: PerlinWarp

src/pyomyo/Classifier.py

@@ -85,14 +85,12 @@ def classify(self, d):
 class MyoClassifier(Myo):
 	'''Adds higher-level pose classification and handling onto Myo.'''
 
-	HIST_LEN = 25
-
-	def __init__(self, cls, tty=None, mode=emg_mode.PREPROCESSED):
+	def __init__(self, cls, tty=None, mode=emg_mode.PREPROCESSED, hist_len=25):
 		Myo.__init__(self, tty, mode=mode)
 		# Add a classifier
 		self.cls = cls
-
-		self.history = deque([0] * MyoClassifier.HIST_LEN, MyoClassifier.HIST_LEN)
+		self.hist_len = hist_len
+		self.history = deque([0] * self.hist_len, self.hist_len)
 		self.history_cnt = Counter(self.history)
 		self.add_emg_handler(self.emg_handler)
 		self.last_pose = None
@@ -106,7 +104,7 @@ def emg_handler(self, emg, moving):
 		self.history.append(y)
 
 		r, n = self.history_cnt.most_common(1)[0]
-		if self.last_pose is None or (n > self.history_cnt[self.last_pose] + 5 and n > MyoClassifier.HIST_LEN / 2):
+		if self.last_pose is None or (n > self.history_cnt[self.last_pose] + 5 and n > self.hist_len / 2):
 			self.on_raw_pose(r)
 			self.last_pose = r