Python Writing to Existing or New Files with open() Function

Your #Python function takes a filename and **kwargs. But this raises an error, since "filename" is passed twice: myfunc('outfile.txt', filename='abcd', x=100) Solution: Set filename to be positional only: def myfunc(filename, /, **kwargs): Now *any* keyword argument works!

Did you know? Python versions >= 3.11.7, has set a limitation on the number of digits(i.e 4300) that can be convert string to integer and vice-versa. This is to prevent the Dos attack and low conversion speed, defined in `CVE-2020-10735`. If you want to convert more than that, then you will have to update the setting by using the following: ``` import sys sys.set_int_max_str_digits(452463) # or any number you want ``` #python #python_spec #language_updates #features

FastAPI Tip: BaseModel makes ALL the difference While learning FastAPI, I realized how powerful Pydantic BaseModel really is. 🔴 Without BaseModel -->Data comes from URL/query params -->No validation -->No type checking -->Not scalable . 🟢 With BaseModel -->Data comes from JSON request body -->Automatic validation -->Type safety + defaults -->Clean, production-ready APIs . #FastAPI #Python #Pydantic #BackendDevelopment #APIs #LearningJourney

LeetCode POTD 💫: Description: You are given a string s consisting only of characters 'a' and 'b'. You can delete any number of characters in s to make s balanced. s is balanced if there is no pair of indices (i,j) such that i < j and s[i] = 'b' and s[j]= 'a'. Return the minimum number of deletions needed to make s balanced. Here's my solution: https://lnkd.in/gJRYcrxV #Python #DSA #Leetcode #DailyChallenge

Tuples in Python: Immutable (cannot be changed after creation), ordered collection that allows duplicate elements. Syntax:() Two methods: Index(),count() Python 3.14.0 (tags/v3.14.0:ebf955d, Oct 7 2025, 10:15:03) [MSC v.1944 64 bit (AMD64)] on win32 Enter "help" below or click "Help" above for more information. >>> #tuples() >>> a=(4,5.7,"python",4+9j,True,False) >>> print(a) (4, 5.7, 'python', (4+9j), True, False) >>> type(a) <class 'tuple'> >>> len(a) 6 >>> a.count("python") 1 >>> a.index(True) 4 Pooja Chinthakayala Mam,Saketh Kallepu Sir,Uppugundla Sairam Sir

What Really Happens When You Pass a Variable to a Function in Python? In Python, variables don’t hold values — they hold references to objects. When you pass a variable to a function: 👉 Python passes the reference, not a copy of the object. This model is often called “pass-by-object-reference” (or call by sharing). Why this confuses people? Immutable objects (int, str, tuple): Reassignment inside a function creates a new object → original stays unchanged. Mutable objects (list, dict, set): In-place modification changes the same object → caller sees the change. So it feels like: Immutable → pass by value Mutable → pass by reference But that’s just an illusion. The real rule Python always passes a reference to an object. What you do with that reference determines the outcome. #Python #ProgrammingConcepts #PythonInternals #Mutable #Immutable #CleanCode

⚡ Python Day 2: f-strings = Formatted Superpowers! Just learned how f-strings make Python string formatting elegant and powerful: ✨ What I can now do: • Embed variables directly: `f"Hello, {name}!"` • Perform math in strings: `f"Total: ${price * quantity:.2f}"` • Debug easily: `f"{variable=}"` shows name AND value • Format numbers professionally: `f"${amount:,.2f}"` Key takeaway: f-strings are readable, fast, and eliminate messy concatenation. #Python #Day2 #FStrings #Programming #CodingChallenge #LearnToCode

🚀 The `__all__` Variable in Modules and Packages (Python) The `__all__` variable is a list of strings defining the public names of a module or package. When `from module import *` is used, only the names listed in `__all__` are imported. If `__all__` is not defined, all names that do not begin with an underscore are imported. It provides explicit control over the module's public API. Learn more on our website: https://techielearns.com #Python #PythonDev #DataScience #WebDev #professional #career #development

🚀 Conditional Statements: if, elif, else (Python) Conditional statements allow you to execute different blocks of code based on certain conditions. The `if` statement executes a block of code if a condition is true. The `elif` statement (short for 'else if') allows you to check multiple conditions. The `else` statement executes a block of code if none of the preceding conditions are true. This control flow is essential for creating dynamic and responsive programs. Learn more on our website: https://techielearns.com #Python #PythonDev #DataScience #WebDev #professional #career #development