Mpld3: XAxis' object has no attribute '_gridOnMajor

[dmiller7115]

Hello, matplotlib recently merged a change that removed provide variables from Axis: matplotlib/matplotlib#18769.

I hit this bug when converting matplotlib to html.

• matplotlib>=3.3.3
• mpld3==0.5.1

Reproduce by:

import mpld3
import matplotlib.pyplot as plt
fig = plt.figure(1)
ax = plt.plot([1,2,3])
mpld3.fig_to_html(fig)

Results in

~/venv/lib/python3.7/site-packages/mpld3/mplexporter/utils.py in get_grid_style(axis)
    261 def get_grid_style(axis):
    262     gridlines = axis.get_gridlines()
--> 263     if axis._gridOnMajor and len(gridlines) > 0:
    264         color = export_color(gridlines[0].get_color())
    265         alpha = gridlines[0].get_alpha()

AttributeError: 'XAxis' object has no attribute '_gridOnMajor'

[carlinmack]

There is a fix suggested here https://github.com/plotly/plotly.py/issues/2913

[cliffckerr]

Thank you @dmiller7115 and @carlinmack -- we'll try to get this fixed in the next few days. Main thing to check is that the fix doesn't break anything for previous version of Matplotlib.

[vladh]

Hey everyone, thank you for the report and for the information.

I've fixed this in https://github.com/mpld3/mplexporter/compare/2f766e439b9d91ab4d4682245a2360bc1e5c2bb5...be8e3da62c81fea15a0107f3ae96ba16fc2cc9f

I've confirmed that the fix suggested by @carlinmack works for matplotlib versions 3.3.3, 3.2.1 and 2.2.5.

The fix will be available as soon as I push out the new version, which will be ASAP.

Let me know if you encounter any problems!

[carlinmack]

thanks for testing! I didn't think about backwards compatibility, but glad to hear it works okay!

[vladh]

Fixed in release 0.5.2 in https://github.com/mpld3/mpld3/commit/4617a12d7d0cafd636e66bc65a709e2aab22c0e6 !