[Tutor] class question
Tiger12506
keridee at jayco.net
Fri Jul 13 21:09:04 CEST 2007
> Your second way seems to make more sense. And instead of raising the
> error, why not just print it:
There is a very good reason for this and it's important that you understand
it to write good code. If you use a print statement, you break the benefit
of encapsulation.
If you were to use that class in a GUI application, for example, you would
never know if the account had become overdrawn. Only by using an exception
could you use that class effectively in both circumstances, and in the same
way!
a = BankAccount()
try:
a.withdraw(50)
except:
notify_error()
Where notify error depends on how you want to communicate that information
to the end-user. (messagebox, display, stdout, stderr, file, etc)
JS
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