TypeError: 'AxesSubplot' object is not subscriptable

[vredzhepov]

`# Demo 4 - Read part of a WFDB annotation file into a wfdb.Annotation object, and plot the samples
annotation = wfdb.rdann('sample-data/100', 'atr', sampfrom=100000, sampto=110000)
annotation.fs = 360
wfdb.plot_wfdb(annotation=annotation, time_units='minutes')`

`# Can also read the same file hosted on PhysioNet 
annotation2 = wfdb.rdann('100', 'atr', sampfrom=100000, sampto=110000, pn_dir='mitdb')`

TypeError: 'AxesSubplot' object is not subscriptable
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/tmp/ipykernel_226822/286435021.py in <module>
      2 annotation = wfdb.rdann('sample-data/100', 'atr', sampfrom=100000, sampto=110000)
      3 annotation.fs = 360
----> 4 wfdb.plot_wfdb(annotation=annotation, time_units='minutes')
      5 
      6 # Can also read the same file hosted on PhysioNet

.venv/lib/python3.8/site-packages/wfdb/plot/plot.py in plot_wfdb(record, annotation, plot_sym, time_units, title, sig_style, ann_style, ecg_grids, figsize, return_fig)
    640                                                               plot_sym=plot_sym)
    641 
--> 642     return plot_items(signal=signal, ann_samp=ann_samp, ann_sym=ann_sym, fs=fs,
    643                       time_units=time_units, ylabel=ylabel,
    644                       title=(title or record_name),

.venv/lib/python3.8/site-packages/wfdb/plot/plot.py in plot_items(signal, ann_samp, ann_sym, fs, time_units, sig_name, sig_units, xlabel, ylabel, title, sig_style, ann_style, ecg_grids, figsize, sharex, sharey, return_fig, return_fig_axes)
    120 
    121     if ann_samp is not None:
--> 122         plot_annotation(ann_samp, n_annot, ann_sym, signal, n_sig, fs,
    123                         time_units, ann_style, axes)
    124 

.venv/lib/python3.8/site-packages/wfdb/plot/plot.py in plot_annotation(ann_samp, n_annot, ann_sym, signal, n_sig, fs, time_units, ann_style, axes)
    351                                 'the "rdann" function?')
    352 
--> 353             axes[ch].plot(ann_samp[ch] / downsample_factor, y, ann_style[ch])
    354 
    355             # Plot the annotation symbols if any

TypeError: 'AxesSubplot' object is not subscriptable

[bemoody]

Yeah, that's strange. That plot command works when running from the command line (using the Tk backend for matplotlib) but fails when running in jupyter.

No idea why that would be, though I know very little about matplotlib or jupyter.

[vredzhepov]

I've just tried to run the demo from the command line (IPython) and got the same result. Seems the same issue is described here https://stackoverflow.com/questions/52273546/matplotlib-typeerror-axessubplot-object-is-not-subscriptable

[bemoody]

Okay, actually I was wrong, it's not the backend. This bug was already fixed (in pull #308) but not yet released. So we need to do that. :)

[vredzhepov]

You're right I've just tested the demo on the master branch and it works as expected. So the bug presents in the v3.4.0. Are you going to close this issue when the new release will be available?

[vredzhepov]

Fixed in v3.4.1