Merge pull request #551 from matrix-org/daniel/flake8

Fix flake8 warnings for new flake8

34 files changed, 73 insertions, 66 deletions

diff --git a/setup.cfg b/setup.cfg
index ba027c7d13..e7fc5ffe78 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -16,3 +16,4 @@ ignore =
 
 [flake8]
 max-line-length = 90
+ignore = W503
diff --git a/synapse/api/auth.py b/synapse/api/auth.py
index b5536e8565..c5a2865e26 100644
--- a/synapse/api/auth.py
+++ b/synapse/api/auth.py
@@ -574,7 +574,7 @@ class Auth(object):
             raise AuthError(
                 403,
                 "Application service has not registered this user"
-                )
+            )
         defer.returnValue(user_id)
 
     @defer.inlineCallbacks
diff --git a/synapse/app/__init__.py b/synapse/app/__init__.py
index bfebb0f644..1bc4279807 100644
--- a/synapse/app/__init__.py
+++ b/synapse/app/__init__.py
@@ -12,3 +12,22 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+import sys
+sys.dont_write_bytecode = True
+
+from synapse.python_dependencies import (
+    check_requirements, MissingRequirementError
+)  # NOQA
+
+try:
+    check_requirements()
+except MissingRequirementError as e:
+    message = "\n".join([
+        "Missing Requirement: %s" % (e.message,),
+        "To install run:",
+        "    pip install --upgrade --force \"%s\"" % (e.dependency,),
+        "",
+    ])
+    sys.stderr.writelines(message)
+    sys.exit(1)
diff --git a/synapse/app/homeserver.py b/synapse/app/homeserver.py
index e5066c48ef..c3066d6a0d 100755
--- a/synapse/app/homeserver.py
+++ b/synapse/app/homeserver.py
@@ -14,27 +14,22 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import synapse
+
+import contextlib
+import logging
+import os
+import re
+import resource
+import subprocess
 import sys
-from synapse.rest import ClientRestResource
+import time
 
-sys.dont_write_bytecode = True
 from synapse.python_dependencies import (
-    check_requirements, DEPENDENCY_LINKS, MissingRequirementError
+    check_requirements, DEPENDENCY_LINKS
 )
 
-if __name__ == '__main__':
-    try:
-        check_requirements()
-    except MissingRequirementError as e:
-        message = "\n".join([
-            "Missing Requirement: %s" % (e.message,),
-            "To install run:",
-            "    pip install --upgrade --force \"%s\"" % (e.dependency,),
-            "",
-        ])
-        sys.stderr.writelines(message)
-        sys.exit(1)
-
+from synapse.rest import ClientRestResource
 from synapse.storage.engines import create_engine, IncorrectDatabaseSetup
 from synapse.storage import are_all_users_on_domain
 from synapse.storage.prepare_database import UpgradeDatabaseException
@@ -73,17 +68,6 @@ from synapse import events
 
 from daemonize import Daemonize
 
-import synapse
-
-import contextlib
-import logging
-import os
-import re
-import resource
-import subprocess
-import time
-
-
 logger = logging.getLogger("synapse.app.homeserver")
 
 
diff --git a/synapse/appservice/api.py b/synapse/appservice/api.py
index e1c07028e8..bc90605324 100644
--- a/synapse/appservice/api.py
+++ b/synapse/appservice/api.py
@@ -29,7 +29,7 @@ class ApplicationServiceApi(SimpleHttpClient):
     pushing.
     """
 
-    def __init__(self,  hs):
+    def __init__(self, hs):
         super(ApplicationServiceApi, self).__init__(hs)
         self.clock = hs.get_clock()
 
diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py
index c6259f9dc8..e30e2da58d 100644
--- a/synapse/federation/federation_client.py
+++ b/synapse/federation/federation_client.py
@@ -57,7 +57,7 @@ class FederationClient(FederationBase):
             cache_name="get_pdu_cache",
             clock=self._clock,
             max_len=1000,
-            expiry_ms=120*1000,
+            expiry_ms=120 * 1000,
             reset_expiry_on_get=False,
         )
 
diff --git a/synapse/handlers/_base.py b/synapse/handlers/_base.py
index 744a9ee507..1423df6cf3 100644
--- a/synapse/handlers/_base.py
+++ b/synapse/handlers/_base.py
@@ -147,7 +147,7 @@ class BaseHandler(object):
         )
         if not allowed:
             raise LimitExceededError(
-                retry_after_ms=int(1000*(time_allowed - time_now)),
+                retry_after_ms=int(1000 * (time_allowed - time_now)),
             )
 
