perf python: Add __str__ and __repr__ functions to evlist

This allows the values in the evlist 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
  >>> perf.parse_events('cycles,data_read')
  evlist([cycles,uncore_imc_free_running_0/data_read/,uncore_imc_free_running_1/data_read/])

Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Colin Ian King <colin.i.king@gmail.com>
Cc: Dapeng Mi <dapeng1.mi@linux.intel.com>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Veronika Molnarova <vmolnaro@redhat.com>
Cc: Weilin Wang <weilin.wang@intel.com>
Link: https://lore.kernel.org/r/20241119011644.971342-21-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index c84c912874b7151b104b22e26fb553dcaf3271ec..c556cbc582ae4181a25f4d552107ce66403ced2f 100644 (file)
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -1069,6 +1069,30 @@ static PyObject *pyrf_evlist__item(PyObject *obj, Py_ssize_t i)
        return Py_BuildValue("O", container_of(pos, struct pyrf_evsel, evsel));
 }
 
+static PyObject *pyrf_evlist__str(PyObject *self)
+{
+       struct pyrf_evlist *pevlist = (void *)self;
+       struct evsel *pos;
+       struct strbuf sb = STRBUF_INIT;
+       bool first = true;
+       PyObject *result;
+
+       strbuf_addstr(&sb, "evlist([");
+       evlist__for_each_entry(&pevlist->evlist, pos) {
+               if (!first)
+                       strbuf_addch(&sb, ',');
+               if (!pos->pmu)
+                       strbuf_addstr(&sb, evsel__name(pos));
+               else
+                       strbuf_addf(&sb, "%s/%s/", pos->pmu->name, evsel__name(pos));
+               first = false;
+       }
+       strbuf_addstr(&sb, "])");
+       result = PyUnicode_FromString(sb.buf);
+       strbuf_release(&sb);
+       return result;
+}
+
 static PySequenceMethods pyrf_evlist__sequence_methods = {
        .sq_length = pyrf_evlist__length,
        .sq_item   = pyrf_evlist__item,
@@ -1086,6 +1110,8 @@ static PyTypeObject pyrf_evlist__type = {
        .tp_doc         = pyrf_evlist__doc,
        .tp_methods     = pyrf_evlist__methods,
        .tp_init        = (initproc)pyrf_evlist__init,
+       .tp_repr        = pyrf_evlist__str,
+       .tp_str         = pyrf_evlist__str,
 };
 
 static int pyrf_evlist__setup_types(void)