Iskills: programming in Python from scratch!...Oct 28, 2018 · Iskills: programming in Python from scratch! Louis de Thanho er October 28, 2018 Louis de Thanho er Iskills: programming

Iskills: programming in Python from scratch!

Louis de Thanhoffer

October 28, 2018

Louis de Thanhoffer Iskills: programming in Python from scratch! October 28, 2018 1 / 25

What are we doing today?

Giving you a good idea of what programming is and how it works:

1 some of the history

2 what a programming language is (and why we need it)

3 the fundamentals of a programming language (in Python)

4 trying things yourself: playing tic-tac-toe






























the history of programming

Charles Babbage (1837) : produces the first machine to mechanicallydo math using rotors. It already has ”logic” and memory”



Charles Babbage (1837) : produces the first machine to mechanicallydo math using rotors. It already has ”logic” and memory”



Ada Lovelace (nee Byron): works with Babbage and produces thefirst ”algorithm”



Ada Lovelace (nee Byron): works with Babbage and produces thefirst ”algorithm”



Alan Turing (’39): invents computing and cracks Enigma (essentiallywinning WW2)



Alan Turing (’39): invents computing and cracks Enigma (essentiallywinning WW2)



Konrad Zuse (’41): builds the first digital computer during WW2(inventor of the computer)



Konrad Zuse (’41): builds the first digital computer during WW2(inventor of the computer)



John Backus: invents the first (real) programming language: Fortran



John Backus: invents the first (real) programming language: Fortran


Bill Gates makes the first basic interpreter on the altair crating thefirst software company (72)

Jobs works with gates on implementing basic in the Apple 2

Gates clones GUI on Windows and so it begins...














Guido Van Rossum invents Python (named after Monty Python) tobe a very easy to use and flexible language


Guido Van Rossum invents Python (named after Monty Python) tobe a very easy to use and flexible language


Why programming?

Think about calculators....

What if you had to understand exactly how every part of a calculatorworks in order to use it?

That would be impossible!

Enter programming languages..

you can now easily use a calculator

and pick up any one from your favorite Dollarama


Why programming?








Why programming?








Why programming?








Why programming?








Why programming?








How do they work?


How do they work?


Machine language

Tell the computer exactly what to do with each step of the program (interms of bits)


Assembly language

Use a set of easier commands to implement machine language


higher level language

Build a whole language that in turn interprets the set of instructions(compiles), translates into assembly and machine language


Python

Python is such an example and particularly good at its job:

...compare other languages:


Python




Python




What is a programming language?

vocabulary: data structures

primitive: integers, fl. point, yes/no, characters

composite: lists, dictionaries

math: arrays, matrices

grammar: functionalities

operations: +, -,*...

logical statements: if, while, for...

functions










functions










functions










functions










functions










functions










functions










functions










functions


Let’s try it out:

We’ll open a programming language right from our browser:

go to Jupyter.org

try it in your browser

try JupyterLab

remove the Lorentz file (that’s just an example)

go to file/new/notebook and select the Python 3 kernel

print(”hello world”)

run the program


Let’s try it out:

We’ll open a programming language right from our browser:

go to Jupyter.org

try it in your browser

try JupyterLab

remove the Lorentz file (that’s just an example)

go to file/new/notebook and select the Python 3 kernel

print(”hello world”)

run the program



primitive data types

integers: 1,2, etc

floating point: pi

characters: ’hello’

find out the type using type()


primitive data types

integers: 1,2, etc

floating point: pi

characters: ’hello’

find out the type using type()


lists

a way to enumerate primitive data types: declare using [] notation


dictionaries

describe an assignment of keys to values

get the value of the key using []

d = ’hello’: 1, ’world’: 2


dictionaries

describe an assignment of keys to values

get the value of the key using []

d = ’hello’: 1, ’world’: 2


arrays

1 uses the library numpy, so import numpy as np

2 similar to lists but we can use math!

3 declare as np.array()

declare l = [1,2,3] as a list vs array...what happens?


arrays

1 uses the library numpy, so import numpy as np

2 similar to lists but we can use math!

3 declare as np.array()

declare l = [1,2,3] as a list vs array...what happens?


matrices

1 uses the library numpy again, so import numpy as np

2 like arrays in multiple dimensions


logical statements

a way to enumerate primitive data types: declare using [] notation

to find the first 10 squares: [x*x for x ≤ 10]


functions

input variables using brackets

declare as def

indent the body

output variables using return

build a function that returns the squares: def(x) return x ∗ x


functions

input variables using brackets

declare as def

indent the body

output variables using return

build a function that returns the squares: def(x) return x ∗ x


tic-tac-toe

Now let’s try and build tic-tac toe!

go to github.com/ldethanhoffer/tic-tac-toe

download tic-tac-toe

upload to jupyter


Iskills: programming in Python from scratch!...Oct 28, 2018 · Iskills: programming in Python from scratch! Louis de Thanho er October 28, 2018 Louis de Thanho er Iskills: programming

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