Outline for today:
* Solutions to HW0
* Boolean, and, or, not, <, <=, >, >=, ==, <>, if, else, elif
* Maybe while
* Hw1 online and due in one week - rock/paper/scissors game
* In class activity - grading scale
* Getting around in IDLE/Python: help, dir, line number, debugger
* Start making your cheat sheet
  - for tests, can bring one piece of paper with anything on it (front and 
    back), and it can be printed off of a computer.
  - my suggestion: start keeping a document or page in your notebook with a 
    reference of the different python commands and rules, with short 
    examples.
  - this will also help you with the homeworks.
* Regular cycle of work: look at hw, not sure how to do it, do the 
  reading, look at the hw again, get some of it but not sure about another
  part, look at the reading again, send code/questions to Jeff or go to 
  CS lab, ...
  - do not waste your time, always be doing something productive.  if you are 
    just staring at your program for 5-10 minutes, you need to do something 
    else about it - look at the reading, try running the debugger, try 
    writing down on paper what each step of your program is doing, ...
* Note on the reading.
  - Think Python is a gentler introduction, and should be easier to read.
  - The Python tutorial is denser and faster.  You will read about things in
    there I have not talked about yet.  If I have not talked about it yet,
    you do not need it yet.  But you can remember that you read about it, and
    come back to it when we need it.  

Boolean
* possible values are True or False.
* x = True
* can combine True or False values with and, or, not (Boolean operators
* not True is False, not False is True
* True and False is False, True and True is True
* True or True is True, True or False is False
* practice with those.
* comparison operators are < <= > >= <> ==
  - each one evaluates to True or False
  - 10 < 9 is False
  - 10 <> 9 is True
    - <> and != are the same thing, you can use either.
  - 10 == 9 is False
  - difference between == and =.  = is for saving values into variables, 
    == is for comparing.
* practice with comparison operators

if/elif/else
* The whole point of Boolean stuff is to use them with if/elif/else
* the way the if works in general
* examples

In-class activity - grading scale.

Getting around in python/IDLE
* type help(x) to get help about the variable x.
* type help() to run the help program in the python shell.
* with a file open, line number is at bottom right corner.  error messages
  will tell you what line number to look at.
* debugger - can run a program one line at a time and see what the values
  of variables are.  
  - try it out on the homework file.
  - it will even go inside of functions you did not write.  normally we don't
    want that, so click "Step Out" to get back to your code.
* type dir() to see a list of variables that have been created.
* type dir(x) to see a list of things we can do to x (more on that later...)

HW1 file.
* explain it.
* using random module.  talk about that, and look at simple example using
  random module - flipping a coin.  
* functions - separating out different things we want to do, so we don't 
  always have to have the whole program get run.
  - basic way is to have def funcName(): then everything we want as part
    of the function is indented the same amount.

In-class activity - flip 10 coins, how many are heads?

In-class activity - while loops and are we there yet?