code: def write_libxc_docs_json(xcfuncs, jpath):
      
      from copy import deepcopy
      xcfuncs = deepcopy(xcfuncs)
  
      # Remove XC_FAMILY from Family and XC_ from Kind to make strings more human-readable.
      for d in xcfuncs.values():
          d["Family"] = d["Family"].replace("XC_FAMILY_", "", 1)
          d["Kind"] = d["Kind"].replace("XC_", "", 1)
  
      # Build lightweight version with a subset of keys.
      for num, d in xcfuncs.items():
          xcfuncs[num] = {k: d[k] for k in ("Family", "Kind", "References")}
          # Descriptions are optional
          for opt in ("Description 1", "Description 2"):
              desc = d.get(opt)
              if desc is not None: xcfuncs[num][opt] = desc
  
      with open(jpath, "wt") as fh:
          json.dump(xcfuncs, fh)
  
      return xcfuncs
docs: Write json file with libxc metadata to path jpath.