[PATCH v3 12/15] perf python: Fix MetricGroup return type in perf.pyi

The metrics() function can return a dictionary where the value is either
a string or a list of strings, so the type signature in the stub file
should be Union[str, List[str]].

Fixes: 430da3cd03b4 ("perf python: Add perf.pyi stubs file")
Signed-off-by: Ian Rogers <[email protected]>
---
 tools/perf/python/perf.pyi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/python/perf.pyi b/tools/perf/python/perf.pyi
index f266c9baffd0..58b0b3ed819d 100644
--- a/tools/perf/python/perf.pyi
+++ b/tools/perf/python/perf.pyi
@@ -1,5 +1,5 @@
 """Type stubs for the perf Python module."""
-from typing import Callable, Dict, List, Optional, Any, Iterator
+from typing import Callable, Dict, List, Optional, Any, Iterator, Union
 
 def config_get(name: str) -> Optional[str]:
     """Get a configuration value from perf config.
@@ -12,7 +12,7 @@ def config_get(name: str) -> Optional[str]:
     """
     ...
 
-def metrics() -> List[Dict[str, str]]:
+def metrics() -> List[Dict[str, Union[str, List[str]]]]:
     """Get a list of available metrics.
 
     Returns:
-- 
2.55.0.679.g6767b8d81c-goog