/iaia-python

MIT LicenseMIT

Syllabus

Thursday, October 18th 2018

Introduction

A little command line

  • the terminal: opening it and reading it
  • how spaces are used to separate arguments
  • change directories: cd
  • list directory contents: ls
  • directory shortcuts: ~, . and ..
  • where am I? print working directory: pwd
  • make and remove files: touch and rm
  • make and remove directories: mkdir and rmdir
  • running python: interactive mode (REPL) vs. executing a .py file

Python Basics

  • ints/floats
  • math operations: +, -, *, /, **, %
  • strings
  • errors are good: line numbers, understanding them
  • variables and assignment
  • builtins: print, input
  • equality operators: ==, !=, >, <, >=, <=
  • booleans: True, False
  • Using and and or
  • if statements: if, elif, else

Discussion: formatting and style. Snake case. The importance of indentation and how it's different from other languages. PEP 8. A Foolish Consistency is the Hobgoblin of Little Minds.

First project: talk to the machine.

Using input, if statements, and print, write a program that asks a question and reacts to the response. Then, let your neighbor try your program.

Thursday, October 25th 2018

Digging in

Recap and stuff we missed

  • moving files: the mv command
  • the DRY principle
  • making things more robust

More Python

  • functions: def keyword, positional arguments, keyword arguments, return
  • data structures: lists, tuples
  • looping: for with lists and range
  • list operations: list indexes, len, append, pop
  • using the import statement
  • using random with randint and choice

Thursday, November 1st 2018

Getting started with packages: Pillow

Package managers and virtual environments

  • extending functionality with packages
  • first package: pip, the better package manager
  • second package: virtualenv
  • using virtual environments to isolate projects
  • activating the virtual environment with source venv/bin/activate
  • deactivating with deactivate
  • our first fun package: Pillow for image manipulation

Playing with images in programs

  • the import statement
  • from [package] import [class or function]
  • the Image class
  • the dir function
  • getting the image with Image.open
  • saving an image to a new format with Image.save
  • getting image size with Image.size
  • resizing with Image.resize
  • messing with pixels
  • getpixel and putpixel