FEAT-#7647 Shorten the hybrid progress bar text

- Make it fixed width
- Format row/col estimates with general formatting and limit to 6 characters
- Trim the operation name if needed, prefer the method over the object

Author: sfc-gh-jkew

modin/pandas/base.py

@@ -4505,16 +4505,18 @@ def set_backend(
         normalized_backend = Backend.normalize(backend)
         if normalized_backend != self_backend:
             max_rows, max_cols = self._query_compiler._max_shape()
+            # Format the transfer string to be relatively short, but informative. Each
+            # backend is given an allowable width of 10 and the shape integers use the
+            # general format to use scientific notation when needed.
+            operation_str = switch_operation
             if switch_operation is None:
-                desc = (
-                    f"Transferring data from {self_backend} to {normalized_backend}"
-                    + f" with max estimated shape {max_rows}x{max_cols}"
-                )
-            else:
-                desc = (
-                    f"Transferring data from {self_backend} to {normalized_backend} for"
-                    + f" '{switch_operation}' with max estimated shape {max_rows}x{max_cols}"
-                )
+                operation_str = ""
+            # Provide the switch_operation; and specifically only the method, so
+            # DataFrame.merge would become "merge"
+            desc = (
+                f"Transferring: {self_backend:>10.10} => {normalized_backend:<10.10} "
+                + f" | {operation_str.split('.')[-1]:^10.10} | ~({max_rows:^5g},{max_cols:^5g})"
+            )
 
             if ShowBackendSwitchProgress.get():
                 try:

modin/tests/pandas/native_df_interoperability/test_compiler_caster.py

@@ -857,7 +857,7 @@ def test_progress_bar_shows_modin_pandas_for_general_functions(self):
             desc = call_args[1]["desc"]  # Get the 'desc' keyword argument
 
             assert desc.startswith(
-                "Transferring data from Big_Data_Cloud to Small_Data_Local for 'modin.pandas.read_json'"
+                "Transferring: Big_Data_C => Small_Data  | read_json  | ~(  9  ,  1  )"
             )
 
     def test_agg(self):

modin/tests/pandas/test_backend.py

@@ -422,10 +422,10 @@ def do_groupby(series):
 @pytest.mark.parametrize(
     "switch_operation,expected_output",
     [
-        (None, "Transferring data from Python_Test to Pandas with max estimated shape"),
+        (None, "Transferring: Python_Tes => Pandas      |            | ~(  3  ,  1  )"),
         (
             "test_operation",
-            "Transferring data from Python_Test to Pandas for 'test_operation' with max estimated shape",
+            "Transferring: Python_Tes => Pandas      | test_opera | ~(  3  ,  1  )",
         ),
     ],
 )