Add file (codes.el): Add codes.el to contain codes to execute and/or modify corresponding packages. The initial code to be seen is for IPython.
Update file (.emacs): Add new function (ipython-mode()) and use it as a hook for (python-mode). This will override default python interpreter to use ipython.
Update file (.emacs): Modify keyboard shortcut (<f5>) to excecute "run-python" (also bound by C-c C-c or ctrl+c ctrl+c) when editing a .py file (python-mode).
Update file (.emacs): Modify keyboard shortcut functionality (<f5>) from "eshell" to "shell".