Clean Code Development With Python (2023-03-28 - 2023-03-29)

Github Repository

• https://github.com/jfasch/2023-03-28.git

Work Environment

• Python Installation

  • Installing directly from python.org

  • Anaconda

• IDE

  • Visual Studio Code for Python Programming

  • PyCharm

• Package Installation, Virtual Environments

  • Python Package Index

  • Virtual Environments

Day 1

Introduction

Clean Code?

From Is Software A Craft? Software Is A Craft! ⟶ Clean Code:

• What’s There? What Have We Accomplished?

Demo Hacking

• A Typical Project (Livehacking Screenplay: My Own Bookkeeping Effort)

The demo hacking session was extended through the entire session, with topics woven in as time seemed right. Read on for those.

Python Development: Select Topics

Knowing more about Python enables one to write … well … more code in fewer lines. While that is not usually an attitude of programmers that everybody loves, in Python there’s a word for it: Pythonic. An early PEP, “PEP 20 – The Zen of Python” describes what that could be. Lets have a closer look at what today’s version of the language offers in that respect.

Built-In Types: Facts

• References, (Im)mutability

• Comprehensions (List, Dictionary, Set)

for Loops, And The Iterator Protocol

• From Iteration, Comprehensions, and Generators

  • The Iterator Protocol

Day 2: Clean Code? (Software Development: A Craft)

Closures, And Function Parameters

See also

• Closures

• Positional and Keyword Arguments

functools.partial was used yesterday to augment os.listdir() with the dirname: provide my own version, using a closure

Generators (Again), yield Fixtures, And yield Context Managers

See also

• Implementing A Fibonacci Number Generator

• pytest Introduction, By Example

• Context Managers: The with Statement

• Generator recap: Implementing A Fibonacci Number Generator

• More pytest (yield-fixtures)

  • How come pytest provide fixtures by saying test_blah(tmpdir)? ⟶ inspect — Inspect live objects

  • pytest Introduction, By Example

  • pytest.monkeypatch (mocking os.listdir()) (How to monkeypatch/mock modules and environments)

• While we are at yield-fixtures: contextlib (Context Managers: The with Statement)

Object Oriented Programming

(Maybe begin with operator overloading?)

From Object Oriented Programming:

• Classes And Dictionaries

• Constructor

• Methods

• str() And repr()

• Properties

• collections.namedtuple

• Inheritance

• Operator Overloading

• Abstract Base Classes (abc), And Duck Typing

Untold

Decorators (The Ominous @)

• Positional and Keyword Arguments

• Closures

• Decorators

Exceptions

• Exception Handling

Modules And Packages

• Modules and Packages

Pandas

From Pandas:

• Pandas: Basics (DataFrame And Series)

• Pandas: Selecting Rows (And Columns) With iloc[]

• Pandas: Selecting Rows (And Columns) With loc[]

• Pandas: Indexes

• Pandas: Filters

• Pandas: Adding/Modifying Columns

• Pandas: Adding Rows

Design Patterns

Discussion: so what? OO is there to solve problems in a readable and reproducible way.

• UML Short Introduction

• OO Design Principles

• Pythonize some patterns (the simpler ones) from Design Patterns With C++. Maybe …

  • Adapter

  • Proxy

  • Composite

  • Observer