Fixed Bug aimacode#295 (aimacode#301)

Syntax error. Used the function len instead of count.

Author: vidursatija

learning.py

@@ -370,7 +370,7 @@ def plurality_value(examples):
 
     def count(attr, val, examples):
         "Count the number of examples that have attr = val."
-        return count(e[attr] == val for e in examples)
+        return len(e[attr] == val for e in examples) #count(e[attr] == val for e in examples)
 
     def all_same_class(examples):
         "Are all these examples in the same target class?"