Python completely barebones graphics - python

I am looking for a program or simply documentation (if it's part of windows) of a library where you can edit an image directly, push it to the screen, and nothing else. Basically what could be a framework for a graphics library, but not giving any aid in terms of drawing things.

Pillow is a fork of the Python Imaging Library (PIL). Find its official docs here, and the very handy chapter on it in Automate the Boring Stuff With Python.
If you have specific needs as to what you mean by editing, please elaborate if I've missed the mark.

I would suggest looking into the PPM image filetype. This filetype, when provided a header, allows you to simply output "0 0 0" or any other values for one pixel. You print how many of these you want in your rows and columns, and it'll construct an image for you. This filetype is especially helpful in quickly implementing graphical representations of solutions
Refer to http://netpbm.sourceforge.net/doc/ppm.html for a quick guide!

Related

Where can I find the GIMP Python Object References, I'm currently looking for the properties of Vectors and Points

I'm trying to write a script in GIMP Python and cannot seem to find any online docs regarding the GIMP Python Objects such as images, layers, paths, vectors, strokes, ect.
I've looked around developer.gimp.org and the good old google but cannot seem to find anything.
I've also tried the looking at the GIMP installation files, I followed the gimpfu.py and found the object mapping of PF_VECTORS to gimp.Vectors but this takes me to a gimp.pyd file which I cannot view.
Any tips would be much appreciated, thank you.
The Gimp python doc is here. Not complete but a good start.
Beside this, most methods (there are some that are not in the doc, use dir() on an instance of the class) are just straightforward adaptations of the PDB functions.
All I known about path/vectors in Gimp has been found/inferred by doing a dir() on vectors in the Python console. There isn't that much going on, it's a fairly straightforward application of Bézier curves.
Some basics on Paths can be found here.
If you want sample code for Gimp python scripts dealing with paths see here.
If you have specific questions ask here on SO with a gimp tag or in the forum above (same person, actually:))

Adding text to a 'paragraph' containing an image using python docx

I'm using python docx which claims in the documentation that:
'Often, a picture is placed in a paragraph by itself, but this is not required. It can have text before and after it in the paragraph in which it’s placed.'
But I cant find out how to do this, could someone explain (idealy with a basic example) how I get text before the image while in the same paragraph please. So the line of text ends with an image.
I've not found any answers to this but have seen people asking the same elsewhere with no solution.
Thanks
(note: I'm not a hugely experiance programmer and other than this awkward part the rest of my code will very basic)
At the time of this writing, python-docx doesn't have the features to support what you're trying to do.
The feature that would support it would be Run.add_picture(). If you add a feature request to the python-docx issue tracker, I'll see how soon we can get to it.
In the meantime, if you wanted to dig in and see what you could hack up, I'd recommend starting here, at Document.add_picture, as the structure would be analogous and use mostly the same calls.
If you just want to write docx files with Python, you can use another module:
https://github.com/rafaels88/py2docx

Sublime Text editor plug-in, scan div id's and classes

I'm aware I'm supposed to show some starting code to give you a clue as to what I'm trying to do, but I'm really at a basic level and I can't find any resources to show me what I'm after. Basically, I'm trying to write a plug-in for Sublime Text editor, which selects all div ID's then outputs them into a file. What's the best approach? It seems like it should be easy, but I'm not too sure.
Thanks in advance for your help,
Ewan
This looks like a good place to start: http://www.sublimetext.com/docs/plugin-basics
Look at http://www.sublimetext.com/docs/2/api_reference.html, though be advised that Sublime Text 3 is currently in beta. It introduces changes to the plugin api, and a requirement to support Python 3. See http://www.sublimetext.com/docs/3/porting_guide.html
Assuming you have some familiarity with python, I would start with this tutorial on for writing plugins (Link). The author of that tutorial wrote, among other things, package control. Granted, it is for ST2, but for what you are trying to do, I don't for see any major issues with writing a plugin that is compatible with both ST2 and ST3.
How you go about writing your particular plugin is up to you. One approach may be leveraging the view.find_all() method. This takes a regular expression and returns a set of regions. From these regions, you can grab the text, and subsequently the IDs for the divs. There may be a better way, but that might work as an initial attempt. Writing to a file can be done through the usual python means.

is there a simple portable way to read a gif image using python (no PIL)?

