pycairo

I have been using the graph-tool library for a while now, thus far I hadn't really been using most of its drawing features. Today when trying to use graph_tool.draw.graph_draw I realised that I had configured graph-tool initially without cairo , ./configure --disable-cairo and this is exactly the graphics library that graph_draw uses. If I install cairo now, is there a way to activate the features of graph_tool that rely on cairo without having to remove and reinstall the whole graph_tool module? This would spare a few hours of re-installation. (the make process takes about 3 hours on my

I have generated some charts in d3.js. I use the following code to calculate the values to put in my y axis which works like a charm. var s = d3.scale.linear().domain([minValue, maxValue]); var ticks = s.nice().ticks(numberOfPoints); However I now have to write python code using pycairo which generates clones of the d3.js charts on the server side. My question is does anybody know the logic used in the above code, or something that can give similar results, so that I can replicate it in python to get nice values to use in my y axis? Lars Kotthoff D3 is open source, so you can look up the

I am just getting started using pycairo, and I ran into the following interesting error. The program I write creates a simple gtk window, draws a rectangle on it, and then has a callback to draw a random line on any kind of keyboard input. However, it seems that with each keyboard input, I have to create a new context, or I get an error at the moment the program receives first keyboard input (specifically, on the .stroke() line). Error is as follows, if it matters. 'BadDrawable (invalid Pixmap or Window parameter)'. (Details: serial 230 error_code 9 request_code 53 minor_code 0) #! /usr/bin

Trying to get this code working: import cairosvg import os path = "D:/PyProjects/Bla/Temp" os.chdir(path) cairosvg.svg2pdf(url='Pic.svg', write_to='image.pdf') but get errors along similar to this post : Traceback (most recent call last): File "D:/work/lean_python/pdf/other.py", line 2, in <module> import cairosvg File "D:\env_python352\lib\site-packages\cairosvg\__init__.py", line 29, in <module> from . import surface File "D:\env_python352\lib\site-packages\cairosvg\surface.py", line 24, in <module> import cairocffi as cairo File "D:\env_python352\lib\site-packages\cairocffi\__init__.py",

I want to generate a dynamically created png image with Pycairo and serve it usign Django. I read this: Serve a dynamically generated image with Django . Is there a way to transport data from Pycairo surface directly into HTTP response? I'm doing this for now: data = surface.to_rgba() im = Image.frombuffer ("RGBA", (width, height), data, "raw", "RGBA", 0,1) response = HttpResponse(mimetype="image/png") im.save(response, "PNG") return response But it actually doesn't work because there isn't a to_rgba call (this call I found using Google code but doesn't work). EDIT: The to_rgba can be replaced