fix: linting and removing unecessary public symbols

Author: nerstak

exporter/opentelemetry-exporter-prometheus/src/opentelemetry/exporter/prometheus/__init__.py

@@ -98,8 +98,8 @@
 
 _logger = getLogger(__name__)
 
-TARGET_INFO_NAME = "target"
-TARGET_INFO_DESCRIPTION = "Target metadata"
+_TARGET_INFO_NAME = "target"
+_TARGET_INFO_DESCRIPTION = "Target metadata"
 
 
 def _convert_buckets(
@@ -188,10 +188,10 @@ def collect(self) -> None:
                         attributes = {**attributes, **res.resource.attributes}
 
                     self._target_info = self._create_info_metric(
-                        TARGET_INFO_NAME, TARGET_INFO_DESCRIPTION, attributes
+                        _TARGET_INFO_NAME, _TARGET_INFO_DESCRIPTION, attributes
                     )
                 metric_family_id_metric_family[
-                    TARGET_INFO_NAME
+                    _TARGET_INFO_NAME
                 ] = self._target_info
 
         while self._metrics_datas:

exporter/opentelemetry-exporter-prometheus/tests/test_prometheus_exporter.py

@@ -302,7 +302,8 @@ def test_multiple_collection_calls(self):
     def test_target_info_enabled_by_default(self):
         metric_reader = PrometheusMetricReader()
         provider = MeterProvider(
-            metric_readers=[metric_reader], resource=Resource({"os": "Unix", "histo": 1})
+            metric_readers=[metric_reader],
+            resource=Resource({"os": "Unix", "histo": 1}),
         )
         meter = provider.get_meter("getting-started", "0.1.2")
         counter = meter.create_counter("counter")
@@ -324,7 +325,8 @@ def test_target_info_enabled_by_default(self):
     def test_target_info_disabled(self):
         metric_reader = PrometheusMetricReader(disable_target_info=True)
         provider = MeterProvider(
-            metric_readers=[metric_reader], resource=Resource({"os": "Unix", "histo": 1})
+            metric_readers=[metric_reader],
+            resource=Resource({"os": "Unix", "histo": 1}),
         )
         meter = provider.get_meter("getting-started", "0.1.2")
         counter = meter.create_counter("counter")