Lint unused imports in init modules

.pylintrc

@@ -229,7 +229,7 @@ dummy-variables-rgx=_+$|(_[a-zA-Z0-9_]*[a-zA-Z0-9]+?$)|dummy|^ignored_|^unused_
 ignored-argument-names=_.*|^ignored_|^unused_
 
 # Tells whether we should check for unused import in __init__ files.
-init-import=no
+init-import=yes
 
 # List of qualified module names which can have objects that can redefine
 # builtins.

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

@@ -19,16 +19,14 @@
 import re
 from typing import Sequence
 
-from prometheus_client import start_http_server
 from prometheus_client.core import (
     REGISTRY,
-    CollectorRegistry,
     CounterMetricFamily,
     GaugeMetricFamily,
     UnknownMetricFamily,
 )
 
-from opentelemetry.metrics import Counter, Gauge, Measure, Metric
+from opentelemetry.metrics import Counter, Gauge, Measure
 from opentelemetry.sdk.metrics.export import (
     MetricRecord,
     MetricsExporter,

ext/opentelemetry-ext-psycopg2/src/opentelemetry/ext/psycopg2/__init__.py

@@ -13,8 +13,8 @@
 # limitations under the License.
 
 """
-The opentelemetry-ext-psycopg2 package allows tracing PostgreSQL queries made by the
-Psycopg2 library.
+The opentelemetry-ext-psycopg2 package allows tracing PostgreSQL queries made
+by the Psycopg2 library.
 """
 
 import logging
@@ -25,7 +25,6 @@
 from psycopg2.sql import Composable
 
 from opentelemetry.ext.dbapi import DatabaseApiIntegration, TracedCursor
-from opentelemetry.trace import Tracer
 
 logger = logging.getLogger(__name__)
 

opentelemetry-api/src/opentelemetry/context/__init__.py

@@ -19,6 +19,7 @@
 
 from pkg_resources import iter_entry_points
 
+# pylint: disable=unused-import
 from opentelemetry.context.context import Context, RuntimeContext
 
 logger = logging.getLogger(__name__)

opentelemetry-api/src/opentelemetry/trace/propagation/__init__.py

@@ -11,9 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from typing import Optional
-
-from opentelemetry.trace import INVALID_SPAN_CONTEXT, Span, SpanContext
 
 _SPAN_CONTEXT_KEY = "extracted-span-context"
 SPAN_KEY = "current-span"

opentelemetry-sdk/src/opentelemetry/sdk/distributedcontext/__init__.py

@@ -16,7 +16,7 @@
 from contextlib import contextmanager
 
 from opentelemetry import distributedcontext as dctx_api
-from opentelemetry.context import Context, get_value, set_value
+from opentelemetry.context import Context
 from opentelemetry.distributedcontext import (
     distributed_context_from_context,
     with_distributed_context,

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

@@ -13,7 +13,6 @@
 # limitations under the License.
 
 import logging
-from collections import OrderedDict
 from typing import Dict, Sequence, Tuple, Type
 
 from opentelemetry import metrics as metrics_api

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

@@ -13,7 +13,7 @@
 # limitations under the License.
 
 from enum import Enum
-from typing import Sequence, Tuple
+from typing import Sequence
 
 
 class MetricsExportResult(Enum):

opentelemetry-sdk/src/opentelemetry/sdk/trace/__init__.py

@@ -26,7 +26,7 @@
 from opentelemetry import trace as trace_api
 from opentelemetry.sdk import util
 from opentelemetry.sdk.util import BoundedDict, BoundedList
-from opentelemetry.trace import SpanContext, sampling
+from opentelemetry.trace import sampling
 from opentelemetry.trace.propagation import SPAN_KEY
 from opentelemetry.trace.status import Status, StatusCanonicalCode
 from opentelemetry.util import time_ns, types