The Python Apprentice

Exceptions and control flow

Since exceptions are a means of control flow, they can be clumsy to demonstrate at the REPL, so in this chapter we'll be using a Python module to contain our code. Let's start with a very simple module we can use for exploring these important concepts and behaviors. Place the this code in a module called exceptional.py:

"""A module for demonstrating exceptions."""def convert(s):    """Convert to an integer."""    x = int(s)    return x

Import the convert() function from this module into the Python REPL:

$ python3Python 3.5.1 (v3.5.1:37a07cee5969, Dec  5 2015, 21:12:44)[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwinType "help", "copyright", "credits" or "license" for more information.>>> from exceptional import convert ...