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Lunar Halo (mander.xyz)

It is a bad quality photo taken from a mobile. The circle that surrounds the moon is formed by the refraction of the moonlight when passing through ice crystals present in the atmosphere. At times surrounding the moon itself you can see a circular rainbow (they all are, but we see only half of the solar rainbow). This phenomenon is called a lunar halo.

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Tonight, if the clouds allow me, I wanted to take pictures with my Skywatcher Star Adventurer mini. As I'm going to set up a small telescope (a Celestron C90) I need a very good alignment to the Polar so that I don't have any traces left. Tips to make an alignment as accurate as possible? Thank you

[-] xurxia@mander.xyz 3 points 5 months ago

I think it is an ideal traveling companion... small, light but good enough to enjoy the night sky

[-] xurxia@mander.xyz 3 points 5 months ago

Thanks! I am saving for a 9-10" newtonian with a EQ6 mount

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submitted 5 months ago* (last edited 5 months ago) by xurxia@mander.xyz to c/astrophotography@lemmy.world

My first photo with a telescope. It is not a incredible shoot but I am very proud of it.

Telescope: Celestron C90 Camera: Sony A7R Mk II (APS-C crop mode) Exposition: 1/10"

[-] xurxia@mander.xyz 3 points 6 months ago

Yes, you can. Python has Email package to manage email through STMP protocol. I use it daily in my scripts. Attached link is a tutorial of Real Python:

https://realpython.com/python-send-email/

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submitted 7 months ago by xurxia@mander.xyz to c/python@programming.dev

I have developed a project in #python to follow #RSS feeds and send an email with daily news. It is more an excuse to practice python, git and design patterns than a real project, but feel free to use it if you find it useful. Suggestions, opinions and feedback are welcome.

https://github.com/xurxia/newswave

[-] xurxia@mander.xyz 3 points 8 months ago

Thanks! I will try it. I was an user of this sw but recently I have moved to Pyto as it has more libraries (OpenCV, etc), pip support and a newer Python version. Pythonista has its pros too.

[-] xurxia@mander.xyz 5 points 10 months ago

I find it very interesting and I want to do one with my kids. The guide is good from a step by step point of view about how to make one, but I think a couple of examples about what kind of data can someone get with it and what can someone expect to "view" could be very helpfull too

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submitted 10 months ago by xurxia@mander.xyz to c/mander@mander.xyz

I have just created a new community in Lemmy about Generative AI like GPT or Midjourney. The subjects are diverse: from news to development

[-] xurxia@mander.xyz 15 points 10 months ago* (last edited 10 months ago)

After preview it will be a paid subscription additional to Office365, the same strategy as Office Copilot. I hate this policy of pay for a product then still paid for more functionalities... at the end of the year you will have paid a lot.

Microsoft says Python in Excel will be included in a Microsoft 365 subscription during the preview, but “some functionality will be restricted without a paid license” after the preview ends.

[-] xurxia@mander.xyz 9 points 11 months ago

I fully agree with the post. Except for a fast prototyping or a short personal script where it could be not necessary, type hint is a must. The subject is not only to guarantee that the program now runs without errors, but it will be still working right in the future too, even after a developer (either the original or other) make changes to the code.

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submitted 11 months ago by xurxia@mander.xyz to c/memmy@lemmy.ml

Since the last update, half of the times I open the app I see All posts but in my preferences I have set Subscribed. The rest of the times it woks fine.

I want to thanks one more time to the developers who are making this great app 👏🏻👏🏻👏🏻 I really love it!

[-] xurxia@mander.xyz 8 points 1 year ago

Hi,

I have used goto instruction a lot when I started to program in Basic ( an Amstrad CPC 🥹). In this context goto had logic. But in modern languages like python I think it is a very bad idea:

  • Understand the logic is more complex
  • Functions and methods are a better and more powerfull alternative
  • It is dangerous: add or remove a new line of code could have bad consequences

Regards

[-] xurxia@mander.xyz 2 points 1 year ago* (last edited 1 year ago)

The bug to set NEW as the default sort option for posts in the config menu is still alive

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submitted 1 year ago by xurxia@mander.xyz to c/memmy@lemmy.ml

I have just installed the last version and it comes with some errors:

  • I can't set NEW as default option for sort posts in config
  • I can't see communities wich I am subscripted
  • When I search the communities section is always empty
[-] xurxia@mander.xyz 3 points 1 year ago* (last edited 1 year ago)

You can use global variables, it is true, but I prefer singleton because I have all config variables and logic encapsulated in a class. The first time the singleton object is created it reads all the config variables from a file, and with its methods get and set manages them. The Config class doesn't know the parameters names of the config file neither the number, it dynamically reads the file and creates the attributes, so It is a very reusable code that when you program using OOP is a more natural way than implementing like a module.

Related to this, I group config variables by sections so it is more clearly for me, then the singleton object dynamically creates an array for each section, and a variable into the array for every variable in this section of the config file. Access to the config info is as easy like this:

   conf = Config()
   conf.get('DB', 'server')
   conf.get('DB', 'login')
   conf.get('DB', 'password')
[-] xurxia@mander.xyz 8 points 1 year ago* (last edited 1 year ago)

I use a singleton class called Config (some times I use it as a Cache too)

Singleton pattern: https://www.geeksforgeeks.org/singleton-pattern-in-python-a-complete-guide/

Config class using Singleton pattern: https://charlesreid1.github.io/a-singleton-configuration-class-in-python.html

[-] xurxia@mander.xyz 2 points 1 year ago* (last edited 1 year ago)

Hi! Other great book is "Fluent Python". I think PCC could be better as first contact and then this one as next step.

https://www.oreilly.com/library/view/fluent-python/9781491946237/

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submitted 1 year ago by xurxia@mander.xyz to c/main@mander.xyz

I introduce myself: I am Galician and citizen of the World. Proud father. I love science (specially astronomy), technology, nature and photography. I play padel and surf and whenever I can I escape with my camper van.

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xurxia

joined 1 year ago
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