This is a simple package which can be used to plot the wavelet spectrum, based on the continuous wavelet transform.
> git clone https://github.com/giacomov/mvts.git
> cd mvts
> python setup.py install
(you might need to become root, or alternatively, to add the '--user' option to the last command)
import mvts
results, fig = mvts.wavelet_spectrum()
The results
dictionary will contain the results of the wavelet transform,
while the figure will contain the wavelet spectrum.