Fix flake errors

Author: bmermet

ddtrace/processors.py

@@ -11,7 +11,8 @@ class FilterRequestsOnUrl():
     the provided regular expression using the standard python regexp match
     semantic (https://docs.python.org/2/library/re.html#re.match).
 
-    :param list regexps: the  list of regular expressions (as strings) defining the urls that should be filtered out. (a single string is also accepted)
+    :param list regexps: the  list of regular expressions (as strings) defining
+    the urls that should be filtered out. (a single string is also accepted)
 
     Examples:
 
@@ -42,7 +43,7 @@ def process_trace(self, trace):
         trace is discarded.
         """
         for span in trace:
-            if span.parent_id == None and span.get_tag(http.URL) is not None:
+            if span.parent_id is None and span.get_tag(http.URL) is not None:
                 url = span.get_tag(http.URL)
                 for regexp in self._regexps:
                     if regexp.match(url):

ddtrace/settings.py

@@ -1,4 +1,4 @@
 PROCESSING_PIPELINE_KEY = "PROCESSING_PIPELINE"
 
-#Shorter Alias
+# Shorter Alias
 PP_KEY = PROCESSING_PIPELINE_KEY

ddtrace/tracer.py

@@ -96,7 +96,11 @@ def configure(self, enabled=None, hostname=None, port=None, sampler=None,
                 processing_pipeline = settings[PP_KEY]
 
         if hostname is not None or port is not None or processing_pipeline is not None:
-            self.writer = AgentWriter(hostname or self.DEFAULT_HOSTNAME, port or self.DEFAULT_PORT, processing_pipeline=processing_pipeline)
+            self.writer = AgentWriter(
+                        hostname or self.DEFAULT_HOSTNAME,
+                        port or self.DEFAULT_PORT,
+                        processing_pipeline=processing_pipeline
+                    )
 
         if sampler is not None:
             self.sampler = sampler

ddtrace/writer.py

@@ -53,7 +53,11 @@ def _reset_worker(self):
 
         # ensure we have an active thread working on this queue
         if not self._worker or not self._worker.is_alive():
-            self._worker = AsyncWorker(self.api, self._traces, self._services, processing_pipeline=self._processing_pipeline)
+            self._worker = AsyncWorker(
+                        self.api,
+                        self._traces,
+                        self._services, processing_pipeline=self._processing_pipeline
+                    )
 
 
 class AsyncWorker(object):