Real Python’s Post

Evaluating Expressions in Python using eval() While practicing on HackerRank, I explored the power of Python’s built-in eval() function. *Problem Statement: Read a mathematical expression from input and evaluate its result. Solution: # Enter your code here. Read input from STDIN. Print output to STDOUT expression = input() print(eval(expression)) * How it works: input() takes the expression as a string (e.g., "3 + 5 * 2") eval() evaluates the string as a Python expression The result is printed directly Example: Input: 3 + 5 * 2 Output: 13 *Important Note: eval() is powerful but should be used carefully, as it can execute arbitrary code. It’s safe in controlled environments like coding platforms, but not recommended for untrusted input in real-world applications. -> Always exciting to learn how Python simplifies complex tasks with minimal code! #Python #HackerRank #CodingPractice #Programming #LearnToCode #100DaysOfCode

🐍📺Check if a Python String Contains a Substring [Video] In this video course, you'll learn to check whether a string contains a substring. You'll also learn about idiomatic ways to inspect a substring further and search for substrings in pandas #python

Python "Gotchas": Are you using mutable default arguments correctly? 🐍 In Python, default arguments are evaluated only once at the time of function definition, not every time the function is called. This can lead to unexpected "shared state" bugs that are a nightmare to debug in production. In this video, I break down: ✅ The common mistake with list=[] ✅ Why to=None is the industry standard fix ✅ How to write cleaner, bug-free Python code Have you ever been bitten by this specific Python behavior? Let’s discuss in the comments. #Python #SoftwareDevelopment #Programming #DataScience #CleanCode #TechTips

Rules for declaring python veriables:- 1) Must start with letters (a-z, A-Z) or underscore _ 2)Must not start with numbers (1 to .... ) 3) Variables are case sensitive ( python and Python both are different) 4) We cannot use keywords as variables ( if, def, while ...) Variable declaration is main part of any program. First impression will be starting with it, so while declaring variables need to take care. #python #learn #fast #beginner #automation

Most Python beginners get confused with this. == vs = They look similar. But they are completely different. = → Assignment operator Used to store a value Example: x = 10 == → Comparison operator Used to compare values Example: x == 10 One stores value. One checks value. Understanding this small difference can save you from many errors. 👉 Did you know this difference before? #python #BluJayTechnologies #SoftwareCoaching #Series

🐍 Python Term of the Day: pass (Python Keywords) A placeholder statement that allows you to write syntactically correct code without executing any operations. https://lnkd.in/e5cJqaah

STREAMLIT A new Python library that lets you make web-based user interfaces with pure Python. And since I discovered this, it's been my absolute go-to for spinning up simple Python websites. It's extremely useful for data science and AI-related apps: https://streamlit.io/ #WebApps#WebAppDevelopment#AntonGlenbovith#Dashboards#PythonProgramming

Ever had your Python code fail… even when it looks correct? 🤔 The problem might be data types. For example: age = "25" print(age + 5) ❌ Error This happens because Python doesn’t automatically convert types for you. That’s where type conversion (casting) comes in. 👉 int() 👉 float() 👉 str() Understanding this will save you from many beginner errors. 💬 Have you faced this issue before?

The most misunderstood line of code in Python🛑 if __name__ == "__main__" Most beginners copy-paste this without knowing what it actually does. If you've ever imported a file and had your entire script execute unexpectedly—this is why. In this 2-minute breakdown, I explain: ✅ What __name__ actually stores. ✅ Why your code runs differently when imported vs. executed. ✅ How to structure your scripts like a Senior Dev. Master the most misunderstood line in Python here: https://lnkd.in/e5gEGpYq #python #codingtips #backend #microlearn #pythonifnamemain

In case you are looking for something interesting to read about Python, here's a stack overflow answer on why Tuples are more efficient than Lists: #python https://lnkd.in/ddzr-GuP