Download Python - Mrs Hasseld

Tuesday, November 8th
 Warm Ups:
 Please find your new seat!
 Please NOTICE the personal technology sign is RED.
 NOTE: if you did NOT present your Finch project yet,
we can discuss in the last ten minutes
 Today … we CONTINUE Python!
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Programming
 Computer Screens OFF
 Fold paper into 1/3
 Left side: “Programming Skills I’ve Learned”
 Middle: “Programs/Projects”
 Right Side: “Programming skills I still WANT to Learn”
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Programming Skills I’ve
learned
Make a list!!!
3
Programming Skills I
still WANT to learn
Make a list!
4
Let’s fill in our
programs/projects
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Here’s what we are about
today …
 Identify programming skills you’ve learned, skills you
want to learn and see the progression between the
programming languages we use in class.
 Define integers, operators, values and expressions and
practice these mathematical tools using Python.
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Why Python?
 Python is a high level language
 It still “hides” much of the technical computer language
 You can use “English” to program
 Dynamic programming language
 Fast and incremental development
 Self checks at run time
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Why Python
 Expressive Power
 How easy it is to express an idea
 How concisely you can express your idea
 Readability
 Indentation
 Use of words instead of symbols
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Python
Chapter 2
Syntax error programming language
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Some Simple Math …
 Your interaction with Python begins with some simple
math …
 Let’s set the stage first …
 You take notes …
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Arithmetic Operations & Hierarchy of
Operations
Operator
**
operation
Basic expression
Exponentiation
A ** B
*
Multiplication
A*B
/
Division
A/B
+
Addition
A+B
-
Subtraction
A-B
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Examples
Evaluate the following expressions:
x = 3 * 6 - 12 / 3
x = 4 ** (8 / 4)
y = 12 + 6 / (3 * (10 - 9))
z = 5 + 4 ** 2
m=6/3+3
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Integers and Floating Point Numbers
Integers = whole numbers 4, 0, 99
Floating point numbers = numbers with decimal point 4.0, 0.0, 23.45
Expressions are made up of values and operators
operator
value
Scratch operators
were the green blocks
value
2+2
expression
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Python …
 Python has an “interactive shell” where you can
program a line of code and quickly see whether or not it
works
 It’s an icon on your desktop that looks like this: (turn on
screen and OPEN it!)
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Let’s test it out …
 With IDLE open, enter
2+2
 What happens?
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What’s the computer
program (Python) really
doing?
If you wanted to do the same thing in
Scratch, how would you do that?
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In Summary
 Identify programming skills you’ve learned, skills you
want to learn and see the progression between the
programming languages we use in class.
 Define integers, operators, values and expressions and
practice these mathematical tools using Python.
 TOMORROW … You get to PLAY on your own, with a
great tutorial.
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Thursday, November 10th
 Warm Up: Please retrieve your questions from
yesterday and please get out a pen or pencil
 Also, please determine exactly where you are in the
Python “book” (chapter 3? Chapter 4???)
 Today:
 Review Python Concepts
 Continue work
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Questions from 11/9
 1.What’s the difference between an Integer and a
floating number?
2.What’s the difference between an Operator and a
value?
3.Explain what an Expression is and what it means to
evaluate an expression
4.What is Python?
5.How will your knowledge of scratch and finch help
you with python?
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Python isn’t limited to just numbers.
It’s more than just a fancy calculator.
When a computer solves the expression 10+5 to get the value 15
It has evaluated the expression
10+5 and 10+3+2 both evaluate to 15
5 + is NOT an expression
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Creating Variables

Variable- Location where memory can be
stored on the computer. Value can change as
the program is running.
 To save the values that our expressions
evaluate to use them later




Used to hold temporary information
Used to control the type of data in calculations
Can store only one piece of data at any time
Data is processed faster
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Statements
 When you press Enter
 And there is no “error message”
 The instruction has been executed successfully
 The instruction (assignment statement) creates the
variable to be stored
 Statement = not single value
 Expression = single value
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Create a variable and
evaluate it
 >>> var = 12
create variable
 >>> var
state variable
 12
value stored
 >>> var+6
variable used
 18
variable remembered and
used
 >>>
12+6
is just like var + 6
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Using multiple variables
 >>> fish = 100
 >>> bear = 140
 >>> fish + bear
 240
 >>>
Fish variable has 100 inside it
What does bear represent?
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Overwriting a variable
 Replacing the value in a variable
with a new value
 The old value is permanently
forgotten
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Questions to complete 11/10
 How do you create a variable in Python? How does that
compare to scratch?
 How do you store a variable in Python?
 How do you overwrite a variable in Python?
 What does it mean when Python “evaluates an expression?”
 What’s a string? How do you indicate something is a string?
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Python
Chapter 3
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Friday, November 11th
 Warm Up: Take a “Guess” handout from the middle
table
 Read it, analyze what the program is doing
 Feel free to write all over the paper
 Let’s review it together … again feel free to write on the
code
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Strings
 Little chunks of text
 To create a string put information between two single
quotes

