use f-strings where possible

exporter/opentelemetry-exporter-jaeger-thrift/src/opentelemetry/exporter/jaeger/thrift/send.py

@@ -123,9 +123,9 @@ def __init__(self, thrift_url="", auth=None, timeout_in_millis=None):
 
         # set basic auth header
         if auth is not None:
-            auth_header = "{}:{}".format(*auth)
+            auth_header = f"{auth[0]}:{auth[1]}"
             decoded = base64.b64encode(auth_header.encode()).decode("ascii")
-            basic_auth = dict(Authorization="Basic {}".format(decoded))
+            basic_auth = dict(Authorization=f"Basic {decoded}")
             self.http_transport.setCustomHeaders(basic_auth)
 
     def submit(self, batch: jaeger.Batch):

exporter/opentelemetry-exporter-otlp-proto-grpc/tests/test_otlp_trace_exporter.py

@@ -320,16 +320,12 @@ def test_otlp_exporter_endpoint(self, mock_secure, mock_insecure):
             self.assertEqual(
                 1,
                 mock_method.call_count,
-                "expected {} to be called for {} {}".format(
-                    mock_method, endpoint, insecure
-                ),
+                f"expected {mock_method} to be called for {endpoint} {insecure}",
             )
             self.assertEqual(
                 expected_endpoint,
                 mock_method.call_args[0][0],
-                "expected {} got {} {}".format(
-                    expected_endpoint, mock_method.call_args[0][0], endpoint
-                ),
+                f"expected {expected_endpoint} got {mock_method.call_args[0][0]} {endpoint}",
             )
             mock_method.reset_mock()
 

exporter/opentelemetry-exporter-zipkin-json/src/opentelemetry/exporter/zipkin/node_endpoint.py

@@ -64,7 +64,7 @@ def ipv4(self, address: IpInput) -> None:
             ipv4_address = ipaddress.ip_address(address)
             if not isinstance(ipv4_address, ipaddress.IPv4Address):
                 raise ValueError(
-                    "%r does not appear to be an IPv4 address" % address
+                    f"{address!r} does not appear to be an IPv4 address"
                 )
             self._ipv4 = ipv4_address
 
@@ -80,6 +80,6 @@ def ipv6(self, address: IpInput) -> None:
             ipv6_address = ipaddress.ip_address(address)
             if not isinstance(ipv6_address, ipaddress.IPv6Address):
                 raise ValueError(
-                    "%r does not appear to be an IPv6 address" % address
+                    f"{address!r} does not appear to be an IPv6 address"
                 )
             self._ipv6 = ipv6_address

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

@@ -153,8 +153,8 @@ def __init__(
         self._immutable = immutable
 
     def __repr__(self):
-        return "{}({}, maxlen={})".format(
-            type(self).__name__, dict(self._dict), self.maxlen
+        return (
+            f"{type(self).__name__}({dict(self._dict)}, maxlen={self.maxlen})"
         )
 
     def __getitem__(self, key):

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

@@ -537,7 +537,7 @@ def use_span(
                 span.set_status(
                     Status(
                         status_code=StatusCode.ERROR,
-                        description="{}: {}".format(type(exc).__name__, exc),
+                        description=f"{type(exc).__name__}: {exc}",
                     )
                 )
         raise

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

@@ -100,11 +100,7 @@ def inject(
         span_context = span.get_span_context()
         if span_context == trace.INVALID_SPAN_CONTEXT:
             return
-        traceparent_string = "00-{trace_id}-{span_id}-{:02x}".format(
-            span_context.trace_flags,
-            trace_id=format_trace_id(span_context.trace_id),
-            span_id=format_span_id(span_context.span_id),
-        )
+        traceparent_string = f"00-{format_trace_id(span_context.trace_id)}-{format_span_id(span_context.span_id)}-{span_context.trace_flags:02x}"
         setter.set(carrier, self._TRACEPARENT_HEADER_NAME, traceparent_string)
         if span_context.trace_state:
             tracestate_string = span_context.trace_state.to_header()

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

@@ -40,9 +40,7 @@
 
 _TRACECONTEXT_MAXIMUM_TRACESTATE_KEYS = 32
 _delimiter_pattern = re.compile(r"[ \t]*,[ \t]*")
-_member_pattern = re.compile(
-    "({})(=)({})[ \t]*".format(_KEY_FORMAT, _VALUE_FORMAT)
-)
+_member_pattern = re.compile(f"({_KEY_FORMAT})(=)({_VALUE_FORMAT})[ \t]*")
 _logger = logging.getLogger(__name__)
 
