Dating : Lazy evaluation is computer programming jargon that refers to

If we don’t use list comprehension, we can use a for loop to iterate the range object and append the square to the list object. In the end, both lists have the same items. However, list comprehension is apparently a more concise way to create list objects and should be the preferred way to create a list object if we start with an iterable.We’re not done. There is still so much work to do, and there will always be, and that has always been true. Today, I’m considering our future, not just mine. As Taylor Crumpton writes in the Washington Post: Will you consider me too?Virtual environments are a way that we can create isolated workspaces for our projects such that they can have different Python versions and distinct dependency requirements.
One of the cool Python features is the comprehension technique. Even for beginners, list comprehension is probably one of the advanced techniques that they’ve heard of. The purpose of using list comprehension is to create a list object using an iterable in a very concise way. As a matter of fact, I used the list comprehension in the previous section to create this list of squares:
String interpolation is known as the f-string in Python, which is a more readable way to create formatted strings by having the relevant variable/expression next to the applicable formatting settings.
Five Things is a weekly essay of five short thoughts inspired by my own life and observances. Here are five things I’ve considered since Joe Biden was elected President of the United States of America.
For one example, we can have lazy attributes for our custom class instances. The following code shows you how we can use the property decorator to realize this functionality (please feel free to explore the @cached_property decorator in the functools module for a similar effect):For another example, generators in Python also take advantage of the lazy evaluation technique. As you may know, generators are a special kind of iterator that render elements when they’re requested. Unlike some common iterators created from lists and dictionaries, generators don’t have all of their elements loaded in the memory, and thus they’re very memory-efficient. It’s all because they hold the state of the iteration and “lazily” render the next applicable item. The following code shows you related usage of generators:Compared to the list counterpart, the generator has only a tiny fraction of the size that the list occupies (96 bytes vs. 9,000 bytes). However, both achieve the same effect — the sums of both are equal.

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In the initialization method (i.e. __init__), we set the protected attribute (_profile_data) to be None, which simply serves as a placeholder. In many cases, we don’t really need the profile data.

I’ve had enough, and my life has only just begun. Every four years, the Democratic Party looks to me and countless Black women to save it. Our White women counterparts aren’t held to the same standard, especially not the 53 percent of them who voted for Trump in 2016. White women are granted forgiveness for their “infidelity,” and wooed all over again each election, while Black women are expected to remain loyal and faithful.

The open secret Jennings filled me in on is that OpenStreetMap (OSM) is now at the center of an unholy alliance of the world’s largest and wealthiest technology companies. The most valuable companies in the world are treating OSM as critical infrastructure for some of the most-used software ever written.

The first time I spoke with Jennings Anderson, I couldn’t believe what he was telling me. I mean that genuinely — I did not believe him. He was a little incredulous about it himself. I felt like he was sharing an important secret with me that the world didn’t yet know.

Lazy evaluation is a programming technique that allows our program to delay the expensive operations (e.g. a web request, a computationally heavy calculation) as much as possible.

Special thanks to Jennings Anderson who looked over an early draft of this post and helped me refine it. Also, as usual, the views expressed herein do not represent those of my parents, my wife, my dentist, or my employer.The four companies in the inner circle — Facebook, Apple, Amazon, and Microsoft — have a combined market capitalization of over six trillion dollars.¹ In almost every other setting, they are mortal enemies fighting expensive digital wars of attrition. Yet they now find themselves eagerly investing in and collaborating on OSM at an unprecedented scale (more on the scale later).However, if we do need to get the profile data, we can wrap it around a property decorator. It will check if the _profile_data is None or not, and it will only run the expensive web request when we don’t have data for the _profile_data attribute.
Writing a poem about babies, houses, forests, fruit, Kate Bush, and the woman with the smallest yard I’ve ever seen, tending to her grass, smiling at her neighbors, and talking to the dogs in the next lawn over. When she saw me, she gave me a thumbs up and mouthed, “We won!” That’s how I found out. That’s where I was standing when I felt a small, and mighty wave of relief. That’s when I let myself imagine.
What likely started as a conversation in a British pub between grad students in 2004 has spiraled out of control into an invaluable, strategic, voluntarily-maintained data asset the wealthiest companies in the world can’t afford to replicate.
Lazy evaluation is a programming technique that allows our program to delay the expensive operations (e.g. a web request, a computationally heavy calculation) as much as possible.
I’ve had enough, and my life has only just begun. Every four years, the Democratic Party looks to me and countless Black women to save it. Our White women counterparts aren’t held to the same standard, especially not the 53 percent of them who voted for Trump in 2016. White women are granted forgiveness for their “infidelity,” and wooed all over again each election, while Black women are expected to remain loyal and faithful.