Request: add copy method to FswavedecnResult object #518
Description
A user on the mailing list was asking how to make a copy of the coefficients returned by fswavedec.
It seems reasonable to add a copy method to the FswavedecnResult class to make this easier to do. Note that Python's own deepcopy does not currently work with FswavedecnResult objects either:
File "stringsource", line 2, in pywt._extensions._pywt.Wavelet.__reduce_cython__
TypeError: no default __reduce__ due to non-trivial __cinit__