‘
‘
>>> speak = 'hello'
>>> speak
'hello'
>>>
Strings can have almost any keyboard
character
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String Concatenation
You can add one string to another
>>> 'Hello ' + 'World!'
'Hello World!'
>>>
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Flow of execution
creating a set of instructions
That is the basic definition of programming
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Comments
# will allow you to add a comment to explain
something that will not interfere with the flow of execution
Function
Mini programs and some are already programmed into
Python code
Print () Print function will display text on screen between ()
Input () Waits for input for the user to enter
Function calls will evaluate a single value --- Return Value
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Computers will only do what you tell them
Variable names should be relevant to what they are for
Variable names are case-sensitive
World
WorlD
world
These are all different variables
Capitalize if you use more than one word in variable and no spaces
VariableNameMultipleWords
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Guess Program – flow chart
 How do you flow chart “while”
 How do you flow chart “if”
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Monday, November 14th
 Warm Up: Please get out your completed flow chart for
the guess program.
 Today: Review chapter four, questions, chapter 5 – joke
program
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Python
Chapter 4
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Import, Module, Function
 Import is a code that tells Python to “bring in” a module
 Function: prewritten code or mini program that you can
use in Python, available in your program
 It’s like boxed spaghetti noodles instead of making them
from scratch
 Examples: print ( ), input ( ),
 Module: prewritten code or mini program used in
Python, you must IMPORT into your program
 It’s like a frozen dinner with spaghetti, noodles and bread
 Example: Random
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Random Function
number = random.randint(1, 20)
This is a function INSIDE the random
module. This function will return a
random integer between two numbers
Number is a variable that is storing the random number
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Arguments
Values that are passed to a function when the function is called
Arguments tell the function how to behave
Arguments are separated by commas
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Let’s practice
 Open Python’s IDLE (remember, that’s where you can
practice code)
 In chapter four, turn to pages 6 & 7
 Play with the random.randint function!!!
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Loops
Loops are parts of code that will happen (executed) over and over
Blocks
Blocks begin where the line is indented four spaces
Blocks end where the line indentation is the same as before the block
You must have blocks to create loops
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Concatenation Review
Another example of concatenating strings together
print('Well, ' + name + ' I am thinking of a number between 1 and 100.')
string
+ string + string
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Comparison Operators
<
>
<=
>=
==
!=
Less than
Greater than
Less than or equal to
Greater than or equal to
Equal to
Not equal to
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Boolean Data Type
Two values TRUE or FALSE
Case sensitive
Not strings
Also called bools
Conditions
Expression that combines two values with a comparison operator
Always evaluates a Boolean value
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Experiment … pages
11, 12
Booleans, Comparison Operators, Conditions
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Int( ) function
Converts strings to integers with this function
Break statements
Tells the program to jump out of the while-block
Str( ) function
Converts an integer to a string with this function
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Now work on Chapter 4
OR if you have
completed everything,
move on to Chapter 5
There are 6 definitions on my
website that you need to
complete for chapter four
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Tuesday, November 15th
 Warm Up: Create a flow chart for the joke program
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Chapter Five
 Writing Jokes!
 Complete chapter 5 by writing and running the program
 Then, complete all the tasks in chapter 5
 Then, create your own joke program
 - include at least three jokes
- include user input
- show Mrs. H when done both the flow chart and your
own joke program
Due 11/15 end of class
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Wednesday, November 16th
 Warm Up: Today, you are going to create your own
MadLib!
 Create madlib using Python (all it takes is variables,
print and input functions and concatenation)
Use these Functions: input & print
Create at least 4 Variables
Use Concatenation of strings & variables
Include the date and time at the beginning of the code
import datetime
Due at end of class on 11/16
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Thursday, November 17th
 Warm Up: When your python program doesn’t work,
how do you fix it?
 Today




Mad Lib
Finish reviewing joke programs and flow charts
Review Scratch game
Chapter 6 Python
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Monday, April 11th
 Warm Up: Please take the chapter six handout from the
middle table. Read the code. Write on the document
what each line of code does. If you don’t know, circle it.
 Today:
 Schedule discussion
 Brief Overview of chapter six
 Time to work on chapter six
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Tuesday, November 29th
 Warm Up: It’s time to get back into Python! In your
journal, define: Loops, blocks, Boolean Data Type,
Comparison Operator (if you can’t remember, you can
always look it up in the “book”!)
 Today:
 Chapter 6 more to learn!
 Get a copy of the Dragon program from the middle
table
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Chapter 6
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Def () function
Def function is creating, or
defining, a new function that
we can call later in our
program. This way you don’t
have to recreate the same
code multiple times.
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Functions
 Define the function BEFORE you call it in the program
 Let’s look at the chooseCave function.
 On what lines is it defined?
 On what line is it executed or called?
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Return Value
 ONLY inside Def blocks
 Breaks us out of the function (like Break will break out
of a while loop)
 Look at line 17
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Or Else
 Else – always comes after the IF block
 Explains what happens IF the condition is NOT met
 Colon : must always accompany the else key word
 Look at line 32
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Truth Tables
and
or
not
A
True
True
False
False
and
and
and
and
and
B
True
False
True
False
is
is
is
is
is
Entire statement
True
False
False
False
A
True
True
False
False
or
or
or
or
or
B
True
False
True
False
is
is
is
is
is
Entire statement
True
True
True
False
not A is
not True
not False
Entire statement
is
False
is
True
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Boolean – Truth tables
 Look at line 13
 It’s an expression with a boolean operator

