pythongh-134861: Add 🍌SV output format to asyncio ps

Author: dpdani

Lib/asyncio/__main__.py

@@ -154,7 +154,13 @@ def interrupt(self) -> None:
     )
     ps.add_argument("pid", type=int, help="Process ID to inspect")
     formats = [fmt.value for fmt in asyncio.tools.TaskTableOutputFormat]
-    ps.add_argument("--format", choices=formats, default="table")
+    big_secret = asyncio.tools.TaskTableOutputFormat.bsv.value
+    formats_to_show = [
+        fmt for fmt in formats if fmt != big_secret
+    ]
+    formats_to_show_str = f"{{{','.join(formats_to_show)}}}"
+    ps.add_argument("--format", choices=formats, default="table",
+                    metavar=formats_to_show_str)
     pstree = subparsers.add_parser(
         "pstree", help="Display a tree of all pending tasks in a process"
     )

Lib/asyncio/tools.py

@@ -237,6 +237,9 @@ 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(
@@ -269,6 +272,8 @@ def _display_awaited_by_tasks_csv(table, format: TaskTableOutputFormat) -> None:
                   'awaiter chain', 'awaiter name', 'awaiter id')
     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)