PrimerPy

Decorator Side Effects

Decorator Side Effects 1.1 Decorator might change the function name In this post, we will deep-dive the side effects of decorators. recall our example before, print Unix Time everytime we run the fun

Filter

Filter Sometimes, we want to conduct some filtering on certain lists. In Python, there’s a really convenient way of doing it: filter 1. Definition Filter out elements not meeting our requireme

Iterator and Generator

Iterator and generator 1.1 Iterator Iterables include list, tuple and set iterator is a class regular class is not iterable class A: pass # class A is not iterable - we can use iterator to make a

Lambda Expression

Lambda Expression 1. Definition Functional programming is a way of thinking. When using lambda, we don’t need to give a function name. It’s very similar to the arrow functions in Javascri

List Comprehension

List Comprehension Create a new list from another list x is a int list between -100 and 100 get a new list of x square There are at least 3 ways: 1.1 Three methods in Python List comprehension [

Map

1. Map 1.1 Map Definition map is a class in python, it accepts two parameters, the first one is a function, the second one is an iterable object, e.g. a list, tuple etc. map is usually used convertin

Reduce

1. Reduce 1.1 Definition Reduce is another important function for functional programming Unlike map, which is a global class, reduce should be imported from functools library reduce takes three param

Switch in Python

Switch in Python Python doesn’t have switch, which is common in other languages For example, switch in javascript switch(expression) { case x: // code block break; case y: // code block break;

Tenary Conditional Expression

1. Ternary Conditional Operator In simple words, it is just an if-else statement in expression format, it exists in many other languages with a different format, e.g. we want to compare two numbers x,

Functional Programming

Imperative Programming vs. Functional Programming So far, we’ve encountered two types of programming paradigm: Imperative and Functional. Imperative Programming However hard the logic may be, al