Update read module coordinate dimension manipulations to use new xarr…

…ay index (#473)

icepyx/core/read.py

@@ -320,7 +320,7 @@ class Read:
 
  # ----------------------------------------------------------------------
  # Constructors
- 
+
  def __init__(
  self,
  data_source=None, # DevNote: Make this a required arg when catalog is removed
@@ -336,7 +336,7 @@ def __init__(
  "The `catalog` argument has been deprecated and intake is no longer supported. "
  "Please use the `data_source` argument to specify your dataset instead."
  )
- 
+
  if data_source is None:
  raise ValueError("data_source is a required arguemnt")
  # Raise warnings for deprecated arguments
@@ -457,7 +457,7 @@ def vars(self):
  if not hasattr(self, "_read_vars"):
  self._read_vars = Variables(path=self.filelist[0])
  return self._read_vars
- 
+
  @property
  def filelist(self):
  """
@@ -591,22 +591,18 @@ def _add_vars_to_ds(is2ds, ds, grp_path, wanted_groups_tiered, wanted_dict):
  .assign_coords(
  {
  spot_dim_name: (spot_dim_name, [spot]),
- "delta_time": ("delta_time", photon_ids),
+ "photon_idx": ("delta_time", photon_ids),
  }
  )
  .assign({spot_var_name: (("gran_idx", spot_dim_name), [[track_str]])})
- .rename_dims({"delta_time": "photon_idx"})
- .rename({"delta_time": "photon_idx"})
- # .set_index("photon_idx")
+ .swap_dims({"delta_time": "photon_idx"})
  )
 
  # handle cases where the delta time is 2d due to multiple cycles in that group
  if spot_dim_name == "pair_track" and np.ndim(hold_delta_times) > 1:
  ds = ds.assign_coords(
  {"delta_time": (("photon_idx", "cycle_number"), hold_delta_times)}
  )
- else:
- ds = ds.assign_coords({"delta_time": ("photon_idx", hold_delta_times)})
 
  # for ATL11
  if "ref_pt" in ds.coords:
@@ -721,15 +717,15 @@ def load(self):
 
  if not self.vars.wanted:
  raise AttributeError(
- 'No variables listed in self.vars.wanted. Please use the Variables class '
- 'via self.vars to search for desired variables to read and self.vars.append(...) '
- 'to add variables to the wanted variables list.'
+ "No variables listed in self.vars.wanted. Please use the Variables class "
+ "via self.vars to search for desired variables to read and self.vars.append(...) "
+ "to add variables to the wanted variables list."
  )
- 
+
  # Append the minimum variables needed for icepyx to merge the datasets
  # Skip products which do not contain required variables
- if self.product not in ['ATL14', 'ATL15', 'ATL23']:
- var_list=[
+ if self.product not in ["ATL14", "ATL15", "ATL23"]:
+ var_list = [
  "sc_orient",
  "atlas_sdp_gps_epoch",
  "cycle_number",
@@ -743,7 +739,7 @@ def load(self):
  var_list.remove("sc_orient")
 
  self.vars.append(defaults=False, var_list=var_list)
- 
+
  try:
  groups_list = list_of_dict_vals(self.vars.wanted)
  except AttributeError: