Update app.py

app.py

@@ -71,9 +71,9 @@ def search_pattern(fulltext, pattern, method):
         import time
         start = time.time()
         occurrence = 0
-        for i in range(0,len(string)-len(pattern)):
+        for i in range(0,len(fulltext)-len(pattern)):
           if string[i:i+len(pattern)] == pattern:
-            print("Found ", string[i:i+len(pattern)], ' locating at position ', i+1)
+            print("Found ", fulltext[i:i+len(pattern)], ' locating at position ', i+1)
             occurrence += 1
         
         end = time.time()