>>>>> "Fernando" == Fernando Perez <Fer...@co...> writes: Fernando> Quick heads-up: Fernando> Python 2.2 dicts do NOT have a pop() method, this Fernando> appeared in python 2.3. It's fine if you decide to make Fernando> matplotlib fully 2.3-dependent, but I just wanted to Fernando> make you at least aware of this fact. 2.2 is still in Fernando> reasonably wide use in the field, so if you are going to Fernando> drop support for it, you might want to put a big fat Fernando> warning about this fact, just to save users the hassle Fernando> of weird bugs. Ahh, thanks for your vigilance. I do plan to continue to support 2.2 as long as possible, except for the known issues: datetime and mathtext. I reverted all the pops to gets. I also made some enhancements to backend_driver to better work with python2.2 - it now takes the python to run as a parameter and skips tests where 2.2 is already known to fail. Hopefully, I'll remember to be vigilant to test 2.2 before each release. JDH