Description
When I try to import pyspeckit (using today's 0.1.21.dev2815 version), I get this error:
pyspeckit git:(master) python
Python 3.6.6 |Anaconda custom (64-bit)| (default, Jun 28 2018, 11:07:29)
[GCC 4.2.1 Compatible Clang 4.0.1 (tags/RELEASE_401/final)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import pyspeckit
Traceback (most recent call last):
File "/Users/tsrice/Documents/Code/cloned_projects/pyspeckit/pyspeckit/spectrum/plotters.py", line 18, in <module>
from matplotlib.cbook import BoundMethodProxy
ImportError: cannot import name 'BoundMethodProxy'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Users/tsrice/Documents/Code/cloned_projects/pyspeckit/pyspeckit/__init__.py", line 10, in <module>
from . import spectrum
File "/Users/tsrice/Documents/Code/cloned_projects/pyspeckit/pyspeckit/spectrum/__init__.py", line 3, in <module>
from .classes import Spectrum,Spectra,ObsBlock
File "/Users/tsrice/Documents/Code/cloned_projects/pyspeckit/pyspeckit/spectrum/classes.py", line 26, in <module>
from . import plotters
File "/Users/tsrice/Documents/Code/cloned_projects/pyspeckit/pyspeckit/spectrum/plotters.py", line 20, in <module>
from matplotlib.cbook import _BoundMethodProxy as BoundMethodProxy
ImportError: cannot import name '_BoundMethodProxy'I think this is related to a change in how Matplotlib 3.0 handles callbacks, but I'm not 100% sure:
https://matplotlib.org/api/api_changes.html#callbackregistry-now-stores-callbacks-using-stdlib-s-weakmethods
CallbackRegistry now stores callbacks using stdlib's WeakMethods
In particular, this implies that CallbackRegistry.callbacks[signal] is now a mapping of callback ids to WeakMethods (i.e., they need to be first called with no arguments to retrieve the method itself).