     @defer.inlineCallbacks
diff --git a/synapse/handlers/directory.py b/synapse/handlers/directory.py
index 691564c651..4efecb1ffd 100644
--- a/synapse/handlers/directory.py
+++ b/synapse/handlers/directory.py
@@ -175,8 +175,8 @@ class DirectoryHandler(BaseHandler):
         # If this server is in the list of servers, return it first.
         if self.server_name in servers:
             servers = (
-                [self.server_name]
-                + [s for s in servers if s != self.server_name]
+                [self.server_name] +
+                [s for s in servers if s != self.server_name]
             )
         else:
             servers = list(servers)
diff --git a/synapse/handlers/events.py b/synapse/handlers/events.py
index 254b483da6..5ad8f3779a 100644
--- a/synapse/handlers/events.py
+++ b/synapse/handlers/events.py
@@ -130,7 +130,7 @@ class EventStreamHandler(BaseHandler):
 
                 # Add some randomness to this value to try and mitigate against
                 # thundering herds on restart.
-                timeout = random.randint(int(timeout*0.9), int(timeout*1.1))
+                timeout = random.randint(int(timeout * 0.9), int(timeout * 1.1))
 
             events, tokens = yield self.notifier.get_events_for(
                 auth_user, pagin_config, timeout,
diff --git a/synapse/handlers/presence.py b/synapse/handlers/presence.py
index d36eb3b8d7..d0c21ff5c9 100644
--- a/synapse/handlers/presence.py
+++ b/synapse/handlers/presence.py
@@ -34,7 +34,7 @@ metrics = synapse.metrics.get_metrics_for(__name__)
 
 
 # Don't bother bumping "last active" time if it differs by less than 60 seconds
-LAST_ACTIVE_GRANULARITY = 60*1000
+LAST_ACTIVE_GRANULARITY = 60 * 1000
 
 # Keep no more than this number of offline serial revisions
 MAX_OFFLINE_SERIALS = 1000
diff --git a/synapse/handlers/register.py b/synapse/handlers/register.py
index abd1a16a41..b8fbcf9233 100644
--- a/synapse/handlers/register.py
+++ b/synapse/handlers/register.py
@@ -213,7 +213,7 @@ class RegistrationHandler(BaseHandler):
                 400,
                 "User ID must only contain characters which do not"
                 " require URL encoding."
-                )
+            )
         user = UserID(localpart, self.hs.hostname)
         user_id = user.to_string()
 
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index 799221c198..088b76d237 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -927,7 +927,7 @@ class RoomContextHandler(BaseHandler):
         Returns:
             dict, or None if the event isn't found
         """
-        before_limit = math.floor(limit/2.)
+        before_limit = math.floor(limit / 2.)
         after_limit = limit - before_limit
 
         now_token = yield self.hs.get_event_sources().get_current_token()
diff --git a/synapse/http/matrixfederationclient.py b/synapse/http/matrixfederationclient.py
index da13e32e78..c3589534f8 100644
--- a/synapse/http/matrixfederationclient.py
+++ b/synapse/http/matrixfederationclient.py
@@ -152,7 +152,7 @@ class MatrixFederationHttpClient(object):
 
                         return self.clock.time_bound_deferred(
                             request_deferred,
-                            time_out=timeout/1000. if timeout else 60,
+                            time_out=timeout / 1000. if timeout else 60,
                         )
 
                     response = yield preserve_context_over_fn(
diff --git a/synapse/notifier.py b/synapse/notifier.py
index 29965a9ab5..1a90bd55cd 100644
--- a/synapse/notifier.py
+++ b/synapse/notifier.py
@@ -308,7 +308,7 @@ class Notifier(object):
             def timed_out():
                 if listener:
                     listener.deferred.cancel()
-            timer = self.clock.call_later(timeout/1000., timed_out)
+            timer = self.clock.call_later(timeout / 1000., timed_out)
 
             prev_token = from_token
             while not result:
diff --git a/synapse/push/push_rule_evaluator.py b/synapse/push/push_rule_evaluator.py
index dca018af95..2a2b4437dc 100644
--- a/synapse/push/push_rule_evaluator.py
+++ b/synapse/push/push_rule_evaluator.py
@@ -304,7 +304,7 @@ def _flatten_dict(d, prefix=[], result={}):
         if isinstance(value, basestring):
             result[".".join(prefix + [key])] = value.lower()
         elif hasattr(value, "items"):
-            _flatten_dict(value, prefix=(prefix+[key]), result=result)
+            _flatten_dict(value, prefix=(prefix + [key]), result=result)
 
