Added comments for the deprecated function 'delim_whitespace'.

tardis/io/model/readers/artis.py

@@ -50,6 +50,10 @@ def read_artis_density(fname):
         usecols=(0, 1, 2, 4, 5, 6, 7),
         dtype={item: np.float64 for item in artis_model_columns},
         names=artis_model_columns,
+        # The argument `delim_whitespace` was changed to `sep`
+        #   because the first one is deprecated since version 2.2.0.
+        #   The regular expression means: the separation is one or
+        #   more spaces together (simple space, tabs, new lines).
         sep=r"\s+",
     ).to_records(index=False)
 

tardis/io/model/readers/blondin_toymodel.py

@@ -44,6 +44,10 @@ def read_blondin_toymodel(fname):
     ]
 
     raw_blondin_csv = pd.read_csv(
+        # The argument `delim_whitespace` was changed to `sep`
+        #   because the first one is deprecated since version 2.2.0.
+        #   The regular expression means: the separation is one or
+        #   more spaces together (simple space, tabs, new lines).
         fname, sep=r"\s+", comment="#", header=None, names=columns
     )
     raw_blondin_csv.set_index("idx", inplace=True)

tardis/io/model/readers/stella.py

@@ -74,6 +74,10 @@ def read_stella_model(fname):
     # and the actual data
     data = pd.read_csv(
         fname,
+        # The argument `delim_whitespace` was changed to `sep`
+        #   because the first one is deprecated since version 2.2.0.
+        #   The regular expression means: the separation is one or
+        #   more spaces together (simple space, tabs, new lines).
         sep=r"\s+",
         skiprows=DATA_START_ROW + 1,
         header=None,

tardis/util/base.py

@@ -32,6 +32,10 @@
 ATOMIC_SYMBOLS_DATA = (
     pd.read_csv(
         get_internal_data_path("atomic_symbols.dat"),
+        # The argument `delim_whitespace` was changed to `sep`
+        #   because the first one is deprecated since version 2.2.0.
+        #   The regular expression means: the separation is one or
+        #   more spaces together (simple space, tabs, new lines).
         sep=r"\s+",
         names=["atomic_number", "symbol"],
     )