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If you’ve ever typed import tensorflow as tf inside a Jupyter Notebook and got hit with a ModuleNotFoundError, you’re not alone. This is one of the most common frustrations for beginners getting into machine learning, and it almost always comes down to one thing: TensorFlow was installed in a different environment than the one Jupyter is using. In this … Read more >>
If I need the current UTC in Python, I use datetime.now(timezone.utc) first. It gives me a timezone-aware datetime, which is the safest choice for logs, APIs, databases, and scheduled jobs. What UTC means UTC stands for Coordinated Universal Time. It is the standard time reference I use when I want one consistent clock across servers, apps, and … Read more >>
If you’ve been hearing about Django and want to start building web apps with Python, you’re in the right place. In this guide, I’ll walk you through how to install Django step-by-step — on Windows, Mac, or Linux — from scratch. I’ll also show you how to run your first Django project, install a specific … Read more >>
datetime.now() is how Python hands you the current date and time, in a single object: For the date on its own, date.today() is shorter. To control how it looks, pass a pattern to strftime(). One thing has changed recently and is worth knowing: datetime.utcnow() is deprecated. The replacement is covered below, along with formatting, timezones … Read more >>
If you’ve ever run a Python script and hit this error: NameError: name ‘raw_input’ is not defined — You’re in the right place. That error means you’re using Python 3, and raw_input was removed in Python 3. Don’t worry, though. The fix is simple, and I’ll walk you through everything you need to know in this guide. … Read more >>
If you’ve ever tried to pass a NumPy array into a function that only accepts a tuple, you already know the frustration. The fix is simple, but picking the right method depends on what you’re working with. In this tutorial, I’ll walk you through 5 practical ways to convert an array to a tuple in Python, including … Read more >>
Tuples are everywhere in Python: database query results, function return values, coordinate pairs, and configuration settings. And knowing the right way to loop through them can make your code cleaner, faster, and more Pythonic. To iterate through a tuple in Python, you can use a for loop, a while loop, enumerate(), zip(), list comprehension, or itertools.chain(), each suited for a different scenario. … Read more >>
Every Python developer hits this wall at some point. You have a tuple, you need to add an element to it, and Python throws back a cold AttributeError: ‘tuple’ object has no attribute ‘append’. Frustrating? Absolutely. But it’s fixable, and once you understand why tuples work the way they do, the solution makes complete sense. In this guide, … Read more >>
If you’ve ever returned structured data from a function or tried to group related values cleanly, you’ve probably run into both namedtuple and dataclass. They look similar on the surface; both let you create objects with named fields, but they’re built for different jobs. I get this question a lot in Python training sessions: “When do I use one … Read more >>
If you’ve been writing Python for a while, you’ve probably seen a function return two or three values at once and wondered, “wait, is that a tuple?” Yes, it is. And learning how to return a tuple from a function is one of those small things that make your Python code a lot cleaner. In … Read more >>
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