Data commit

Task/Averages-Simple-moving-average/Python/averages-simple-moving-average-1.py

@@ -0,0 +1,17 @@
+from collections import deque
+
+def simplemovingaverage(period):
+    assert period == int(period) and period > 0, "Period must be an integer >0"
+
+    summ = n = 0.0
+    values = deque([0.0] * period)     # old value queue
+
+    def sma(x):
+        nonlocal summ, n
+
+        values.append(x)
+        summ += x - values.popleft()
+        n = min(n+1, period)
+        return summ / n
+
+    return sma

Task/Averages-Simple-moving-average/Python/averages-simple-moving-average-2.py

@@ -0,0 +1,21 @@
+from collections import deque
+
+class Simplemovingaverage():
+    def __init__(self, period):
+        assert period == int(period) and period > 0, "Period must be an integer >0"
+        self.period = period
+        self.stream = deque()
+
+    def __call__(self, n):
+        stream = self.stream
+        stream.append(n)    # appends on the right
+        streamlength = len(stream)
+        if streamlength > self.period:
+            stream.popleft()
+            streamlength -= 1
+        if streamlength == 0:
+            average = 0
+        else:
+            average = sum( stream ) / streamlength
+
+        return average

Task/Averages-Simple-moving-average/Python/averages-simple-moving-average-3.py

@@ -0,0 +1,15 @@
+if __name__ == '__main__':
+    for period in [3, 5]:
+        print ("\nSIMPLE MOVING AVERAGE (procedural): PERIOD =", period)
+        sma = simplemovingaverage(period)
+        for i in range(1,6):
+            print ("  Next number = %-2g, SMA = %g " % (i, sma(i)))
+        for i in range(5, 0, -1):
+            print ("  Next number = %-2g, SMA = %g " % (i, sma(i)))
+    for period in [3, 5]:
+        print ("\nSIMPLE MOVING AVERAGE (class based): PERIOD =", period)
+        sma = Simplemovingaverage(period)
+        for i in range(1,6):
+            print ("  Next number = %-2g, SMA = %g " % (i, sma(i)))
+        for i in range(5, 0, -1):
+            print ("  Next number = %-2g, SMA = %g " % (i, sma(i)))