Data commit

Task/Entropy/Python/entropy-3.py

@@ -0,0 +1,19 @@
+def Entropy(text):
+    import math
+    log2=lambda x:math.log(x)/math.log(2)
+    exr={}
+    infoc=0
+    for each in text:
+        try:
+            exr[each]+=1
+        except:
+            exr[each]=1
+    textlen=len(text)
+    for k,v in exr.items():
+        freq  =  1.0*v/textlen
+        infoc+=freq*log2(freq)
+    infoc*=-1
+    return infoc
+
+while True:
+    print Entropy(raw_input('>>>'))