Spot an error of mplstereonet while using Google Colab

Hi @joferkington, I just tried the code of basic usage in Google Colab 2 weeks ago and it succeeded, but when I re-try to plot in Google Colab again, I spot an error that I couldn’t solve. It’s related to code: ax = fig.add_subplot(111, projection='stereonet'). The error is as follows:

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-13-5f249805830b> in <module>()
      3 
      4 fig = plt.figure()
----> 5 ax = fig.add_subplot(111, projection='stereonet')
      6 
      7 strike, dip = 315, 30

11 frames
/usr/local/lib/python3.6/dist-packages/mplstereonet/stereonet_transforms.py in transform_non_affine(self, ll)
     69     _inverse_type = 'BaseInvertedTransform'
     70     def transform_non_affine(self, ll):
---> 71         longitude = ll[:, 0:1]
     72         latitude  = ll[:, 1:2]
     73         clong = self._center_longitude

TypeError: tuple indices must be integers or slices, not tuple

I also attached my Colab notebook to you, link here. Is there something wrong or missing in my codes? Looking forward for your help 😃

[joferkington]

As other folks mentioned, this has been fixed in master for quite awhile, but things were long overdue for a release. v0.6 includes fixes for this, among other things, so a default pip install should work now. To upgrade to the current release, you can do either pip install 'mplstereonet==0.6.0' or pip install --upgrade mplstereonet

[robgeotech]

@yohanesnuwara I had the same issue in Jupyter notebook (with Anacondo) after updating versions of Matplotlib (from 3.1.1 to 3.1.2) and Numpy. Updating to the development version of mplstereonet as referenced in another issue (https://github.com/joferkington/mplstereonet/issues/16#issuecomment-275771610) seemed to solve the problem.