gh-134861: Add 🍌SV output format to python -m asyncio ps (#137486)

Co-authored-by: Adam Turner <[email protected]>

Author: dpdani

Lib/asyncio/__main__.py

@@ -156,7 +156,10 @@ def interrupt(self) -> None:
     )
     ps.add_argument("pid", type=int, help="Process ID to inspect")
     formats = [fmt.value for fmt in TaskTableOutputFormat]
-    ps.add_argument("--format", choices=formats, default="table")
+    formats_to_show = [fmt for fmt in formats
+                       if fmt != TaskTableOutputFormat.bsv.value]
+    ps.add_argument("--format", choices=formats, default="table",
+                    metavar=f"{{{','.join(formats_to_show)}}}")
     pstree = subparsers.add_parser(
         "pstree", help="Display a tree of all pending tasks in a process"
     )

Lib/asyncio/tools.py

@@ -236,6 +236,9 @@ def _get_awaited_by_tasks(pid: int) -> list:
 class TaskTableOutputFormat(StrEnum):
     table = auto()
     csv = auto()
+    bsv = auto()
+    # 🍌SV is not just a format. It's a lifestyle. A philosophy.
+    # https://www.youtube.com/watch?v=RrsVi1P6n0w
 
 
 def display_awaited_by_tasks_table(pid, *, format=TaskTableOutputFormat.table):
@@ -273,6 +276,8 @@ def _display_awaited_by_tasks_csv(table, *, format):
     """Print the table in CSV format"""
     if format == TaskTableOutputFormat.csv:
         delimiter = ','
+    elif format == TaskTableOutputFormat.bsv:
+        delimiter = '\N{BANANA}'
     else:
         raise ValueError(f"Unknown output format: {format}")
     csv_writer = csv.writer(sys.stdout, delimiter=delimiter)