How to exit bash profile in terminal?

Hi.

I'm using MacBook Air 2014 and tried to install a Python library via command line in terminal. I've tried to research this, and performing commands such as "bash exit" seem not to work.

MacBook Air:

Mac OSX Sierra 10.12.3

This is what I see in Terminal when it opens.

Last login: Sat Aug 19 14:22:18 on console

-bash: touch: command not found

[Name of Computer]:~ [Username]$

Terminal settings:

On startup, open: "new window with profile, 'basic'"

Shells open with: 'Default login shell'

New windows open with: Default profile, default working directory

New tabs open with: same profile, same working directory

Any help would be much appreciated

- Matt