Setting up a subdirectory for week 9 in-class work
cd into your cs21/class/ subdirectory and create a new directory named 'week09',
then cd into that directory:
$ cd cs21/class # cd into your cs21/class subdirectory
$ mkdir week09 # make a subdirectory named week09
$ cd week09 # cd into it
Now copy over all the files from my public/cs21/week09 directory into your
week09 directory (remember to add the dot as the destination of the cp command).
From your week09 directory:
$ cp ~newhall/public/cs21/week09/* .
Weekly In-class Examples
This week we are going to look at lists of lists and some operations on
- We are not going to do this in class, but try out this
star_nestedloops.py problem on your own. It requires a nested loop pattern. See if you can get this. I'll show you a solution next week.
- In listoflists.py is an example of creating and accessing
elements in a list of lits. Let's look at this together, answer the
questions about type, and we will run it and see what it is doing.
gradebook.py we will look at starting a much larger example
that creates a lists of lists by reading in values from a file, and then
contains a set of functions that access the list of lists in different
ways. We will implement some, but not all, of the functions in this file.
- Using the starting point file list_algs.py, we are going
to implement some operations on lists:
- First, we are going to add a function to find an element in a
list of integer values.
- Next, we are going to think about how many steps this algorithm
- Finally, we are going to think about a better way to implement this
function (an algoritm with fewer steps).