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
Evaluating Expressions with Python eval() Function
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🐍 Python Term of the Day: Unicode (Python Glossary) Unicode is a universal character encoding standard that assigns a unique number (code point) to every character in every language, plus symbols, emojis, and control characters. https://lnkd.in/gMsCtXD3
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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
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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?
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One concept in Python that appears simple but carries deeper implications is mutability. On the surface, we categorize: - Lists and dictionaries as mutable - Strings and tuples as immutable However, the real impact becomes clear when considering memory and references. In Python, variables do not store values directly; they store references to objects. Thus, when you assign one variable to another, you are not copying data — you are pointing to the same object in memory. This distinction leads to very different behaviors between mutable and immutable types. With immutable objects, any modification results in the creation of a new object. In contrast, mutable objects allow the original object to be modified in place. This difference directly influences: - How functions behave - How data flows across modules - The emergence of subtle bugs in production Understanding this concept has aided me in debugging issues that initially seemed perplexing. It has also transformed my perspective on passing data between functions. Sometimes, the problem lies not in the logic but in how the data is being referenced. #Python #SoftwareEngineering #BackendDevelopment #Programming
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🐍 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
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Mastering Conditional Logic in Python As part of my Python practice, I worked on a problem that strengthens decision-making using conditional statements. n = int(input()) if n % 2 != 0: print("Weird") elif n % 2 == 0 and 2 <= n <= 5: print("Not Weird") elif n % 2 == 0 and 6 <= n <= 20: print("Weird") else: print("Not Weird") ->What this program does: Takes an integer as input Checks whether the number is odd or even Applies multiple conditions to decide the output -> Logic Breakdown: Odd numbers → Weird Even numbers (2 to 5) → Not Weird Even numbers (6 to 20) → Weird Even numbers (>20) → Not Weird -> Example: Input: 3 → Output: Weird Input: 24 → Output: Not Weird -> Key Takeaways: Understanding if-elif-else is essential for real-world problem solving Combining conditions using and improves control over logic Writing clean conditional code builds strong programming fundamentals #Python #CodingJourney #ProblemSolving #100DaysOfCode #LearningPython #ProgrammingBasics
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Built a small Python script that auto-organizes files in a folder by type like images, videos, documents, code files and more. Nothing fancy, just a useful little tool I made for myself. Open-source if anyone wants it. GitHub: https://lnkd.in/gt8cEsYf #Python #Automation #OpenSource
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