Rename "handle" to "bound metric instrument"

examples/metrics/record.py

@@ -62,11 +62,11 @@
 
 # Bound instrument usage
 
-# You can record metrics with bound metric instruments. Bound metric instruments
-# are created by passing in a labelset. A bound metric instrument  is
-# essentially metric data that corresponds to a specific set of labels.
-# Therefore, getting a bound metric instrument using the same set of labels will
-# yield the same bound metric instrument.
+# You can record metrics with bound metric instruments. Bound metric
+# instruments are created by passing in a labelset. A bound metric instrument
+# is essentially metric data that corresponds to a specific set of labels.
+# Therefore, getting a bound metric instrument using the same set of labels
+# will yield the same bound metric instrument.
 bound_counter = counter.bind(label_set)
 bound_counter.add(100)
 

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

@@ -108,11 +108,11 @@ def bind(self, label_set: LabelSet) -> "object":
 
         Bound metric instruments are useful to reduce the cost of repeatedly
         recording a metric with a pre-defined set of label values. All metric
-        kinds (counter, measure) support declaring a set of required label keys.
-        The values corresponding to these keys should be specified in every
-        bound metric instrument. "Unspecified" label values, in cases where a
-        bound metric instrument is requested but a value was not provided are
-        permitted.
+        kinds (counter, measure) support declaring a set of required label
+        keys. The values corresponding to these keys should be specified in
+        every bound metric instrument. "Unspecified" label values, in cases
+        where a bound metric instrument is requested but a value was not
+        provided are permitted.
 
         Args:
             label_set: `LabelSet` to associate with the bound instrument.
@@ -183,7 +183,8 @@ def record(self, value: ValueT, label_set: LabelSet) -> None:
 
 
 class Observer(abc.ABC):
-    """An observer type metric instrument used to capture a current set of values.
+    """An observer type metric instrument used to capture a current set of
+    values.
 
 
     Observer instruments are asynchronous, a callback is invoked with the

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

@@ -13,12 +13,11 @@
 # limitations under the License.
 
 import logging
-from collections import OrderedDict
 from typing import Dict, Sequence, Tuple, Type
 
 from opentelemetry import metrics as metrics_api
 from opentelemetry.sdk.metrics.export.aggregate import Aggregator
-from opentelemetry.sdk.metrics.export.batcher import Batcher, UngroupedBatcher
+from opentelemetry.sdk.metrics.export.batcher import UngroupedBatcher
 from opentelemetry.sdk.resources import Resource
 from opentelemetry.sdk.util.instrumentation import InstrumentationInfo
 from opentelemetry.util import time_ns