Update app.py

app.py

@@ -32,7 +32,9 @@ def what_happened2(file_object, option_list):
     else:
         output1 = "You should upload a file."
     """
-    lines = file_object.read()
+    input_file = open(file_object.name, 'r')
+    lines = input_file.read()
+    input_file.close()
     output_file = open('output.txt', 'w')
     output_file.write(lines)
     output_file.close()