Added Binary Search and Modified Linear Search

BinarySeach.py

@@ -0,0 +1,29 @@
+def binarySearch(alist, item):
+    
+    first = 0
+    last = len(alist)-1
+    found = False
+    
+    while first<=last and not found:
+        
+        midpoint = (first + last)//2
+        if alist[midpoint] == item:
+             found = True
+             print("Found")
+        else:
+            
+            if item < alist[midpoint]:
+                
+                last = midpoint-1
+            else:
+                first = midpoint+1
+        if found == False:
+            
+            print("Not found")
+    return found
+print("Enter numbers seprated by space")
+s = input()
+numbers = list(map(int, s.split()))
+trgt =int( input('enter a single number to be found in the list '))
+binarySearch(numbers, trgt)
+