You can install HTTP-prompt just like a regular Python package using PIP command as shown.
$ pip install http-prompt
You will likely get some permission errors if you are trying to install HTTP-prompt on the system-wide Python. It isn’t advised, but if this is what you want to do, just use sudo command to gain root privileges as shown.
$ sudo pip install http-prompt
Alternatively, you can use the --user option to install the package into user home directory as follows:
$ pip install --user http-prompt
To upgrade HTTP Prompt, do:
$ pip install -U http-prompt