Interface Design

Question 1

mainloop

Answer 1

This tells the window to wait for the user to do something.

Question 2

Method

Answer 2

Similar to a function but with different syntax, used to request.

bob.fd(100)

.fd is an argument.

Question 3

for statement (for loop)

Answer 3

Like a function definition, it has a header ending with a colon, followed by an indention and body. The body contains any number of statements.

Question 4

loop

Answer 4

The flow of execution runs through the body and then loops back to the top.

Question 5

encapsulation

Answer 5

Wrapping a piece of code into a function, attaching a name to the code.

Question 6

Generalization

Answer 6

Adding a parameter to a function to make it more general.

Question 7

Keyword argument

Answer 7

Arguments that include parameter names as “keywords”

polygon(bob, n=7, length=70)

Question 8

Interface

Answer 8

A summary of how a function is used.

Question 9

Refactoring

Answer 9

Rearranging a program to improve interfaces and facilitate code re-use.

Question 10

Development Plan

Answer 10

A process for writing programs. One way is “encapsulation and generalization”:

1. Write a small program with no definitions.
2. Identify a coherent piece of it, encapsulate it in a function.
3. Generalize the function by adding parameters.
4. Refactor repeating or similar code into new general functions.

Question 11

Docstring

Answer 11

String at the beginning of a function explaining the interface. Use triple quotes “””

Question 12

Preconditions

Answer 12

Conditions that must be true before the function starts executing.

Question 13

Postconditions

Answer 13

Conditions that include the intended effect of the function.