Merge pull request #4 from lnhubbell/patch-1

Update session04.rst

Author: cewing

source/session04.rst

@@ -1168,17 +1168,22 @@ Text and files and dicts, and...
 Exceptions
 -----------
 
-Improving ``raw_input``
-
-* The ``raw_input()``  function can generate two exceptions: ``EOFError``  or
-  ``KeyboardInterrupt``  on end-of-file(EOF) or canceled input.
-
-* Create a wrapper function, perhaps ``safe_input()``  that returns ``None``
-  rather rather than raising these exceptions, when the user enters ``^C``  for
-  Keyboard Interrupt, or ``^D`` (``^Z``  on Windows) for End Of File.
-
-* Use this wrapper to get input from users in your mailroom program and use
-  exceptions (and EAFP) to handle malformed numeric input
+* Improving raw_input :
+   - Create a new file: safe_input.py -- add it to your repo, and submit a pull request. Make sure to make frequent commits with good commit messages.
+
+* The raw_input() function can generate two exceptions:
+   - EOFError or end-of-file (EOF)
+   - KeyboardInterrupt  or canceled input.
+   - Create a wrapper function, perhaps safe_input() that returns 'None' rather than raising these exceptions.
+* Note:
+   - ^C causes a KeyboardInterrupt Error
+   - ^D (^Z on Windows) causes an End Of File Error.
+   - ^ is the Control character
+ 
+* The next step should be done in your mailroom.py file: 
+
+   - Update your mailroom.py program to use exceptions (and BAFP) to handle malformed numeric input (and other malformed input)
+   - Make sure to have your commit comment reflect that you've added this feature
 
 
 Paths and File Processing