Update flake8 to 3.7 branch

ddtrace/contrib/pyramid/patch.py

@@ -78,7 +78,7 @@ def insert_tween_if_needed(settings):
     # pyramid.  We need our tween to be before it, otherwise unhandled
     # exceptions will be caught before they reach our tween.
     idx = tweens.find(pyramid.tweens.EXCVIEW)
-    if idx is -1:
+    if idx == -1:
         settings['pyramid.tweens'] = tweens + '\n' + DD_TWEEN_NAME
     else:
         settings['pyramid.tweens'] = tweens[:idx] + DD_TWEEN_NAME + "\n" + tweens[idx:]

ddtrace/contrib/tornado/__init__.py

@@ -58,7 +58,7 @@ def notify(self):
             'analytics_enabled': False,
             'settings': {
                 'FILTERS':  [
-                    FilterRequestsOnUrl(r'http://test\.example\.com'),
+                    FilterRequestsOnUrl(r'http://test\\.example\\.com'),
                 ],
             },
         },

ddtrace/filters.py

@@ -18,15 +18,15 @@ class FilterRequestsOnUrl(object):
 
     To filter out http calls to domain api.example.com::
 
-        FilterRequestsOnUrl(r'http://api\.example\.com')
+        FilterRequestsOnUrl(r'http://api\\.example\\.com')
 
     To filter out http calls to all first level subdomains from example.com::
 
-        FilterRequestOnUrl(r'http://.*+\.example\.com')
+        FilterRequestOnUrl(r'http://.*+\\.example\\.com')
 
     To filter out calls to both http://test.example.com and http://example.com/healthcheck::
 
-        FilterRequestOnUrl([r'http://test\.example\.com', r'http://example\.com/healthcheck'])
+        FilterRequestOnUrl([r'http://test\\.example\\.com', r'http://example\\.com/healthcheck'])
     """
     def __init__(self, regexps):
         if isinstance(regexps, str):

ddtrace/monkey.py

@@ -96,7 +96,7 @@ def on_import(hook):
 def patch_all(**patch_modules):
     """Automatically patches all available modules.
 
-    :param dict \**patch_modules: Override whether particular modules are patched or not.
+    :param dict patch_modules: Override whether particular modules are patched or not.
 
         >>> patch_all(redis=False, cassandra=False)
     """
@@ -110,7 +110,7 @@ def patch(raise_errors=True, **patch_modules):
     """Patch only a set of given modules.
 
     :param bool raise_errors: Raise error if one patch fail.
-    :param dict \**patch_modules: List of modules to patch.
+    :param dict patch_modules: List of modules to patch.
 
         >>> patch(psycopg=True, elasticsearch=True)
     """

ddtrace/pin.py

@@ -48,7 +48,7 @@ def service(self):
         return self._config['service_name']
 
     def __setattr__(self, name, value):
-        if getattr(self, '_initialized', False) and name is not '_target':
+        if getattr(self, '_initialized', False) and name != '_target':
             raise AttributeError("can't mutate a pin, use override() or clone() instead")
         super(Pin, self).__setattr__(name, value)
 

tests/contrib/dbapi/test_unit.py

@@ -3,6 +3,7 @@
 from ddtrace import Pin
 from ddtrace.constants import ANALYTICS_SAMPLE_RATE_KEY
 from ddtrace.contrib.dbapi import FetchTracedCursor, TracedCursor, TracedConnection
+from ddtrace.span import Span
 from ...base import BaseTracerTestCase
 
 

tests/contrib/falcon/test_distributed_tracing.py

@@ -49,5 +49,5 @@ def test_distributred_tracing_disabled(self):
         eq_(len(traces), 1)
         eq_(len(traces[0]), 1)
 
-        ok_(traces[0][0].parent_id is not 42)
-        ok_(traces[0][0].trace_id is not 100)
+        ok_(traces[0][0].parent_id != 42)
+        ok_(traces[0][0].trace_id != 100)

tests/contrib/httplib/test_httplib.py

@@ -351,6 +351,7 @@ def test_httplib_request_and_response_headers(self):
 
         # Enabled when configured
         with self.override_config('hhtplib', {}):
+            from ddtrace.settings import IntegrationConfig
             integration_config = config.httplib  # type: IntegrationConfig
             integration_config.http.trace_headers(['my-header', 'access-control-allow-origin'])
             conn = self.get_http_connection(SOCKET)

tests/contrib/tornado/test_stack_context.py

@@ -45,5 +45,5 @@ def test_propagation_without_stack_context(self):
         traces = self.tracer.writer.pop_traces()
         eq_(len(traces), 1)
         eq_(len(traces[0]), 1)
-        ok_(traces[0][0].trace_id is not 100)
-        ok_(traces[0][0].parent_id is not 101)
+        ok_(traces[0][0].trace_id != 100)
+        ok_(traces[0][0].parent_id != 101)

tests/opentracer/test_tracer.py

@@ -301,7 +301,7 @@ def test_start_active_span_child_finish_after_parent(self, ot_tracer, writer):
         span2.finish()
 
         spans = writer.pop()
-        assert len(spans) is 2
+        assert len(spans) == 2
         assert spans[0].parent_id is None
         assert spans[1].parent_id is span1._dd_span.span_id
         assert spans[1].duration > spans[0].duration

tests/test_filters.py

@@ -23,13 +23,13 @@ def test_is_not_match(self):
     def test_list_match(self):
         span = Span(name='Name', tracer=None)
         span.set_tag(URL, r'http://anotherdomain.example.com')
-        filtr = FilterRequestsOnUrl(['http://domain\.example\.com', 'http://anotherdomain\.example\.com'])
+        filtr = FilterRequestsOnUrl([r'http://domain\.example\.com', r'http://anotherdomain\.example\.com'])
         trace = filtr.process_trace([span])
         self.assertIsNone(trace)
 
     def test_list_no_match(self):
         span = Span(name='Name', tracer=None)
         span.set_tag(URL, r'http://cooldomain.example.com')
-        filtr = FilterRequestsOnUrl(['http://domain\.example\.com', 'http://anotherdomain\.example\.com'])
+        filtr = FilterRequestsOnUrl([r'http://domain\.example\.com', r'http://anotherdomain\.example\.com'])
         trace = filtr.process_trace([span])
         self.assertIsNotNone(trace)

tox.ini

@@ -394,7 +394,7 @@ deps=
 ignore_outcome=true
 
 [testenv:flake8]
-deps=flake8==3.5.0
+deps=flake8>=3.7,<=3.8
 commands=flake8 .
 basepython=python2