Add some repr()s to basic trace types. (#1485)

CHANGELOG.md

@@ -28,6 +28,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#1420](https://github.com/open-telemetry/opentelemetry-python/pull/1420))
 - `opentelemetry-exporter-zipkin` Add support for array attributes in Span and Resource exports
   ([#1285](https://github.com/open-telemetry/opentelemetry-python/pull/1285))
+- Added `__repr__` for `DefaultSpan`, added `trace_flags` to `__repr__` of
+  `SpanContext` ([#1485](https://github.com/open-telemetry/opentelemetry-python/pull/1485)])
 
 ## [0.16b1](https://github.com/open-telemetry/opentelemetry-python/releases/tag/v0.16b1) - 2020-11-26
 ### Added

opentelemetry-api/src/opentelemetry/trace/span.py

@@ -237,11 +237,12 @@ def __delattr__(self, *args: str) -> None:
 
     def __repr__(self) -> str:
         return (
-            "{}(trace_id={}, span_id={}, trace_state={!r}, is_remote={})"
+            "{}(trace_id={}, span_id={}, trace_flags=0x{:02x}, trace_state={!r}, is_remote={})"
         ).format(
             type(self).__name__,
             format_trace_id(self.trace_id),
             format_span_id(self.span_id),
+            self.trace_flags,
             self.trace_state,
             self.is_remote,
         )
@@ -291,6 +292,9 @@ def record_exception(
     ) -> None:
         pass
 
+    def __repr__(self) -> str:
+        return "DefaultSpan({!r})".format(self._context)
+
 
 INVALID_SPAN_ID = 0x0000000000000000
 INVALID_TRACE_ID = 0x00000000000000000000000000000000