Reuven (@Reuven@fosstodon.org)
Gold prices have gone up recently — but by how much?
In the latest Bamboo Weekly, we use #Python and #Pandas to find out. Then we compare its price with silver, and with central banks' gold and dollar holdings.
Get data analysis puzzles every Wednesday: https://BambooWeekly.com
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blotosmetek (@blotosmetek@circumstances.run)
Unsolicited Programming Suggestion (UPS)¹:
When you code a condition for executing some action every N days, think what should happen if your system is down at the time of scheduled execution. For example, this #Python example code:
if current_day == previous_day + N:
action()
previous_day = current_day
will fail miserably – your action will not happen ever again. Replacing == with >= will solve the problem – assuming you want your action to be executed as soon as possible if the scheduled time was missed. If, however, your preferred solution is to skip the missed event altogether, but execute the next event at correct time, the % (modulo) operator is your friend:
if current_day % N == 0:
action()
Of course, this holds for intervals expressed in any units, not just days, you just need to calculate your current_whatever accordingly – for example, current_hour = int(time.time()) // 3600 or current_week = int(time.time()) // (7*24*3600) .
Now you may ask "What about cron, isn't it its role to handle such things?"
Well, yes, but cron doesn't allow you to specify, for example, "every other week", and if you think this crontab entry: 0 12 */9 * * something will run something at noon every 9th day, you're in for a surprise, and you haven't read man 5 crontab carefully – at least on Debian it says:
# Run once every 9th day, even across week, month, and year boundaries:
33 22 * * * expr $(date +\%s) / 60 / 60 / 24 \% 9 > /dev/null || echo Wax the floor.
Yes, this is what is needed to have your action actually performed on every 9th day rather than on 9th, 18th and 27th day of every month.
¹ I'll probably be posting more such #UPS based on my own or my coworkers' real life experiences…
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lobsters (@lobsters@mastodon.social)
MicroPythonOS - The Ultimate MicroPython Operating System https://lobste.rs/s/zcfnh9 #osdev #python
https://micropythonos.com/
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habr (@habr@zhub.link)
Дескрипторы Python: механизм, на котором держится половина крутости языка
Дескрипторы — одна из тех фич Python, о которых многие слышали, но мало кто использует напрямую. При этом они лежат в основе @property , @classmethod , @staticmethod , слотов и даже обычного доступа к методам. Разберём, что такое дескрипторы, как их писать и когда они реально полезны. Понять механизм
https://habr.com/ru/companies/otus/articles/988864/
#python #дескрипторы_Python #метапрограммирование #внутреннее_устройство_Python #data_descriptor
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reddit_tech_vn_bot (@reddit_tech_vn_bot@mastodon.maobui.com)
MastodonBotVN: ArcadeDB Embedded Python hỗ trợ lưu trữ đa mô hình trong tiến trình (bảng + đồ thị + vector) mà không cần server! Tính năng nổi bật: ACID, HNSW, SQL, OpenCypher và JVM gọn nhẹ. Cài đặt: `pip install arcadedb-embedded`. Thảo luận: Phân tách vector/đồ thị hay tích hợp? #ArcadeDB #Python #AI #ThưVienMới #LocalLLaMA
https://www.reddit.com/r/LocalLLaMA/comments/1qqdiit/embedded_local_memory_for_agents_tables_graph/
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ubuntu_touch (@ubuntu_touch@mstdn.social)
Crear una leyenda con un histograma
#Python #Matplotlib #Gauss #Histograma
#softwarelibre #Anzoategui #Lecheria
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13 (@13@2137.social)
An E-Ink Macropad For Improved Productivity https://hackaday.com/2026/01/29/an-e-ink-macropad-for-improved-productivity/
#PeripheralsHacks #Keyswitches #Macro #Macropad #Python
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tardate (@tardate@ruby.social)
This week's @cassidoo challenge: count vowels and flip words. Using #python this time..
https://codingkata.tardate.com/python/flippedy/
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r (@r@bsky.brid.gy)
📢 #Oferta de #Empleo: Profesor/a de #Python Aula Digital Tech crece y buscamos un/a Profesor/a de Python apasionado/a por la enseñanza y la tecnología 🎯 ¿Qué buscamos? Buscamos a un #profesional con experiencia en Python y vocación docente, capaz de transmitir conocimientos AulaDigitalTech.com 👍
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rogeliop (@rogeliop@techhub.social)
I'll see myself out... grab my coat...
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Reuven (@Reuven@fosstodon.org)
#Python gotcha: Forgetting () on method calls!
d = {'a':2, 'b':4}
list(d.items()) # ✅ calls method
list(d.items) # ❌ passes method object
Result:
Error: 'builtin_function_or_method' object is not iterable
Remember: () calls the method!
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reddit_tech_vn_bot (@reddit_tech_vn_bot@mastodon.maobui.com)
Luyện tập Python, HTML và CSS trên FreeCodeCamp nhưng nhiều bước thất bại khiến mình bế tắc! Mong anh em chia sẻ tài liệu, khóa học hữu ích hoặc sách tham khảo chất lượng. Làm sao để học hiệu quả mà không lo âu? Bức xúc quá! 🛠️ #HọcLậpTrinh #TưVấnLậpTrình #Python #HTML #CSS #CodingHelp #TechCommunity
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