The Python collections module provides several convenient classes for developers to use, among which the Counter class (a subclass of dict) can be applied in counting-related scenarios:
This article will introduce the usage of the Counter class and compare its performance with dict and defaultdict.
Posted on Apr 19, 2022 in Python Programming - Beginner Level by Amo Chen ‐ 5 min read
Python’s os module provides many convenient functions for us to manipulate file/folder paths. After Python 3.4, a new module called pathlib was introduced, which encapsulates various file/folder related operations in classes such as Path, making file/folder operations more object-oriented.
This article will explain and demonstrate the pathlib module.
Posted on Oct 19, 2020 in Python Programming - Beginner Level by Amo Chen ‐ 5 min read
Python’s built-in multiprocessing module is quite important if there are requirements for parallelism processing, in addition to the built-in threading module, another one is multiprocessing.
The advantage of using multiprocessing is that it can greatly avoid the impact of Python GIL on program performance, but the bad thing is that it consumes more memory. Even so, it is still a module that must be understood.
This article will learn how to use the multiprocessing module through several examples.
Last updated on Feb 8, 2023 in Python Programming - Beginner Level by Amo Chen ‐ 8 min read
Python has been evolving for nearly 10 years, so the development of Python projects also needs to consider the issue of version.
Especially now that Python 2 has retired, most Python projects now use Python 3 as the main version, but some of the old projects in companies still use Python 2 for development, so developers must switch between Python 2 and 3.
If you have trouble switching between Python versions, then pyenv will be your best friend!
Last updated on Mar 13, 2023 in Python Programming - Beginner Level , Useful Python Modules by Amo Chen ‐ 3 min read
Recently when I was looking at the source code of Elastic APM agent for Python, I saw that the developers of the project have used the atexit module to close the metrics collect timer before the APM agent shuts down.
Since I am not very familiar with atexit, I decided to study it in this article.
Last updated on Feb 20, 2023 in Python Programming - Beginner Level by Amo Chen ‐ 3 min read