No folder for virtual environment

There is no folder for virtual environment, and without one I can’t run the command python -m http.server.

Hello @KanishkVishwakarma

I suppose you are following one of the web development for ROS tutorials.
In the first chapter there are instructions in the notebook to create such environment for python 3

If you prefer to use python 2, you just install the http server and run it like below:
python -m SimpleHTTPServer 7800