emsarray plotting error

[Dinga1990]

I'm trying to plot using emsarray and getting the following issue. I have update my libraries and now I'm not sure why this is occuring. I can use other plotting without any issues. I was following https://github.com/csiro-coasts/emsarray-notebooks/blob/master/plot.ipynb

Input Code:

import emsarray
from matplotlib import pyplot as plt
plt.rcParams['figure.dpi'] = 100
plt.rcParams['figure.figsize'] = (8, 5)
plt.rcParams['savefig.dpi'] = 100
gbr4 = emsarray.tutorial.open_dataset('gbr4')
gbr4.ems.plot('botz', title='Depth of sea-bed')

Error received.

**AttributeError**
Traceback (most recent call last)
File ~\anaconda3\lib\site-packages\IPython\core\formatters.py:338, in BaseFormatter.__call__(self, obj)
    336     pass
    337 else:
--> 338     return printer(obj)
    339 # Finally look for special method names
    340 method = get_real_method(obj, self.print_method)

File ~\anaconda3\lib\site-packages\IPython\core\pylabtools.py:152, in print_figure(fig, fmt, bbox_inches, base64, **kwargs)
    149     from matplotlib.backend_bases import FigureCanvasBase
    150     FigureCanvasBase(fig)
--> 152 fig.canvas.print_figure(bytes_io, **kw)
    153 data = bytes_io.getvalue()
    154 if fmt == 'svg':

File ~\AppData\Roaming\Python\Python310\site-packages\matplotlib\backend_bases.py:2346, in FigureCanvasBase.print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, bbox_inches, pad_inches, bbox_extra_artists, backend, **kwargs)
   2344 if bbox_inches:
   2345     if bbox_inches == "tight":
-> 2346         bbox_inches = self.figure.get_tightbbox(
   2347             renderer, bbox_extra_artists=bbox_extra_artists)
   2348         if pad_inches is None:
   2349             pad_inches = rcParams['savefig.pad_inches']

File ~\AppData\Roaming\Python\Python310\site-packages\matplotlib\figure.py:1776, in FigureBase.get_tightbbox(self, renderer, bbox_extra_artists)
   1773     artists = bbox_extra_artists
   1775 for a in artists:
-> 1776     bbox = a.get_tightbbox(renderer)
   1777     if bbox is not None:
   1778         bb.append(bbox)

File ~\AppData\Roaming\Python\Python310\site-packages\matplotlib\artist.py:367, in Artist.get_tightbbox(self, renderer)
    352 def get_tightbbox(self, renderer=None):
    353     """
    354     Like `.Artist.get_window_extent`, but includes any clipping.
    355 
   (...)
    365         The enclosing bounding box (in figure pixel coordinates).
    366     """
--> 367     bbox = self.get_window_extent(renderer)
    368     if self.get_clip_on():
    369         clip_box = self.get_clip_box()

File ~\AppData\Roaming\Python\Python310\site-packages\matplotlib\text.py:943, in Text.get_window_extent(self, renderer, dpi)
    941     return Bbox.unit()
    942 if dpi is None:
--> 943     dpi = self.figure.dpi
    944 if self.get_text() == '':
    945     with cbook._setattr_cm(self.figure, dpi=dpi):

**AttributeError:** 'NoneType' object has no attribute 'dpi'

<Figure size 800x500 with 2 Axes>

[mx-moth]

I can reproduce this locally by installing the latest versions of everything and running in jupyter lab.

$ conda install -c conda-forge emsarray jupyter-lab ipympl

I replaced the ds.ems.plot() code with the actual implementation of the functions and found the issue is with the grid lines. I have not yet worked out a suitable fix, work around, or replacement for the problem bit of code though.

%matplotlib ipympl

import emsarray
import numpy
from matplotlib import pyplot as plt

ds = emsarray.tutorial.open_dataset('gbr4')

figure = plt.figure(figsize=(8, 6), dpi=100)
axes = figure.add_subplot(projection=ds.ems.data_crs)
axes.set_aspect(aspect='equal', adjustable='datalim')
axes.set(title="botz")

axes.add_collection(ds.ems.make_poly_collection(ds['botz'], cmap='jet', edgecolor='face'))

gridlines = axes.gridlines(draw_labels=["bottom", "left"], auto_update=True)

axes.autoscale()

Either setting auto_update=False or removing the draw_labels line will fix the issue and allow the plot to render. However removing auto_update=True causes the grid lines to be misaligned, and having labels on the axes is desired.

[mx-moth]

This issue and specifically this comment seems relevant: SciTools/cartopy#1541 (comment)

[mx-moth]

This issue is resolved in more recent versions of emsarray (see csiro-coasts/emsarray#137) and cartopy (see SciTools/cartopy#2246).