lmfit 1.3.0 breaks simpack.FitModel

[dkriegner]

FitModel does not work anymore since its badly implemented. (It does not call super.__init__() for example).

[rugfri]

Hi, I think I still have the issue with lmfit 1.3.0

with
mk = xu.simpack.KinematicalModel(ls_s, energy=en, resolution_width=resol)
fitmkin = xu.simpack.FitModel(mk)
result = fitmkin.fit(ydata, params, qarray, lmfit_kws=dict(hkl=qpoint), hkl=qpoint)

I get the error
raise ValueError(f"'Missing independent variable '{var}'")

which comes from xrayutilities src

--> 268 res = super().fit(data[mask], params, x=x[mask], weights=mweights,
269 fit_kws=fit_kws, iter_cb=cb_func, **lmfit_kws)

I have xrayutilities version 1.7.6 and lmfit 1.3

[dkriegner]

If you test with version 1.7.6 then it can't be fixed. If you want to check if the next (to be released) version will fix the issue you have to install the development version. see here to see how you can do this easiest:
https://sourceforge.net/p/xrayutilities/mailman/message/37188943/

If you can test this before I release the next version this is of course appreciated!