I am using python inside another application (CINEMA 4D) create a nice connection to out issue tracker (Jira) inside the application. Rationale behind this is to make it really easy for our plugin users to report and track bugs and have things like machine specs, screenshots or attaching scene files (including textures) automatically.
So far it as been a really smooth ride and the integration is coming along great. I started grabbing the icons for issue priorities, projects, issue types, etc. from Jira as well so they can be displayed for better overview. To read the image files I am using CINEMA 4D functionality that is available inside its python binding.
The problem now is, that most icons from Jira come in GIF format and the CINEMA 4D SDK doesn't read GIF files directly (actually it does read them, but only through a back door so users can load them, but I can't use that functionality through Python or the SDK). So I need another way to read the GIF files.
There are a few questions on stackoverflow that go into this direction, but they all seem to recommend PIL. This doesn't feel like the right solution for a few reasons:
While that looks nice, it's not part of the standard distribution and seems to be really only maintained for Windows (even though there are builds for Mac OS X).
It also seems to install itself into the current system installation of Python, but CINEMA 4D comes with its own, so I'd have to rip it apart and distribute it with my plugin.
And then it is quite large, while I really only want a compact script to have a compact solution (preferably out of the box, but that doesn't seem to be an option)
I was wondering if there is a simpler or at least more compact way. Since GIF seems to be a relatively simple file format, I am wondering if there may even be a simple parser as a python function/class.
I found a link where somebody disassembles a gif files embedded frames, but doesn't actually grab the image contents: Python, how i can get gif frames
I'm fine with putting in some time on my own, and I would've already been coding away if the file format was something uncompressed, but I am a little reluctant since the compression seems to raise the bar slightly.

Does one often use libraries outside the standard ones?

I am trying to learn Python and referencing the documentation for the standard Python library from the Python website, and I was wondering if this was really the only library and documentation I will need or is there more? I do not plan to program advanced 3d graphics or anything advanced at the moment.
Edit:
Thanks very much for the responses, they were very useful. My problem is where to start on a script I have been thinking of. I want to write a script that converts images into a web format but I am not completely sure where to begin. Thanks for any more help you can provide.
For the basics, yes, the standard Python library is probably all you'll need. But as you continue programming in Python, eventually you will need some other library for some task -- for instance, I recently needed to generate a tone at a specific, but differing, frequency for an application, and pyAudiere did the job just right.
A lot of the other libraries out there generate their documentation differently from the core Python style -- it's just visually different, the content is the same. Some only have docstrings, and you'll be best off reading them in a console, perhaps.
Regardless of how the other documentation is generated, get used to looking through the Python APIs to find the functions/classes/methods you need. When the time comes for you to use non-core libraries, you'll know what you want to do, but you'll have to find how to do it.
For the future, it wouldn't hurt to be familiar with C, either. There's a number of Python libraries that are actually just wrappers around C libraries, and the documentation for the Python libraries is just the same as the documentation for the C libraries. PyOpenGL comes to mind, but it's been a while since I've personally used it.
As others have said, it depends on what you're into. The package index at http://pypi.python.org/pypi/ has categories and summaries that are helpful in seeing what other libraries are available for different purposes. (Select "Browse packages" on the left to see the categories.)
One very common library, that should also fit your current needs, is the Python Image Library (PIL).
Note: the latest version is still in beta, and available only at Effbot site.
If you're just beginning, all you'll need to know is the stuff you can get from the Python website. Failing that a quick Google is the fastest way to get (most) Python answers these days.
As you develop your skills and become more advanced, you'll start looking for more exciting things to do, at which point you'll naturally start coming across other libraries (for example, pygame) that you can use for your more advanced projects.
It's very hard to answer this without knowing what you're planning on using Python for. I recommend Dive Into Python as a useful resource for learning Python.
In terms of popular third party frameworks, for web applications there's the Django framework and associated documentation, network stuff there's Twisted ... the list goes on. It really depends on what you're hoping to do!
Assuming that the standard library doesn't provide what we need and we don't have the time, or the knowledge, to implement the code we reuse 3rd party libraries.
This is a common attitude regardless of the programming language.
If there's a chance that someone else ever wanted to do what you want to do, there's a chance that someone created a library for it. A few minutes Googling something like "python image library" will find you what you need, or let you know that someone hasn't created a library for your purposes.

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