Main IO routines

[phockett]

Possibly ongoing issues with checkDims() and subselectDims() and Xarray assumptions/versions causing main IO routines to break.

• Just fixed bug in 5cfb04f, arose due to changes in refDims (see

  ePSproc/epsproc/util/misc.py

  Line 286 in 5cfb04f

  # 21/07/22 - actually this breaks main file IO for singleton items to xr.sel() for MultiIndex cases (see subselectDims() below).

  ).
  • This may, however, break new codes! May need to change to an optional flag, or additional output.
  • UPDATE: now reinstated and fixed with .copy() in dc91f32.
• General rethink/tidy-up of old IO routines is worthwhile at some point too, esp. Xarray stacking routines should be improved.