perf python: Add __str__ and __repr__ functions to evsel

This allows evsel to be shown in the REPL like:

  Python 3.11.9 (main, Jun 19 2024, 00:38:48) [GCC 13.2.0] on linux
  Type "help", "copyright", "credits" or "license" for more information.
  >>> import sys
  >>> sys.path.insert(0, '/tmp/perf/python')
  >>> import perf
  >>> x=perf.parse_events('cycles,data_read')
  >>> print(x)
  evlist([cycles,uncore_imc_free_running_0/data_read/,uncore_imc_free_running_1/data_read/])
  >>> x[0]
  evsel(cycles)
  >>> x[1]
  evsel(uncore_imc_free_running_0/data_read/)
  >>> x[2]
  evsel(uncore_imc_free_running_1/data_read/)

Signed-off-by: Ian Rogers <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Athira Rajeev <[email protected]>
Cc: Colin Ian King <[email protected]>
Cc: Dapeng Mi <[email protected]>
Cc: Howard Chu <[email protected]>
Cc: Ilya Leoshkevich <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: James Clark <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Michael Petlan <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Richter <[email protected]>
Cc: Veronika Molnarova <[email protected]>
Cc: Weilin Wang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

1 files changed, 13 insertions, 0 deletions

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index c556cbc582ae..893aa4185c03 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -781,6 +781,17 @@ static PyObject *pyrf_evsel__open(struct pyrf_evsel *pevsel,
 	return Py_None;
 }
 
+static PyObject *pyrf_evsel__str(PyObject *self)
+{
+	struct pyrf_evsel *pevsel = (void *)self;
+	struct evsel *evsel = &pevsel->evsel;
+
+	if (!evsel->pmu)
+		return PyUnicode_FromFormat("evsel(%s)", evsel__name(evsel));
+
+	return PyUnicode_FromFormat("evsel(%s/%s/)", evsel->pmu->name, evsel__name(evsel));
+}
+
 static PyMethodDef pyrf_evsel__methods[] = {
 	{
 		.ml_name  = "open",
@@ -802,6 +813,8 @@ static PyTypeObject pyrf_evsel__type = {
 	.tp_doc		= pyrf_evsel__doc,
 	.tp_methods	= pyrf_evsel__methods,
 	.tp_init	= (initproc)pyrf_evsel__init,
+	.tp_str         = pyrf_evsel__str,
+	.tp_repr        = pyrf_evsel__str,
 };
 
 static int pyrf_evsel__setup_types(void)