Added comments, main() and fixed pep8 errors

Author: ankit167

search/binary_search.py

@@ -1,3 +1,9 @@
+#
+# Binary search works for a sorted array.
+# Note: The code logic is written for an array sorted in
+#       increasing order.
+# T(n): O(log n)
+#
 
 
 def binary_search(array, query):
@@ -13,14 +19,19 @@ def binary_search(array, query):
             hi = mid - 1
     return None
 
-array = [1,2,3,3,3,3,4,4,4,4,5,6]
-print(array)
-print("-----SEARCH-----")
-print("found: ", 5, " in index:" , binary_search(array, 5))
-print("-----SEARCH-----")
-print("found: ", 6, " in index:" , binary_search(array, 6))
-print("-----SEARCH-----")
-print("found: ", 7, " in index:" , binary_search(array, 7))
-print("-----SEARCH-----")
-print("found: ", -1, " in index:" , binary_search(array, -1))
-print("-----SEARCH-----")
+
+def main():
+    array = [1, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 6]
+    print(array)
+    print("-----SEARCH-----")
+    print("found: ", 5, " in index:", binary_search(array, 5))
+    print("-----SEARCH-----")
+    print("found: ", 6, " in index:", binary_search(array, 6))
+    print("-----SEARCH-----")
+    print("found: ", 7, " in index:", binary_search(array, 7))
+    print("-----SEARCH-----")
+    print("found: ", -1, " in index:", binary_search(array, -1))
+    print("-----SEARCH-----")
+
+if __name__ == "__main__":
+    main()