“AND”
 Which means ….
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Boolean – Truth tables
 While
 The cave is NOT 1
 And (since AND is used, both of these conditions must be true for the
boolean to be true)
 The cave is NOT 2
 (line 14) Ask the user which cave they want
 (line 15) The user’s input is the variable “cave”
 What happens if the user enters “two” or “pig” or “17”?
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Remember I said we would come back to this …
Global Scope Variables
read outside and inside functions, but can only be
modified outside of all functions.
Where can we find one in Dragon?
Local Scope Variables
read or modified inside that function.
“forgotten” after the function is executed
Where can we find one in Dragon?
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But ….
 What do I do if I need to take a global variable and use
it inside a function?
 I have to “give” or “pass” that global variable to the
function
 That’s called a parameter
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Parameters
 Line 19
 Def checkCave (chosenCave) :
 Variable names inside parenthesis are called
parameters
 Parameters are local variables that are defined when
we call a function
 chosenCave is a new, local, temporary variable
 It’s the variable that indicates which cave the user
selected
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This is where the game actually begins!!!!
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It begins …
Set variable playAgain to yes
Make sure playAgain is yes
Run Intro function (which prints several lines)
Set a variable, caveNumber, to the results
of the chooseCave function
Ask the player if s/he wants to play
Again, get player’s input
Run checkCave function,
Using the caveNumber
Variable, to determine
whether or not the user
picked the friendly cave
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Ticket Out
 Please take out a piece of paper, put your name on it,
and answer these questions:
1. What is a global variable?, 2. What is a local variable?
3. What does the time.sleep (2) function do? 4. What’s
the proper name for the “2” in the time.sleep function
above? 5. What does the “2” do??
6. What does the “return” keyword do (on line 17)in the
following function?
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Wednesday, November 30th
 Warm Up: What is the purpose of the def function and
why would you use it in a program?
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Skills to create a program
 Get with your 8:00 clock partner
 Create a new python program, name it practice.py
 Write python code that accomplishes each of these
tasks (work on one of them at a time):
 NOTE: DO NOT USE the def function!!!!!
 NOTE: start a NEW program
 User chooses from a list of options
 Different programming based on the user’s choice
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More Skills to Create a
Program
 Create random variable
 Uses boolean operator to compare two variables and take
some action
 Allows user to choose ‘Play again”
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Next Steps
 Share python program with your partner
 Decide what program you would like to create for your
assessment
 Create a flow chart of the program
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Thursday, December 1st




Warm Up: SIT BY SAME PARTNER FROM YESTERDAY
Did you complete the first two tasks?
User chooses from a list of options
Different programming based on the user’s choice
 Which one have you struggled with the most?
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



User chooses from a list of options
Different programming based on the user’s choice
Create a variable and set it equal to a random number
Uses boolean operator to compare two variables and take
some action
 Allows user to choose ‘Play again”
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Friday, December 2nd
 Warm Up: Video
 Today: Create a flow chart for a Python program you
will make
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What’s a 4??
 Program is professional in quality and ready for
publication.
 Program has a clear purpose, and a clear ending.
 The program involves the user.
 The program has a logical ending or allows the user to
“play again”.
 Expertise in PYTHON is demonstrated.
 This program is a cut above the rest – clearly
demonstrating knowledge and expertise using
PYTHON.
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To Do
 Create flow chart – show it to Mrs. H for approval
 Begin work on your program
 Due: Wednesday 12/7
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Wednesday, December 7th
 Warm Up: Write in your journal three things you
learned from Mrs. Houtman’s presentation
 Today:
 Create a program in Python
 Show off your Python skills … check the rubric to make
sure your program is a “4”
 Due Thursday, December 8th
 NOTE: I’m still missing some flow charts!
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Thursday, December 8th
 USE THIS ENTIRE CLASS PERIOD TO PERFECT
YOUR PYTHON PROGRAM
 Friday:
 Peer Review, turn in program
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Friday, December 9th
 Warm Up: Please take a peer review rubric from the
table and then open your Python program
 Field Trip reminders
 Conduct peer review with your 3:00 clock partner – no
partner, meet at middle table and find someone
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Turn in your game
 Save your file using the proper name:
hour_lastname_firstname_python
CLOSE THE FILE
Go to :
www.dropitto.me/hasseld
Password = hasseld
Doesn’t ask for password? You are not on the proper
site!
Upload the file when done
 THEN TURN IN THE PEER REVIEW IN MY BOX!
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Wednesday, December 14th
 Warm Up: Please have your documentation from
Javascript up so Mrs. H can check it in – even if you
didn’t complete it, I want to see what you did get done
 Today: review guide for Python quiz – quiz on Friday
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