[fix] broken FS: np.shape -> len

np.shape behaved behavior for inhomogenous list of lists and crashes in
newer versions

python/solid_dmft/postprocessing/plot_correlated_bands.py

@@ -490,7 +490,7 @@ def get_kx_ky_FS(lower_right, upper_left, origin, Z, tb, select=None, N_kxy=10,
 
     sheet_ct = 0
     for sheet in contours.keys():
-        for sec_per_sheet in range(np.shape(contours[sheet])[0]):
+        for sec_per_sheet in range(len(contours[sheet])):
             # once on 2D cubic mesh
             FS_kx_ky[sheet_ct] = np.vstack([_fract_ind_to_val(kx, contours[sheet][sec_per_sheet][:, 0]),
                                             _fract_ind_to_val(ky, contours[sheet][sec_per_sheet][:, 1]),