In <span>Python</span>, the assignment statement (<span>obj_b = obj_a</span>) does not create a true copy. It merely creates a new variable using the same reference. Therefore, when you want to make an actual copy of mutable type objects (like lists and dictionaries) and modify the copy without affecting the original object, you must be particularly careful. … Read more
Hello everyone, today I want to introduce a super useful Python library – python-dotenv. When developing projects, we often need to manage various configuration information, such as database passwords, API keys, etc. Writing these sensitive information directly in the code is not a good idea! python-dotenv is specifically designed to solve this problem, allowing us … Read more
Python’s GUI Big Brother – Understanding Tkinter Hey, want to create a small window program with Python but don’t know where to start? You’ve come to the right place! Tkinter is the built-in GUI (Graphical User Interface) Swiss Army knife of Python! No need for extra installations, it’s ready to use right out of the … Read more
Click on the “Python Beginner to Advanced” public account, select “Star“ Essential content delivered promptly [For reprints, please message the author] Q: What’s the best way to learn to code? A: Code daily! Welcome here! First, welcome to the Python Mastery Program, I hope this is not just a challenge for you, but also a … Read more
▼ Click the card below to follow me ▲ Click the card above to follow me Graphviz: Create Fancy Relationship Diagrams with Python! There are many amazing visualization tools in the Python world, and today I want to introduce a super cool library – Graphviz. Imagine being able to quickly draw complex network diagrams, flowcharts, … Read more
“A little gesture, please give a follow~”👇 I have once been scarred, I have once wandered far and wide. This is not my desolation, this is my medal. When one day someone asks about my past, I will be proud, not for those scars that have healed, but for the time when I chased my … Read more
▼ Click the card below to follow me ▲ Click the card above to follow me Addict: Making Dictionary Operations Super Simple! In the world of Python, dictionaries are one of the most commonly used data structures. However, traditional dictionary operations often feel a bit cumbersome and not very intuitive. Today, I want to introduce … Read more
In classification, there are many different evaluation metrics. The most commonly used is accuracy, which measures the frequency of correct predictions made by the model. Accuracy is a good metric because it is easy to understand, and we generally want to achieve the most correct guesses. In some cases, you may need to consider using … Read more
The Magic of Python’s lru_cache: Enhancing Function Performance Dialogue Transcript Novice: (frustrated) Some of the functions I wrote take a long time to compute, and they have to recalculate every time they are called. Is there any way to optimize this? Expert: (with a mysterious smile) You must learn about the magical feature called lru_cache! … Read more
Introduction Processes in Python from multiprocessing import Process import time def print_numbers(): for i in range(10): time.sleep(1) print(i) def print_letters(): for letter in 'abcdefghij': time.sleep(1) print(letter) if __name__ == '__main__': process1 = Process(target=print_numbers) process2 = Process(target=print_letters) process1.start() process2.start() process1.join() # join method is used to wait for the process to finish process2.join() —— $ python … Read more