The terminal on my Mac does not work anymore after installing Python & Sublime Text
Your PATH environment variable seems to have been changed somewhere.

Type the following command at your Terminal prompt:

echo 'PATH=/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:~/bin:$PATH' &gt;&gt; ~/.bash_profile

Exit terminal and the shell by typing exit and closing the Terminal app. Relaunch.

Everything should be working now.