Python week 2 2019 2020 for g10 by eng.osama ghandour

Agenda of LO CS.1.07 W1
1- Warm up about programming 10 min
2- ppt teacher demonstrate about Python 15m
3- Video about Python 5min
4- Practical work Students divided in pairs and use
Anaconda : Spyder or on line Python platform to
create very simple program using python
-3.8.1 7
- Questions and answers as pretest about Python 5 m
8-Refelection 5 min
9- Home work 5 min
Python
Eng. & Educator Osama
Ghandour

LO CS.1.07 W1 - Gain
knowledge and understanding
the meaning of computer
language? 2- Draw conclusions
about concepts: data types,
variables, Conditional
statements, looping statements,
functions and Object Oriented
Programming. Lesson plan
Python
Ghandour

Warm Up
Listen to this video
Offline
On line
Python
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Essential Question
1- What is meant
by programming
language and give
some examples?
Python
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Essential Question
What are the key
features or
characteristics
of language?
Python
Ghandour

Warm up 5 min
1. meaning of computer language.
2. data types.
3. Variables.
4-Expressions .
5-Python platforms
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Python

Anaconda : Spyder or an on line Python platform
Inputs : 1- though console 2- input message 3- sensors 2- Dataset
Python – Cheat sheets
You can install python-2.7.17 or python-3.8.1
Write Program / Code
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Python

Installing Anaconda
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Anaconda > Use Spyder
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Python

Coding window – Ipython console - Variable explorer
Spyder
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• code or source code: The sequence of
instructions in a program.
• syntax: The set of legal structures and
commands that can be used in a particular
programming language.
• output: The messages printed to the user by a
program.
• console: The text box onto which output is
printed.
– Some source code editors pop up the console as
an external window, and others contain their own
console window.
Programming basics
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Compiling and interpreting
in Python.
Offline On line
Offline On line
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Python

Compiling and interpreting
• Many languages require you to compile
(translate) your program into a form that the
machine understands.
• Python is instead directly interpreted into
machine instructions.
compile execute
outputsource code
Hello.java
byte code
Hello.class
interpret
outputsource code
Hello.py
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Expressions
• expression: A data value or set of operations to compute
a value.
Examples: 1 + 4 * 3
42
• Arithmetic operators we will use:
– + - * / addition, subtraction/negation, multiplication,
division
– % modulus, a.k.a. remainder
– ** exponentiation
• precedence: Order in which operations are computed.
– * / % ** have a higher precedence than + -
1 + 3 * 4 is 13
– Parentheses can be used to force a certain order of evaluation.
(1 + 3) * 4 is 16
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Numbers
• The usual suspects
• 12, 3.14, 0xFF, 0377, (-1+2)*3/4**5, abs(x), 0<x<=5
• C-style shifting & masking
• 1<<16, x&0xff, x|1, ~x, x^y
• Integer division truncates :-(
• 1/2 -> 0 # 1./2. -> 0.5, float(1)/2 -> 0.5
• Will be fixed in the future
• Long (arbitrary precision), complex
• 2L**100 -> 1267650600228229401496703205376L
– In Python 2.2 and beyond, 2**100 does the same thing
• 1j**2 -> (-1+0j) Eng. & Educator Osama
Ghandour

Variables
• variable: A named piece of memory that can store a value.
– Usage:
• Compute an expression's result,
• store that result into a variable,
• and use that variable later in the program.
• assignment statement: Stores a value into a variable.
– Syntax:
name = value
– Examples: x = 5
gpa = 3.14
x 5 gpa 3.14
– A variable that has been given a value can be used in expressions.
x + 4 is 9
• Exercise: Evaluate the quadratic equation for a given a, b, and c.
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Syntax:
print "Message"
print Expression
–Prints the given text message or expression value on the
console, and moves the cursor down to the next line.
print Item1, Item2, ..., ItemN
–Prints several messages and/or expressions on the same line.
• Examples:
print "Hello, world!"
age = 45
print "You have", 65 - age, "years until
retirement"
Output:
Hello, world!
You have 20 years until retirement
print
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•input : Reads a number from user input.
–You can assign (store) the result of input into a variable.
–Example:
age = input("How old are you? ")
print "Your age is", age
print "You have", 65 - age, "years until
retirement"
Output:
How old are you? 53
Your age is 53
You have 12 years until retirement
• Exercise: Write a Python program that prompts the
user for his/her amount of money, then reports how
many Nintendo Wiis the person can afford, and how
much more money he/she will need to afford an
additional Wii.
Input
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Repetition (loops)
and Selection (if/else)
What we will Learn today
?

