#python

• 27 Oct 2023 · Study

  Python · venv and pip

  Isolating project dependencies with venv, installing with pip, and pinning versions in requirements.txt.

• 24 Oct 2023 · Study

  Python · Decorators

  Functions as objects, closures, writing decorators with functools.wraps, and decorators that take arguments.

• 19 Oct 2023 · Study

  Python · Generators

  Generator functions with yield, lazy evaluation, infinite sequences, pipelines, and itertools.

• 16 Oct 2023 · Study

  Python · Iterators

  The iterator protocol behind every for loop: iter(), next(), StopIteration, and writing an iterator class.

• 11 Oct 2023 · Study

  Python · OOP: inheritance and dunder methods

  Subclassing with super(), method overriding, and dunder methods (__repr__, __eq__, __len__, __add__) that plug objects into Python syntax.

• 6 Oct 2023 · Study

  Python · OOP: classes and objects

  Defining classes, __init__ and self, instance vs class attributes, methods, and properties.

• 3 Oct 2023 · Study

  Python · Exceptions

  try/except/else/finally, catching specific exceptions, raising your own, and custom exception classes.

• 29 Sept 2023 · Study

  Python · Files: reading and writing

  Opening files with with-blocks, text vs binary modes, encodings, reading line by line, and pathlib.

• 26 Sept 2023 · Study

  Python · Modules and imports

  How import finds modules, the different import forms, packages with __init__.py, and the if __name__ == "__main__" guard.

• 21 Sept 2023 · Study

  Python · Comprehensions

  List, dict and set comprehensions, filtering with if, nested loops, and when a generator expression is the better choice.

• 18 Sept 2023 · Study

  Python · Functions: *args, **kwargs and scope

  Variable-length arguments with *args and **kwargs, keyword-only parameters, unpacking at the call site, and LEGB scope.

• 13 Sept 2023 · Study

  Python · Functions: arguments and return values

  Defining functions, positional vs keyword arguments, default values, the mutable-default trap, and returning several values.

• 8 Sept 2023 · Study

  Python · Control flow: if, for, while

  if/elif/else, for loops over iterables with range, enumerate and zip, while loops, and break/continue/else.

• 5 Sept 2023 · Study

  Python · Sets

  Sets for uniqueness and fast membership tests, plus union, intersection and difference.

• 1 Sept 2023 · Study

  Python · Dictionaries

  Dictionaries for key-value lookups: get() with defaults, iterating items(), insertion order, and counting with Counter.

• 29 Aug 2023 · Study

  Python · Tuples and unpacking

  Tuples as fixed records, the one-element tuple comma, unpacking with *rest, and swapping without a temp variable.

• 24 Aug 2023 · Study

  Python · Lists

  Lists as mutable sequences: append vs extend, slicing, sorting in place vs sorted(), and the aliasing trap.

• 21 Aug 2023 · Study

  Python · Strings: f-strings and formatting

  f-strings, the format mini-language (width, precision, alignment, thousands separators) and the = debugging shortcut.

• 16 Aug 2023 · Study

  Python · Strings: indexing, slicing, methods

  Strings as immutable sequences: indexing, negative indexes, slicing with steps, and the common methods.

• 11 Aug 2023 · Study

  Python · Types: int, float, bool, None

  Python's basic scalar types, why 0.1 + 0.2 is not exactly 0.3, and how None differs from False.

• 8 Aug 2023 · Study

  Python · Syntax: indentation, comments, print

  How Python uses indentation instead of braces, how comments work, and the options print() takes.

• 4 Aug 2023 · Study

  Python · Setup: installing Python and running a script

  Day one: installing Python 3, checking the version, and running a first script from the terminal.