key definitions

headless system

system that does not require a screen such as microcontroller and raspberry pi. they use command line

directory

folder

cd

change directory

pwd

path to working directory

cd..

takes u to parent directory

if name of folder has space

it is a string, so put quote marks

nano

text editor

cat

read and manages other interactions with files, prints out contents of nano text file

unix system

operating system that manages computer hardware efficiently, multiuser. Linux and MacOS are examples

CLI

command line, how u communicate with unix

files/directory

how unix stores information

whitespace sensitive

tabs and spaces affect syntax and code meaning

syntax

set of rules that define correct structure and format of code in programming language

variables

labelled data that may change value

datatypes

type of data stored in variable

dynamic-typing

data type inferred from data stored in variable

identifier

name iof variable

namespace

mapping of names to objects

object

INSTANCE of class that encapsulates attributes and methods (data and behaviour)

__init__

constructor method, defines instance

declare and instantiate

declaring instance (variable) and giving it a value

IDE

provides tool for writing, editing, debugging in one place: integrated development environment

interpreted language

cannot send it live pieces of code

iterable

object that can be looped over, returning elements one at a time “for x in [1, 2, 3], return (x)

string x 3

stringstringstring

isinstance

returns true if object argument is instance of datatype for example isinstance(2,int)

ijk

used for counting and executes code as long as condition remains true

for item in range()

range is iterable, for is for loop

**

exponent

nested variable

if my variable > 20:

…….if my variable < 45:

…………..print(‘within range’)