Python allows you to define exception handlers that catch and handle the runtime errors that your program detects.

Here is an example of an exception handler in Python:

try:
    cost = totalcost / days
    print "Cost per day:", cost
except ZeroDivisionError:
    print "Division by zero error detected: number of days is 0"

The following sections provide an overview of what syntax and runtime errors are, and then describe how to add an exception handler to your program.