Python repr vs str
Understand repr vs str in Python and learn how to use them in any custom class. Examples of using repr for debugging.
Articles · page 7
Hashables in Python
A hashable is any object that returns its "Hash Code" when asked, and that code stays the same for the whole life of the object. Learn how it works in Python.
Mutable and Immutable Types in Python
Learn whether a variable can change (mutable) or not (immutable). Mutable: List, Dict, Set. Immutable: String, Int, Float, Bool, Tuple, Range, Decimal.
Building Your Own Collection in Python
Learn how to build your own Collection in Python step by step: Container, Sized and Iterable explained, plus the difference between an Iterator and an Iterable.
Streaming Tricks: Generators, Buffers, and Caches
Learn how to build a data stream by balancing memory use and processing time: buffer data for a steady flow, generate data on demand, and cache results.
*args and **kwargs in Python, with Examples
One of the things we all overlook when starting to learn Python, and one of the most puzzling, is functions (or methods) that take *args and **kwargs as parameters.
Binary: Combinations and Conversion
Learn how numeral system combination tables work and convert between binary, decimal, hexadecimal and octal with simple mental math.
Binary Number System
Learn what the binary number system is, how it relates to decimal, octal, hexadecimal and base 64, and how to read bases and number notations.
venv (virtual environments) in python
In this post we will show examples of how to use virtual environments (venv) in python to isolate our projects between each other
How to Build the Java 9 JDK
Learn how to build JDK 9 from source code, just ahead of its imminent release. A step-by-step guide to get the new Java version running on your machine.
Singleton Pattern in Python, with Examples
In this article we describe the Singleton pattern in Python, a pattern that makes sure a class has only one instance. Learn two ways to implement it.
Java Type Inference: The Diamond Operator
Java's diamond operator lets you cut down on verbosity when writing your code. Learn how it works with generics and type inference, and where it falls short.