Using types.MappingProxyType to create immutable mappings
types.MappingProxyType is a wrapper object that allows you to create an immutable mapping based on an existing dictionary. It provides read-only access to the dictionary's …
How to implement a queue in Python
Queues are a data structure used to store collections of elements in a first-in, first-out (FIFO) order. Just like in a real-life queue — whoever …
What does the takewhile() function from the itertools module do?
The takewhile() function from the itertools module creates an iterator that returns elements from an iterable as long as the specified condition is true (evaluates …
Starmap()
`starmap()` accepts another function and an iterable object as arguments, where the elements of the iterable are tuples. The passed function is applied to each …
Peewee is a lightweight ORM (Object-Relational Mapping) for Python
Peewee is a compact and easy-to-use ORM library for working with databases. It supports SQLite, MySQL, and PostgreSQL, providing a convenient API for working with …
DABL
DABL (Data Analytics in Business Language) is a Python library that simplifies the use of machine learning for data analysis. It provides a simple and …
Lecture 3: Working with files, processing and implementation of exceptions
Files The built-in method is used to open files. The path to the file is passed to this method as an argument - for example, …
Using defaultdict to simplify working with dictionaries
When working with dictionaries where you need to initialize default values for new keys, defaultdict from the collections module greatly simplifies this process. Using defaultdict …
Why use namedtuple instead of a regular dictionary?
The main advantage of namedtuple is that it takes up less space (memory) than an equivalent dictionary. Therefore, for large datasets, named tuples are more …
Sorting a list of dictionaries
There are tasks where it is necessary to sort a list of dictionaries in order to obtain a list sorted in a specific order based …
Automatic shutdown of a computer when the battery is low
The script checks the battery level and automatically shuts down the computer if the charge is below the specified threshold. #!/bin/bash # Battery level threshold …
Compress function
The compress function from itertools is used to filter elements from the input sequence based on the corresponding elements in a boolean sequence. The code …
Green threads
Green threads are execution threads that are managed by a virtual machine (VM) instead of the operating system. Green threads emulate a multi-threaded environment without …
Shallow Copying
Object copying can be performed as either "shallow" copying or "deep" copying. The difference between them lies in how nested objects are handled. In shallow …
Lecture 2: OOP: everything about inheritance, magic methods + metaclasses
Hello everyone! Let's talk about Object-Oriented Programming (OOP), but we're not going to delve into theoretical concepts, as some familiar concepts are not fully realized …
NetworkX
NetworkX is a Python library for analyzing complex networks. It provides data structures for working with graphs (networks) and implements many algorithms for network data …
Asynchronous code
Asynchronous code is an approach to writing code that allows multiple tasks to be executed simultaneously within a single process. This is achieved through the …
Why shouldn't you use an empty list as a default argument?
Default values for function arguments are evaluated only once when the function is defined, not each time it's called. Therefore, if you use a mutable …
Reg Organizer – Complete Removal of Programs
Reg Organizer is a pretty cool program that allows you to do two useful things at once. First, it can completely remove any program on …
Removing the background from an image
rembg is a useful library that easily removes the background from any photograph. Installation: pip install rembg
Dynamic module loading
Dynamic module loading in Python is the process of importing a module at runtime, as opposed to static imports that occur at compile time. This …