Histogram class and test added

src/Histogram.py

+class Histogram:
+
+    def __init__(self, bins, min, max):
+        self.bins = [0] * bins
+        self.min = min
+        self.max = max
+        
+    def add(self, number):
+        bin_index = self.get_bin_index(number)
+        self.bins[bin_index] += 1
+        
+    def remove(self, number):
+        bin_index = self.get_bin_index(number)
+        self.bins[bin_index] -= 1
+        
+    def get_bin_index(self, number):
+        return (number - self.min) / ((self.max - self.min) / len(self.bins))
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src/histogram_test.py

+from Histogram import Histogram
+
+his = Histogram(10, 10, 110)
+his.add(10)
+his.add(19)
+his.add(20)
+his.add(29)
+his.add(30)
+his.add(39)
+his.add(40)
+his.add(49)
+his.add(50)
+his.add(59)
+his.add(60)
+his.add(69)
+his.add(70)
+his.add(79)
+his.add(80)
+his.add(89)
+his.add(90)
+his.add(99)
+his.add(100)
+his.add(109)
+
+print his.bins
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