resolve flake8 and black issues

Author: brettlangdon

ddtrace/__init__.py

@@ -4,12 +4,14 @@
 from .internal.import_hooks import patch as patch_import_hooks
 patch_import_hooks()  # noqa: E402
 
-from .monkey import patch, patch_all
-from .pin import Pin
-from .span import Span
-from .tracer import Tracer
-from .settings import config
-from .utils.deprecation import deprecated
+
+from .monkey import patch, patch_all  # noqa: E402
+from .pin import Pin  # noqa: E402
+from .span import Span  # noqa: E402
+from .tracer import Tracer  # noqa: E402
+from .settings import config  # noqa: E402
+from .utils.deprecation import deprecated  # noqa: E402
+
 
 try:
     __version__ = pkg_resources.get_distribution(__name__).version

ddtrace/compat.py

@@ -184,7 +184,7 @@ def _shadowed_dict(klass):
                 pass
             else:
                 if not (
-                    type(class_dict) is types.GetSetDescriptorType
+                    type(class_dict) is types.GetSetDescriptorType  # noqa: E721
                     and class_dict.__name__ == "__dict__"  # noqa: E721,E261,W504
                     and class_dict.__objclass__ is entry  # noqa: E261,W504
                 ):

ddtrace/opentracer/tracer.py

@@ -69,7 +69,7 @@ def __init__(self, service_name=None, config=None, scope_manager=None, dd_tracer
             invalid_keys = config_invalid_keys(self._config)
             if invalid_keys:
                 str_invalid_keys = ','.join(invalid_keys)
-                raise ConfigException('invalid key(s) given (%s)'.format(str_invalid_keys))
+                raise ConfigException('invalid key(s) given ({})'.format(str_invalid_keys))
 
         if not self._service_name:
             raise ConfigException(""" Cannot detect the \'service_name\'.

ddtrace/span.py

@@ -383,7 +383,7 @@ def pprint(self):
         ]
 
         lines.extend((' ', '%s:%s' % kv) for kv in sorted(self.meta.items()))
-        return '\n'.join('%10s %s' % l for l in lines)
+        return '\n'.join('%10s %s' % line for line in lines)
 
     @property
     def context(self):

tests/contrib/asyncio/test_tracer.py

@@ -370,6 +370,7 @@ def test_trace_multiple_coroutines_ot_inner(self):
         # if multiple coroutines have nested tracing, they must belong
         # to the same trace
         ot_tracer = init_tracer('asyncio_svc', self.tracer)
+
         @asyncio.coroutine
         def coro():
             # another traced coroutine