Making pretty generated SVGs in Python
I am giving a talk at PyconAU 2019 showng how to build SVG and using generative art as a motivator.
This is where I'm puytting all my code so people can have a look, have a play and maybe even give advice (particularly on dumb if statements when I should be using clever maths).
Everything is available to steal and play with . Please share alike.
Hi,
thanks for your programs. They are fun and interesting.
I noted some small problems:
a_bit_mondrian.py
Running it in python 3 gives an error in the random.choice function because colors is an iterable and not a list.
By changing line 14 to:
colors = list(color_nums.keys())
the problem is resolved.
double_pendulum.py
1- the PATH directive is not terminated properly which gives an XML error.
to correct simply change line 116 from:
path+= '" style="fill-opacity: 0; stroke-width: 2; stroke: green; filter: url(#glow);"'
to
path+= '" style="fill-opacity: 0; stroke-width: 2; stroke: green; filter: url(#glow);" />'
2- the filter is not applied because the tags in the filter definition are in lowercase instead of camelcase:
fegaussianblur must be change to feGaussianBlur
stddeviation to stdDeviation
femerge to feMerge
femergenode to feMergeNode
Funny thing, the lowercase tags works in a Jupyter notebook.
Speaking of Jupyter notebook, I put all your programs in a single Jupyter notebook to facilitate experimentation.
I included the notebook and a sample pdf file in the attached files.
python 'a_bit_mondrian.py'
<svg viewBox="0 0 500 500" xmlns="http://www.w3.org/2000/svg">
Traceback (most recent call last):
File "a_bit_mondrian.py", line 37, in <module>
draw_mondrian(500, 500, COLORNUMS)
File "a_bit_mondrian.py", line 18, in draw_mondrian
col = random.choice(colors)
File "/usr/lib/python3.6/random.py", line 261, in choice
return seq[i]
TypeError: 'dict_keys' object does not support indexing
Hi Amanda,
I think the issue you had with this might be a simple fix...
line 29
n = random.randint(0,4) should be=> n = random.randint(0,3)
I've been playing around with your SVG ideas this week, I might have a fun little app (all Python) to share with you.
Pete
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