 
@@ -245,7 +243,7 @@ def __len__(self) -> int:
 
     def __repr__(self) -> str:
         pairs = [
-            "{key=%s, value=%s}" % (key, value)
+            f"{{key={key}, value={value}}}"
             for key, value in self._dict.items()
         ]
         return str(pairs)
@@ -478,16 +476,7 @@ def __delattr__(self, *args: str) -> None:
         )
 
     def __repr__(self) -> str:
-        return (
-            "{}(trace_id=0x{}, span_id=0x{}, 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,
-        )
+        return f"{type(self).__name__}(trace_id=0x{format_trace_id(self.trace_id)}, span_id=0x{format_span_id(self.span_id)}, trace_flags=0x{self.trace_flags:02x}, trace_state={self.trace_state!r}, is_remote={self.is_remote})"
 
 
 class NonRecordingSpan(Span):
@@ -540,7 +529,7 @@ def record_exception(
         pass
 
     def __repr__(self) -> str:
-        return "NonRecordingSpan({!r})".format(self._context)
+        return f"NonRecordingSpan({self._context!r})"
 
 
 INVALID_SPAN_ID = 0x0000000000000000

opentelemetry-api/src/opentelemetry/util/_providers.py

@@ -32,12 +32,12 @@ def _load_provider(
     try:
         entry_point = next(
             iter_entry_points(
-                "opentelemetry_{}".format(provider),
+                f"opentelemetry_{provider}",
                 name=cast(
                     str,
                     environ.get(
                         provider_environment_variable,
-                        "default_{}".format(provider),
+                        f"default_{provider}",
                     ),
                 ),
             )

opentelemetry-api/src/opentelemetry/util/_time.py

@@ -17,7 +17,7 @@
 
 if version_info.minor < 7:
     getLogger(__name__).warning(  # pylint: disable=logging-not-lazy
-        "You are using Python 3.%s. This version does not support timestamps "
+        "You are using Python 3.%s. This version does not support timestamps "  # pylint: disable=C0209
         "with nanosecond precision and the OpenTelemetry SDK will use "
         "millisecond precision instead. Please refer to PEP 564 for more "
         "information. Please upgrade to Python 3.7 or newer to use nanosecond "

opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py

@@ -119,7 +119,7 @@ def initialize():
         logger.exception("Failed to auto initialize opentelemetry")
     finally:
         environ["PYTHONPATH"] = sub(
-            r"{}{}?".format(dirname(abspath(__file__)), pathsep),
+            fr"{dirname(abspath(__file__))}{pathsep}?",
             "",
             environ["PYTHONPATH"],
         )

opentelemetry-instrumentation/src/opentelemetry/instrumentation/bootstrap.py

@@ -38,11 +38,9 @@ def wrapper(package=None):
         except subprocess.SubprocessError as exp:
             cmd = getattr(exp, "cmd", None)
             if cmd:
-                msg = 'Error calling system command "{0}"'.format(
-                    " ".join(cmd)
-                )
+                msg = f'Error calling system command "{" ".join(cmd)}"'
             if package:
-                msg = '{0} for package "{1}"'.format(msg, package)
+                msg = f'{msg} for package "{package}"'
             raise RuntimeError(msg)
 
     return wrapper
@@ -81,9 +79,7 @@ def _pip_check():
     for package_tup in libraries.values():
         for package in package_tup:
             if package.lower() in pip_check_lower:
-                raise RuntimeError(
-                    "Dependency conflict found: {}".format(pip_check)
-                )
+                raise RuntimeError(f"Dependency conflict found: {pip_check}")
 
 
 def _is_installed(req):

opentelemetry-instrumentation/src/opentelemetry/instrumentation/dependencies.py

@@ -21,9 +21,7 @@ def __init__(self, required, found=None):
         self.found = found
 
     def __str__(self):
-        return 'DependencyConflict: requested: "{0}" but found: "{1}"'.format(
-            self.required, self.found
-        )
+        return f'DependencyConflict: requested: "{self.required}" but found: "{self.found}"'
 
 
 def get_dist_dependency_conflicts(

opentelemetry-instrumentation/src/opentelemetry/instrumentation/propagators.py

@@ -54,7 +54,7 @@ class DictHeaderSetter(Setter):
     def set(self, carrier, key, value):  # pylint: disable=no-self-use
         old_value = carrier.get(key, "")
         if old_value:
-            value = "{0}, {1}".format(old_value, value)
+            value = f"{old_value}, {value}"
         carrier[key] = value
 