     return result
 
diff --git a/synapse/rest/client/v1/login.py b/synapse/rest/client/v1/login.py
index 07836709fb..7199113dac 100644
--- a/synapse/rest/client/v1/login.py
+++ b/synapse/rest/client/v1/login.py
@@ -89,7 +89,7 @@ class LoginRestServlet(ClientV1RestServlet):
                                          LoginRestServlet.SAML2_TYPE):
                 relay_state = ""
                 if "relay_state" in login_submission:
-                    relay_state = "&RelayState="+urllib.quote(
+                    relay_state = "&RelayState=" + urllib.quote(
                                   login_submission["relay_state"])
                 result = {
                     "uri": "%s%s" % (self.idp_redirect_url, relay_state)
diff --git a/synapse/rest/client/v1/pusher.py b/synapse/rest/client/v1/pusher.py
index e218ed215c..5547f1b112 100644
--- a/synapse/rest/client/v1/pusher.py
+++ b/synapse/rest/client/v1/pusher.py
@@ -52,7 +52,7 @@ class PusherRestServlet(ClientV1RestServlet):
             if i not in content:
                 missing.append(i)
         if len(missing):
-            raise SynapseError(400, "Missing parameters: "+','.join(missing),
+            raise SynapseError(400, "Missing parameters: " + ','.join(missing),
                                errcode=Codes.MISSING_PARAM)
 
         logger.debug("set pushkey %s to kind %s", content['pushkey'], content['kind'])
@@ -83,7 +83,7 @@ class PusherRestServlet(ClientV1RestServlet):
                 data=content['data']
             )
         except PusherConfigException as pce:
-            raise SynapseError(400, "Config Error: "+pce.message,
+            raise SynapseError(400, "Config Error: " + pce.message,
                                errcode=Codes.MISSING_PARAM)
 
         defer.returnValue((200, {}))
diff --git a/synapse/rest/client/v1/register.py b/synapse/rest/client/v1/register.py
index 5378a9a938..2bfd4d96bf 100644
--- a/synapse/rest/client/v1/register.py
+++ b/synapse/rest/client/v1/register.py
@@ -38,7 +38,8 @@ logger = logging.getLogger(__name__)
 if hasattr(hmac, "compare_digest"):
     compare_digest = hmac.compare_digest
 else:
-    compare_digest = lambda a, b: a == b
+    def compare_digest(a, b):
+        return a == b
 
 
 class RegisterRestServlet(ClientV1RestServlet):
diff --git a/synapse/rest/client/v2_alpha/register.py b/synapse/rest/client/v2_alpha/register.py
index 5d50dd9e3d..56a5bbec30 100644
--- a/synapse/rest/client/v2_alpha/register.py
+++ b/synapse/rest/client/v2_alpha/register.py
@@ -34,7 +34,8 @@ from synapse.util.async import run_on_reactor
 if hasattr(hmac, "compare_digest"):
     compare_digest = hmac.compare_digest
 else:
-    compare_digest = lambda a, b: a == b
+    def compare_digest(a, b):
+        return a == b
 
 
 logger = logging.getLogger(__name__)
diff --git a/synapse/rest/client/versions.py b/synapse/rest/client/versions.py
index 349ef6b396..ca5468c402 100644
--- a/synapse/rest/client/versions.py
+++ b/synapse/rest/client/versions.py
@@ -26,9 +26,7 @@ class VersionsRestServlet(RestServlet):
 
     def on_GET(self, request):
         return (200, {
-            "versions": [
-                "r0.0.1",
-            ]
+            "versions": ["r0.0.1"]
         })
 
 
diff --git a/synapse/server.py b/synapse/server.py
index 5fee7fe130..368d615576 100644
--- a/synapse/server.py
+++ b/synapse/server.py
@@ -23,7 +23,7 @@ from twisted.web.client import BrowserLikePolicyForHTTPS
 from twisted.enterprise import adbapi
 