Donkey work =
repetition = iteration –
loops – inside it there
are conditions

Text processing
• text processing: Examining, editing, formatting text.
– often uses loops that examine the characters of a string
one by one
• A for loop can examine each character in a string in
sequence.
– Example:
for c in "booyah":
print c
Output:
b
o
o
y
a
h
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Strings and numbers
• ord(text) - converts a string into a number.
– Example: ord("a") is 97, ord("b") is 98, ...
– Characters map to numbers using standardized mappings such
as ASCII and Unicode.
• chr(number) - converts a number into a string.
– Example: chr(99) is "c"
• Exercise: Write a program that performs a rotation cypher.
– e.g. "Attack" when rotated by 1 becomes "buubdl"
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Python

DrawingPanel
• To create a window, create a drawingpanel and
its graphical pen, which we'll call g :
from drawingpanel import *
panel = drawingpanel(width, height)
g = panel.get_graphics()
... (draw shapes here) ...
panel.mainloop()
• The window has nothing on it, but we can draw
shapes and
lines on it by sending commands to g .
– Example:
g.create_rectangle(10, 30, 60, 35)
g.create_oval(80, 40, 50, 70)
g.create_line(50, 50, 90, 70)
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Graphical commands
Command Description
g.create_line(x1, y1, x2, y2) a line between (x1, y1), (x2, y2)
g.create_oval(x1, y1, x2, y2) the largest oval that fits in a box with
top-left corner at (x1, y1) and
bottom-left corner at (x2, y2)
g.create_rectangle(x1, y1, x2, y2) the rectangle with top-left corner at
(x1, y1), bottom-left at (x2, y2)
g.create_text(x, y, text="text") the given text at (x, y)
• The above commands can accept optional outline and fill
colors.
g.create_rectangle(10, 40, 22, 65,
fill="red", outline="blue")
• The coordinate system is y-inverted:(0, 0)
(200, 100)
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Drawing with loops
• We can draw many repetitions of the same
item at different x/y positions with for loops.
– The x or y assignment expression contains the
loop counter, i, so that in each pass of the loop,
when i changes, so does x or y.
from drawingpanel import *
window = drawingpanel(500, 400)
g = window.get_graphics()
for i in range(1, 11):
x = 100 + 20 * i
y = 5 + 20 * i
g.create_oval(x, y, x + 50, y + 50, fill="red")
window.mainloop()
• Exercise: Draw the figure at right.
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Further programming
• Lab exercises
– Let's go downstairs to the basement computer
labs!
– All resources are available at the following URL:
• http://faculty.washington.edu/stepp/cs4hs/
• What next?
– Lists , Dictionaries , data structures
– Algorithms: searching, sorting, recursion, etc.
– Objects and object-oriented programming
– Graphical user interfaces, event-driven
programming Eng. & Educator Osama
Ghandour

Check your email to Solve the
Online auto answered
quiz 15 min after
school the quiz will be
closed in 10:00pm
after
tomorrowEng. & Educator Osama
Ghandour
Python

Repetition (loops) in
Python.
Offline On line
Offline On line
Ghandour
Python

Selection (if/else) in
Python
Offline On line
Offline On line
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Python

Summary
1-Repetition (loops).
2- Selection (if/else).
3- Compile the program (Run).
Ghandour
Python

Prepare for next week
According to student’s law
Gn=Wn % Ng
CS.1.07 - 1- Gain knowledge
and understanding the
meaning of computer
language? 2- Draw conclusions
about conceptsEng. & Educator Osama
Ghandour
Python

Reflection
• What is your goal to accomplish in
next week End Using Python?
Eng. and Educator Osama
Ghandour
Python

Home work (s. proj.) 1
• Create a presentation contains some
concepts of computer languages (Python)
and display the Concepts of Repetition
(loops) and Selection (if/else)following the
bellow rubric .
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Python

Rubaric
Blue
Design a presentation showing Python to contain some
concepts Repetition (loops)
and Selection (if/else)
Green
Design a presentation showing Python to contain one or
2 Repetition (loops) and Selection (if/else).
Yello
w
missing two points of green level.
Read No presentation .
Ghandour
Python

Resources
• https://www.youtube.com/watch?v=Rtww83GH
0BU
• Other materials:
• https://www.sololearn.com
• https://www.w3schools.com
• www.python.org
Ghandour
Python

Resources
• https://www.youtube.com/user/osmgg2
Other materials:
• https://www.sololearn.com
• https://www.w3schools.com
• www.python.org
• “Learning Python,” 2nd edition, Mark Lutz
and David Ascher (O'Reilly, Sebastopol, CA,
2004) (Thorough. Hard to get into as a quick
read)
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Python

Learn and practice through on line web sites
https://www.thewebevolved.com
https://www.123test.com/
https://www.wscubetech.com/
https://www.w3schools.com/
https://www.guru99.com
https://codescracker.com/exam/review.php
https://www.arealme.com/left-right-brain/en/
https://www.proprofs.com/
https://www.geeksforgeeks.org/
https://www.tutorialspoint.com
https://www.sololearn.com
http://www.littlewebhut.com/
Ghandour
Python

If you do not feel happy, smile
and pretend to be happy.
• Smiling produces seratonin
which is a neurotransmitter
linked with feelings of
happiness

Thanks
Engineer and educator/ Osama G. Geris
Ghandour
Python

https://twitter.com/osamageris
https://www.linkedin.com/in/osamaghandour/
https://www.youtube.com/user/osmgg2
https://www.facebook.com/osama.g.geris
Ghandour
Python

Python week 2 2019 2020 for g10 by eng.osama ghandour

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Python week 2 2019 2020 for g10 by eng.osama ghandour