A guide on using the FinanceDataReader library to get and analyze financial data. — FinanceDataReader is an open-source library for collecting and analyzing financial data such as price data (stocks, indices, exchange rates, futures, etc.) and stock listings in the Korean and global markets. The FinanceDataReader is a financial data reader(crawler) for finance. The main functions are as follows. Stock Symbol listings: ‘KRX’ (‘KOSPI’…

Remove images’ backgrounds using the Python library Rembg. — Installation This library is for Python 3.9 only CPU support: pip install rembg GPU support: pip install rembg[gpu] Usage as a CLI Remove the background from a remote image curl -s http://input.png | rembg i > output.png Remove the background from a local file rembg i path/to/input.png path/to/output.png Remove the background from all images in…

A guide on how to extract dates from a webpage using the library htmldate. — Recently I found a third-party library for Python called htmldate. After testing, it extracts the release time of news more accurately. Let’s see how this library is used. First, install using pip: python3 -m pip install htmldate Then, we use Requests to get the source code of the website: import…

Implement a simple web page with HTML and Python. — Sometimes, Python is not installed on our computer, but you need to verify the operation of a piece of Python code. Other times, you want to make a web page, but you only know HTML and Python. So if you want to make a web page with some complex logic…

A guide on generating dummy data using the Faker library. — Faker is a Python library that generates fake data. Fake data is often used for testing or filling databases with dummy data. Basic Usage Install with pip pip install Faker Examples: from faker import Faker faker = Faker() print(f'name: {faker.name()}') print(f'address: {faker.address()}') print(f'text: {faker.text()}') Output: name: Bryan Parks address: 762 Scott Branch Suite 151 Wilsonshire…

Yes, you read that right. In JDK-8, there are some bugs in ConcurrentHashMap, that may cause your trouble. — ConcurrentHashMap is one of the most frequently used collection classes in our daily work, Its characteristic is high performance and thread-safety. However, there are two bugs that impact the performance of this familiar map. The problem is in computeIfAbsent. computeIfAbsent blocks when multiple threads obtain the same key.

If you want to access the company server, you must jump to the target server through the bastion host. In this way, the Ops can efficiently and safely manage the company’s massive server cluster. But we all know that the improvement of security will reduce the efficiency of our daily…

The following article comes from Potter Reminder: There are many related tools in the software shared below. I only share the software that I think is better, and other similar software will not be listed. Drawing XMind If you can’t think of a thing or want to brainstorm, let xmind help you…

The following article comes from Potter Summary content Background of the project Resource volume after packaging Above the fold page loading speed Compression: Image\CSS\JS\Fonts\Html Tree Shaking splitChunks DNS-fetch CDN Acceleration After more than a week of hard work, I reduced the packaged resources of the project by 56%, and the loading speed…