 from synapse.federation import initialize_http_replication
-from synapse.http.client import SimpleHttpClient,  InsecureInterceptableContextFactory
+from synapse.http.client import SimpleHttpClient, InsecureInterceptableContextFactory
 from synapse.notifier import Notifier
 from synapse.api.auth import Auth
 from synapse.handlers import Handlers
diff --git a/synapse/state.py b/synapse/state.py
index 0acf309fe0..b9a1387520 100644
--- a/synapse/state.py
+++ b/synapse/state.py
@@ -63,7 +63,7 @@ class StateHandler(object):
             cache_name="state_cache",
             clock=self.clock,
             max_len=SIZE_OF_CACHE,
-            expiry_ms=EVICTION_TIMEOUT_SECONDS*1000,
+            expiry_ms=EVICTION_TIMEOUT_SECONDS * 1000,
             reset_expiry_on_get=True,
         )
 
diff --git a/synapse/storage/__init__.py b/synapse/storage/__init__.py
index c91c7a3729..5a9e7720d9 100644
--- a/synapse/storage/__init__.py
+++ b/synapse/storage/__init__.py
@@ -59,7 +59,7 @@ logger = logging.getLogger(__name__)
 # Number of msec of granularity to store the user IP 'last seen' time. Smaller
 # times give more inserts into the database even for readonly API hits
 # 120 seconds == 2 minutes
-LAST_SEEN_GRANULARITY = 120*1000
+LAST_SEEN_GRANULARITY = 120 * 1000
 
 
 class DataStore(RoomMemberStore, RoomStore,
diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index 5e77320540..cfb87d9328 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -185,7 +185,7 @@ class SQLBaseStore(object):
             time_then = self._previous_loop_ts
             self._previous_loop_ts = time_now
 
-            ratio = (curr - prev)/(time_now - time_then)
+            ratio = (curr - prev) / (time_now - time_then)
 
             top_three_counters = self._txn_perf_counters.interval(
                 time_now - time_then, limit=3
@@ -643,7 +643,10 @@ class SQLBaseStore(object):
         if not iterable:
             defer.returnValue(results)
 
-        chunks = [iterable[i:i+batch_size] for i in xrange(0, len(iterable), batch_size)]
+        chunks = [
+            iterable[i:i + batch_size]
+            for i in xrange(0, len(iterable), batch_size)
+        ]
         for chunk in chunks:
             rows = yield self.runInteraction(
                 desc,
diff --git a/synapse/storage/engines/sqlite3.py b/synapse/storage/engines/sqlite3.py
index 400c10103c..91fac33b8b 100644
--- a/synapse/storage/engines/sqlite3.py
+++ b/synapse/storage/engines/sqlite3.py
@@ -54,7 +54,7 @@ class Sqlite3Engine(object):
 
 def _parse_match_info(buf):
     bufsize = len(buf)
-    return [struct.unpack('@I', buf[i:i+4])[0] for i in range(0, bufsize, 4)]
+    return [struct.unpack('@I', buf[i:i + 4])[0] for i in range(0, bufsize, 4)]
 
 
 def _rank(raw_match_info):
diff --git a/synapse/storage/event_federation.py b/synapse/storage/event_federation.py
index 5f32eec6f8..ce2c794025 100644
--- a/synapse/storage/event_federation.py
+++ b/synapse/storage/event_federation.py
@@ -58,7 +58,7 @@ class EventFederationStore(SQLBaseStore):
             new_front = set()
             front_list = list(front)
             chunks = [
-                front_list[x:x+100]
+                front_list[x:x + 100]
                 for x in xrange(0, len(front), 100)
             ]
             for chunk in chunks:
diff --git a/synapse/storage/events.py b/synapse/storage/events.py
index 5e85552029..4d7cdd00d0 100644
--- a/synapse/storage/events.py
+++ b/synapse/storage/events.py
@@ -84,7 +84,7 @@ class EventsStore(SQLBaseStore):
                 event.internal_metadata.stream_ordering = stream
 
             chunks = [
-                events_and_contexts[x:x+100]
+                events_and_contexts[x:x + 100]
                 for x in xrange(0, len(events_and_contexts), 100)
             ]
 
@@ -740,7 +740,7 @@ class EventsStore(SQLBaseStore):
         rows = []
         N = 200
         for i in range(1 + len(events) / N):
-            evs = events[i*N:(i + 1)*N]
+            evs = events[i * N:(i + 1) * N]
             if not evs:
                 break
 