 
@@ -115,11 +115,7 @@ def inject(
         setter.set(
             carrier,
             header_name,
-            "00-{trace_id}-{span_id}-{:02x}".format(
-                span_context.trace_flags,
-                trace_id=format_trace_id(span_context.trace_id),
-                span_id=format_span_id(span_context.span_id),
-            ),
+            f"00-{format_trace_id(span_context.trace_id)}-{format_span_id(span_context.span_id)}-{span_context.trace_flags:02x}",
         )
         setter.set(
             carrier,

opentelemetry-instrumentation/tests/test_dependencies.py

@@ -50,9 +50,7 @@ def test_get_dependency_conflicts_mismatched_version(self):
         self.assertTrue(isinstance(conflict, DependencyConflict))
         self.assertEqual(
             str(conflict),
-            'DependencyConflict: requested: "pytest == 5000" but found: "pytest {0}"'.format(
-                pytest.__version__
-            ),
+            f'DependencyConflict: requested: "pytest == 5000" but found: "pytest {pytest.__version__}"',
         )
 
     def test_get_dist_dependency_conflicts(self):

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

@@ -91,9 +91,7 @@ def _import_tracer_provider_config_components(
         entry_point = component_entry_points.get(selected_component, None)
         if not entry_point:
             raise RuntimeError(
-                "Requested component '{}' not found in entry points for '{}'".format(
-                    selected_component, entry_point_name
-                )
+                f"Requested component '{selected_component}' not found in entry points for '{entry_point_name}'"
             )
 
         component_impl = entry_point.load()
@@ -116,9 +114,7 @@ def _import_exporters(
         if issubclass(exporter_impl, SpanExporter):
             trace_exporters[exporter_name] = exporter_impl
         else:
-            raise RuntimeError(
-                "{0} is not a trace exporter".format(exporter_name)
-            )
+            raise RuntimeError(f"{exporter_name} is not a trace exporter")
     return trace_exporters
 
 
@@ -133,7 +129,7 @@ def _import_id_generator(id_generator_name: str) -> IdGenerator:
     if issubclass(id_generator_impl, IdGenerator):
         return id_generator_impl
 
-    raise RuntimeError("{0} is not an IdGenerator".format(id_generator_name))
+    raise RuntimeError(f"{id_generator_name} is not an IdGenerator")
 
 
 def _initialize_components():

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

@@ -219,7 +219,7 @@ def _submit_and_await(
         self,
         func: Callable[[SpanProcessor], Callable[..., None]],
         *args: Any,
-        **kwargs: Any
+        **kwargs: Any,
     ):
         futures = []
         for sp in self._span_processors:
@@ -442,12 +442,10 @@ def to_json(self, indent=4):
         if self.parent is not None:
             if isinstance(self.parent, Span):
                 ctx = self.parent.context
-                parent_id = "0x{}".format(
-                    trace_api.format_span_id(ctx.span_id)
-                )
+                parent_id = f"0x{trace_api.format_span_id(ctx.span_id)}"
             elif isinstance(self.parent, SpanContext):
-                parent_id = "0x{}".format(
-                    trace_api.format_span_id(self.parent.span_id)
+                parent_id = (
+                    f"0x{trace_api.format_span_id(self.parent.span_id)}"
                 )
 
         start_time = None
@@ -484,12 +482,8 @@ def to_json(self, indent=4):
     @staticmethod
     def _format_context(context):
         x_ctx = OrderedDict()
-        x_ctx["trace_id"] = "0x{}".format(
-            trace_api.format_trace_id(context.trace_id)
-        )
-        x_ctx["span_id"] = "0x{}".format(
-            trace_api.format_span_id(context.span_id)
-        )
+        x_ctx["trace_id"] = f"0x{trace_api.format_trace_id(context.trace_id)}"
+        x_ctx["span_id"] = f"0x{trace_api.format_span_id(context.span_id)}"
         x_ctx["trace_state"] = repr(context.trace_state)
         return x_ctx
 
