CSE 1010 Lecture 21: BANK ACCOUNTS WITH ALL-NEW EXCEPTIONS

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27 Apr 2018

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WEEK 13 - LECTURE 21 - BANK ACCOUNTS WITH ALL-NEW EXCEPTIONS

BANK ACCOUNTS

● Recall the bank account class:

○ The Python convention is to name instance variables with underscores.

○ It hides them, and it means "Only methods in this class should use these

variables."

● New deposit function different from the previous one

○ Now we return the new balance from deposit.

● Withdraw function

○ Return the new balance from withdraw.

Exceptions

● But what if the account doesn't have enough money?

○ A function should return a correct value or it should not return at all.

● New withdraw function

○ This function is guaranteed to return the new balance.

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