@@ -755,7 +755,7 @@ class EventsStore(SQLBaseStore):
                 " LEFT JOIN rejections as rej USING (event_id)"
                 " LEFT JOIN redactions as r ON e.event_id = r.redacts"
                 " WHERE e.event_id IN (%s)"
-            ) % (",".join(["?"]*len(evs)),)
+            ) % (",".join(["?"] * len(evs)),)
 
             txn.execute(sql, evs)
             rows.extend(self.cursor_to_dict(txn))
diff --git a/synapse/storage/stream.py b/synapse/storage/stream.py
index 338a9d40d5..2c49a5e499 100644
--- a/synapse/storage/stream.py
+++ b/synapse/storage/stream.py
@@ -168,7 +168,7 @@ class StreamStore(SQLBaseStore):
 
         results = {}
         room_ids = list(room_ids)
-        for rm_ids in (room_ids[i:i+20] for i in xrange(0, len(room_ids), 20)):
+        for rm_ids in (room_ids[i:i + 20] for i in xrange(0, len(room_ids), 20)):
             res = yield defer.gatherResults([
                 self.get_room_events_stream_for_room(
                     room_id, from_key, to_key, limit
diff --git a/synapse/util/__init__.py b/synapse/util/__init__.py
index f1fe963adf..7566d9eb33 100644
--- a/synapse/util/__init__.py
+++ b/synapse/util/__init__.py
@@ -46,7 +46,7 @@ class Clock(object):
 
     def looping_call(self, f, msec):
         l = task.LoopingCall(f)
-        l.start(msec/1000.0, now=False)
+        l.start(msec / 1000.0, now=False)
         return l
 
     def stop_looping_call(self, loop):
diff --git a/synapse/util/caches/descriptors.py b/synapse/util/caches/descriptors.py
index 88e56e3302..e27917c63a 100644
--- a/synapse/util/caches/descriptors.py
+++ b/synapse/util/caches/descriptors.py
@@ -149,7 +149,7 @@ class CacheDescriptor(object):
         self.lru = lru
         self.tree = tree
 
-        self.arg_names = inspect.getargspec(orig).args[1:num_args+1]
+        self.arg_names = inspect.getargspec(orig).args[1:num_args + 1]
 
         if len(self.arg_names) < self.num_args:
             raise Exception(
@@ -250,7 +250,7 @@ class CacheListDescriptor(object):
         self.num_args = num_args
         self.list_name = list_name
 
-        self.arg_names = inspect.getargspec(orig).args[1:num_args+1]
+        self.arg_names = inspect.getargspec(orig).args[1:num_args + 1]
         self.list_pos = self.arg_names.index(self.list_name)
 
         self.cache = cache
diff --git a/synapse/util/caches/expiringcache.py b/synapse/util/caches/expiringcache.py
index 494226f5ea..62cae99649 100644
--- a/synapse/util/caches/expiringcache.py
+++ b/synapse/util/caches/expiringcache.py
@@ -55,7 +55,7 @@ class ExpiringCache(object):
         def f():
             self._prune_cache()
 
-        self._clock.looping_call(f, self._expiry_ms/2)
+        self._clock.looping_call(f, self._expiry_ms / 2)
 
     def __setitem__(self, key, value):
         now = self._clock.time_msec()
diff --git a/synapse/util/caches/treecache.py b/synapse/util/caches/treecache.py
index 29d02f7e95..03bc1401b7 100644
--- a/synapse/util/caches/treecache.py
+++ b/synapse/util/caches/treecache.py
@@ -58,7 +58,7 @@ class TreeCache(object):
 
             if n:
                 break
-            node_and_keys[i+1][0].pop(k)
+            node_and_keys[i + 1][0].pop(k)
 
         popped, cnt = _strip_and_count_entires(popped)
         self.size -= cnt
diff --git a/synapse/util/logutils.py b/synapse/util/logutils.py
index d5b1a37eff..c37a157787 100644
--- a/synapse/util/logutils.py
+++ b/synapse/util/logutils.py
@@ -111,7 +111,7 @@ def time_function(f):
             _log_debug_as_f(
                 f,
                 "[FUNC END] {%s-%d} %f",
-                (func_name, id, end-start,),
+                (func_name, id, end - start,),
             )
 
         return r
diff --git a/synapse/util/ratelimitutils.py b/synapse/util/ratelimitutils.py
index c37d6f12e3..ea321bc6a9 100644
--- a/synapse/util/ratelimitutils.py
+++ b/synapse/util/ratelimitutils.py
@@ -163,7 +163,7 @@ class _PerHostRatelimiter(object):
                 "Ratelimit [%s]: sleeping req",
                 id(request_id),
             )
-            ret_defer = sleep(self.sleep_msec/1000.0)
+            ret_defer = sleep(self.sleep_msec / 1000.0)
 
             self.sleeping_requests.add(request_id)