I thought I had sent this code on Sunday, but apparently it didn't make it to the list. Apologies if it arrives twice.
This code was contributed by Rob Knight, from the biochemistry dept. at CU Boulder, to draw nice arrows with a lot of control.
You can see an example here (just paste the example data):
Both a CGI and a command line demo are attached, as well as the underlying arrow-drawing code. It would be great if this could be integrated into mpl for the future.
arrow_cgi.py (3.06 KB)
arrow_plot.py (8.8 KB)
fancy_arrow.py (2.82 KB)