Flask Error Template not found

Flask Error Template not found

While developing one flask project, this was my initial hitting with this framework, I got a number of errors. 

My directory structure was 

--> hello.py

-->template-->index.html

But i got the following error, I even tried with the directory structure 

--> hello.py
-->index.html

jinja2.exceptions.TemplateNotFound

jinja2.exceptions.TemplateNotFound: xindex.html

Traceback (most recent call last)

• File "C:\Program Files\Python38\lib\site-packages\flask\app.py", line 2463, in __call__

  return self.wsgi_app(environ, start_response)

• File "C:\Program Files\Python38\lib\site-packages\flask\app.py", line 2449, in wsgi_app

  response = self.handle_exception(e)

But both no change in the error. After a short study of the framework, it got clear that directory structure should be 

--> hello.py

-->templates/index.html

Now things start working prefrectly.