1. Nate Brunelle Today: Style, Collections
CS1110
Nate Brunelle
Today: Style, Collections

2. Questions?

3. Last Time
Debugging
Slicing

4. Style You should write code to be read by humans Docstrings Names Pep8
Have information at beginning of functions to describe what it does
Names
A name should describe the meaning
Can be hard
Make sure there is one meaning per variable
Pep8
Other Python style guidelines
Talks about things that aren’t names or docstrings, but make code ugly

5. Collections Order doesn’t matter, No Repetition
Order Matters, Repetition ok
Examples:
String
List
Tuple
Range
Counting starts at 0
collection[index] gives a specific value in the collection
Order doesn’t matter, No Repetition
Examples:
Set
Dict

6. Ordered Collections Collection What it can hold Syntax to create
Mutable?
String
characters ‘’
immutable
Range
ints
range
Tuple
Anything
( , )
List
[ , ]
mutable

7. Methods that Mutate Lists
append(element)
remove(element)
pop(i)