"colour.plotting.multi_spd_plot()" definition fails with AttributeError: "MultiSpectralPowerDistribution.__iter__" object has been removed from the API.

[robbuckley]

Colour version 0.3.11
Python version 3.7.0
NumPy 1.15.1
SciPy -- not imported

code snippet to repo is something like this:

In [1]: from pathlib import Path

In [2]: import colour.plotting
/anaconda3/envs/notebook-general/lib/python3.7/site-packages/colour/utilities/verbose.py:141: ColourWarning: "x" independent variable is not uniform, unpredictable results may occur!
  warn(*args, **kwargs)

In [3]: import colour

In [4]: import pandas as pd

In [5]: LED_data = pd.read_excel(Path('./data/180618_LE RTB N7WM_Spectral-Curves
   ...: .xlsx'), index_col=0)

In [6]: LED_spectra = colour.MultiSpectralPowerDistribution(LED_data)

In [7]: colour.plotting.multi_spd_plot(LED_spectra)
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-7-74b07d9e18dd> in <module>()
----> 1 colour.plotting.multi_spd_plot(LED_spectra)

/anaconda3/envs/notebook-general/lib/python3.7/site-packages/colour/plotting/colorimetry.py in multi_spd_plot(spds, cmfs, use_spds_colours, normalise_spds_colours, **kwargs)
    228 
    229     x_limit_min, x_limit_max, y_limit_min, y_limit_max = [], [], [], []
--> 230     for spd in spds:
    231         wavelengths, values = spd.wavelengths, spd.values
    232 

/anaconda3/envs/notebook-general/lib/python3.7/site-packages/colour/colorimetry/spectrum.py in __iter__(self)
   2362         # Docstrings are omitted for documentation purposes.
   2363         raise AttributeError(
-> 2364             str(Removed('MultiSpectralPowerDistribution.__iter__')))
   2365 
   2366     def get(self):

AttributeError: "MultiSpectralPowerDistribution.__iter__" object has been removed from the API.

[KelSolaar]

Hi @robbuckley,

This is because colour.plotting.multi_spd_plot expect an iterable as input, try that:

colour.plotting.multi_spd_plot([LED_spectra])

or

colour.plotting.single_spd_plot(LED_spectra)

[KelSolaar]

Hi @robbuckley,

I just saw your message on Gitter, I now understand the issue and see that I missed the fact you were using a MultiSpectralPowerDistribution.

There is indeed no way to do that at the moment! I will create an enhancement ticket for it though.

[KelSolaar]

This should be working now!