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 plotly/plotly.py#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 mpld3/mplexporter@2f766e4...be8e3da

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 4617a12 !

[tobiz]

As of 20220527 I still get this problem ('XAxis' object has no attribute '_gridOnMajor') with the example of dmiller7115 running kubuntu 21.10, python 3.9.7, matplotlib 3.5.2, plotly 5.8.0 - all python modules standard install. However the only difference is the line in issue is line 247, ie "if axis._gridOnMajor and len(gridlines) > 0:"

[vladh]

@tobiz Line 247 of what file? Doing an ack "_gridOnMajor" gives me nothing, hmm…

[tobiz]

Sorry!
This where it's installed in the VM; similar to the file ref in dmiller7115's install.
/usr/lib/python3/dist-packages/plotly/matplotlylib/mplexporter/utils.py

[vladh]

@tobiz It sounds like your problem is not with mpld3 but with "matplotlylib" — I'm not sure what that is, but it sounds like you have the wrong repo! :P

[bryevdv]

wrong repo

Certainly but in the spirit of helpfulness it is probably worth mentioning the obvious conclusion, which is that the other project has vendored an old / out of date version of mpld3/mplexporter