@@ -612,16 +606,7 @@ def __init__(
         )
 
     def __repr__(self):
-        return "{}(max_span_attributes={}, max_events_attributes={}, max_link_attributes={}, max_attributes={}, max_events={}, max_links={}, max_attribute_length={})".format(
-            type(self).__name__,
-            self.max_span_attribute_length,
-            self.max_event_attributes,
-            self.max_link_attributes,
-            self.max_attributes,
-            self.max_events,
-            self.max_links,
-            self.max_attribute_length,
-        )
+        return f"{type(self).__name__}(max_span_attributes={self.max_span_attribute_length}, max_events_attributes={self.max_event_attributes}, max_link_attributes={self.max_link_attributes}, max_attributes={self.max_attributes}, max_events={self.max_events}, max_links={self.max_links}, max_attribute_length={self.max_attribute_length})"
 
     @classmethod
     def _from_env_if_absent(
@@ -759,9 +744,7 @@ def __init__(
             self._links = BoundedList.from_seq(self._limits.max_links, links)
 
     def __repr__(self):
-        return '{}(name="{}", context={})'.format(
-            type(self).__name__, self._name, self._context
-        )
+        return f'{type(self).__name__}(name="{self._name}", context={self._context})'
 
     def _new_events(self):
         return BoundedList(self._limits.max_events)
@@ -889,9 +872,7 @@ def __exit__(
                 self.set_status(
                     Status(
                         status_code=StatusCode.ERROR,
-                        description="{}: {}".format(
-                            exc_type.__name__, exc_val
-                        ),
+                        description=f"{exc_type.__name__}: {exc_val}",
                     )
                 )
 

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

@@ -145,9 +145,7 @@ class SamplingResult:
     """
 
     def __repr__(self) -> str:
-        return "{}({}, attributes={})".format(
-            type(self).__name__, str(self.decision), str(self.attributes)
-        )
+        return f"{type(self).__name__}({str(self.decision)}, attributes={str(self.attributes)})"
 
     def __init__(
         self,
@@ -271,7 +269,7 @@ def should_sample(
         )
 
     def get_description(self) -> str:
-        return "TraceIdRatioBased{{{}}}".format(self._rate)
+        return f"TraceIdRatioBased{{{self._rate}}}"
 
 
 class ParentBased(Sampler):
@@ -342,13 +340,7 @@ def should_sample(
         )
 
     def get_description(self):
-        return "ParentBased{{root:{},remoteParentSampled:{},remoteParentNotSampled:{}," "localParentSampled:{},localParentNotSampled:{}}}".format(
-            self._root.get_description(),
-            self._remote_parent_sampled.get_description(),
-            self._remote_parent_not_sampled.get_description(),
-            self._local_parent_sampled.get_description(),
-            self._local_parent_not_sampled.get_description(),
-        )
+        return f"ParentBased{{root:{self._root.get_description()},remoteParentSampled:{self._remote_parent_sampled.get_description()},remoteParentNotSampled:{self._remote_parent_not_sampled.get_description()},localParentSampled:{self._local_parent_sampled.get_description()},localParentNotSampled:{self._local_parent_not_sampled.get_description()}}}"
 
 
 DEFAULT_OFF = ParentBased(ALWAYS_OFF)

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

@@ -54,9 +54,7 @@ def __init__(self, maxlen: Optional[int]):
         self._lock = threading.Lock()
 
     def __repr__(self):
-        return "{}({}, maxlen={})".format(
-            type(self).__name__, list(self._dq), self._dq.maxlen
-        )
+        return f"{type(self).__name__}({list(self._dq)}, maxlen={self._dq.maxlen})"
 
     def __getitem__(self, index):
         return self._dq[index]
@@ -113,8 +111,8 @@ def __init__(self, maxlen: Optional[int]):
         self._lock = threading.Lock()  # type: threading.Lock
 
     def __repr__(self):
-        return "{}({}, maxlen={})".format(
-            type(self).__name__, dict(self._dict), self.maxlen
+        return (
+            f"{type(self).__name__}({dict(self._dict)}, maxlen={self.maxlen})"
         )
 
     def __getitem__(self, key):