Add ExponentialHistograms to data types supported (#4134)

Author: bogdandrutu

CHANGELOG.md

@@ -25,6 +25,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#4103](https://github.com/open-telemetry/opentelemetry-python/pull/4103))
 - Update semantic conventions to version 1.27.0
   ([#4104](https://github.com/open-telemetry/opentelemetry-python/pull/4104))
+- Export ExponentialHistogram and ExponentialHistogramDataPoint
+  ([#4134](https://github.com/open-telemetry/opentelemetry-python/pull/4134))
 - Implement Client Key and Certificate File Support for All OTLP Exporters
   ([#4116](https://github.com/open-telemetry/opentelemetry-python/pull/4116))
 

opentelemetry-sdk/src/opentelemetry/sdk/metrics/_internal/point.py

@@ -183,8 +183,10 @@ def to_json(self, indent=4) -> str:
 
 
 # pylint: disable=invalid-name
-DataT = Union[Sum, Gauge, Histogram]
-DataPointT = Union[NumberDataPoint, HistogramDataPoint]
+DataT = Union[Sum, Gauge, Histogram, ExponentialHistogram]
+DataPointT = Union[
+    NumberDataPoint, HistogramDataPoint, ExponentialHistogramDataPoint
+]
 
 
 @dataclass(frozen=True)

opentelemetry-sdk/src/opentelemetry/sdk/metrics/export/__init__.py

@@ -43,6 +43,7 @@
 
 __all__ = [
     "AggregationTemporality",
+    "Buckets",
     "ConsoleMetricExporter",
     "InMemoryMetricReader",
     "MetricExporter",
@@ -51,6 +52,8 @@
     "PeriodicExportingMetricReader",
     "DataPointT",
     "DataT",
+    "ExponentialHistogram",
+    "ExponentialHistogramDataPoint",
     "Gauge",
     "Histogram",
     "HistogramDataPoint",