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Description
Functional Programming In PythonPython is not a functional programming language, but it is a multi paradigm language that makes functional programming easy to perform, and easy to mix with other programming styles. In this paper, David Mertz, a director of Python Software Foundation, examines the functional aspects of the language and points out which options work well and which ones you should generally decline. Mertz describes ways to avoid Pythons imperative style flow control,
Python is not a functional programming language, but it is a multi-paradigm language that makes functional programming easy to perform, and easy to mix with other programming styles. In this paper, David Mertz, a director of Python Software Foundation, examines the functional aspects of the language and points out which options work well and which ones you should generally decline.Mertz describes ways to avoid Python’s imperative-style flow control, the nuances of callable functions, how to work lazily with iterators, and the use of higher-order functions. He also lists several third-party Python libraries useful for functional programming.'-webkit-tap-highlight-color: transparent; color: rgb(102, 102, 102); font-family: "Open Sans"; font-size: 13px; margin-top: 0px; margin-bottom: 0px; padding: 6px 0px; background-color: rgb(255, 255, 255);'Topics include: Using encapsulation and other means to describe “what” a data collection consists of, rather than “how” to construct a data collection Creating callables with named functions, lambdas, closures, methods of classes, and multiple dispatch Using Python’s iterator protocol to accomplish the same effect as a lazy data structure Creating higher-order functions that take functions as arguments and/or produce a function as a result. David Mertz is a director of the PSF,and chair of its Trademarks Committee and Outreach & Education Committee. He wrote the columns Charming Python and XML Matters for IBM developerWorks and the Addison-Wesley book Text Processing in Python, has spoken at multiple OSCONs and PyCons, and was invited to be a keynote speaker at PyCon India, PyCon UK, PyCon ZA, and PyCon Belaru.Shipping Notes
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4.5 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
EXCELLENT CHOICE
Color: Phoenix at a Bloody Mary Bar V1
My third pair! Fit is amazing! Lightweight, lots of colors to choose from and great sun protection!
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Reviewed in the United States on May 1, 2026
★★★★★ 5
Comfy, nonslip with nice lenses!
Color: Iced By Yetis V2
I have several pairs of Goodr glasses, and so I picked up yet another pair in this nice color combo of white and blue reflective lenses.
The order said "v2", but I couldn't find much difference. I think there is an upgrade on the material or hinge? I guess it might feel a little more comfy on my face, but I had chalked that up to just being a new pair and not my old worn down pair that I wear daily.
The size of the mediums (OG) is perfect for the average size face. You can even "try on" the glasses on the Goodr website if you aren't sure, but the measurements are a pretty good indicator if you need the regulars or need to change size.
Goodr lenses are quality, and have great sun protection, especially with their reflective lenses. The only Goodrs I haven't liked too much are the more "clear" lenses where you can see your eyes clearly through the lenses from the front, but that is just a preference choice, and they have so many options.
I'll probably look at picking up another color combo soon. I have about 5 pairs of the "OG" glasses, and they have all been great and super durable. The only thing I have noticed is the frames pickup a lot of grease from my face, especially if I wear sunblock, but I just wipe them down before and after use, and they seem to last forever.
I also really like the little carrying case they give you, it doubles as a microfiber cloth. If you want more protection, the box it ships in is a sturdy little cardboard slider box that works very well for protection and storage.
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Reviewed in the United States on May 6, 2026
★★★★★ 4
High quality frames with weak polarization
I really like the look and feel of these glasses—they seem to be high quality. I like the fit and the non-slip texture of the frames.
Two things detract from otherwise being exactly what I was looking for.
First, and most importantly, the polarization seems less strong than what I’ve had in other sunglasses. Glare from shiny things like glass on cars and glare on my phone screen seems barely reduced compared to looking without the glasses (tilting my head makes barely any difference in the polarization). I’ve noticed that especially while driving. So I’m taking off one star for that.
Another thing that is more just a personal preference is that the brown lenses are less to my liking than I expected. They really give a strong brown/sepia cast to the world compared to the gray lenses I’ve predominantly used in the past. It reminds me a bit of the light on a day with strong wildfire smoke in the air. I wish they offered these same frames but with gray lenses so that this effect wasn’t so pronounced. No stars removed for this since it’s more of a personal preference, but thought I would point it out for anyone who might be more used to gray/natural lenses without realizing it like I was.
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Reviewed in the United States on January 27, 2026
★★★★★ 5
GREAT PURCHASE!! Perfect for the beach!
Color: Blue, Size: 7x7 FT (1～3 person)
The perfect beach blanket! I recently purchased this for a trip to Amelia Island in Florida. It did exactly what it was supposed to. Waterproof and sandproof! It even held up in the heat really well. The sand got super hot, but the blanket didn't. Thouroghly pleased! Easy to pack back up, and super light and compact.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Great lightweight beach blanket
Color: Blue, Size: 7x7 FT (1～3 person)
This is a great beach blanket, very well designed. Really lightweight, durable, quick drying, easy to use, packs very small. Stakes are included, but we never use them since the corner pockets filled with sand are sufficient to hold the blanket in place. Folding instructions are also provided, but you can just stuff quickly the blanket into the attached pouch, and the overall fine wrinkles are not an issue -- the blanket still looks very nice. The blanket is very thin, so there's no extra "padding" (this is what keeps it super lightweight and quick drying), but it works great on soft sand, so it's perfect for our use. (This is the first one I've bought, but we've used my son's for years.)
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Reviewed in the United States on March 16, 2026
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