[pyupgrade] synapse/ (#10348)

This PR is tantamount to running 
```
pyupgrade --py36-plus --keep-percent-format `find synapse/ -type f -name "*.py"`
```

Part of #9744

changelog.d/10348.misc

@@ -0,0 +1 @@
+Run `pyupgrade` on the codebase.

synapse/app/generic_worker.py

@@ -395,10 +395,8 @@ def start_listening(self):
             elif listener.type == "metrics":
                 if not self.config.enable_metrics:
                     logger.warning(
-                        (
-                            "Metrics listener configured, but "
-                            "enable_metrics is not True!"
-                        )
+                        "Metrics listener configured, but "
+                        "enable_metrics is not True!"
                     )
                 else:
                     _base.listen_metrics(listener.bind_addresses, listener.port)

synapse/app/homeserver.py

@@ -305,10 +305,8 @@ def start_listening(self):
             elif listener.type == "metrics":
                 if not self.config.enable_metrics:
                     logger.warning(
-                        (
-                            "Metrics listener configured, but "
-                            "enable_metrics is not True!"
-                        )
+                        "Metrics listener configured, but "
+                        "enable_metrics is not True!"
                     )
                 else:
                     _base.listen_metrics(listener.bind_addresses, listener.port)

synapse/config/appservice.py

@@ -64,7 +64,7 @@ def load_appservices(hostname, config_files):
 
     for config_file in config_files:
         try:
-            with open(config_file, "r") as f:
+            with open(config_file) as f:
                 appservice = _load_appservice(hostname, yaml.safe_load(f), config_file)
                 if appservice.id in seen_ids:
                     raise ConfigError(

synapse/config/tls.py

@@ -66,10 +66,8 @@ def read_config(self, config: dict, config_dir_path: str, **kwargs):
         if self.federation_client_minimum_tls_version == "1.3":
             if getattr(SSL, "OP_NO_TLSv1_3", None) is None:
                 raise ConfigError(
-                    (
-                        "federation_client_minimum_tls_version cannot be 1.3, "
-                        "your OpenSSL does not support it"
-                    )
+                    "federation_client_minimum_tls_version cannot be 1.3, "
+                    "your OpenSSL does not support it"
                 )
 
         # Whitelist of domains to not verify certificates for

synapse/handlers/cas.py

@@ -40,7 +40,7 @@ def __init__(self, error, error_description=None):
 
     def __str__(self):
         if self.error_description:
-            return "{}: {}".format(self.error, self.error_description)
+            return f"{self.error}: {self.error_description}"
         return self.error
 
 

synapse/handlers/federation.py

@@ -735,7 +735,7 @@ async def _get_state_after_missing_prev_event(
         # we need to make sure we re-load from the database to get the rejected
         # state correct.
         fetched_events.update(
-            (await self.store.get_events(missing_desired_events, allow_rejected=True))
+            await self.store.get_events(missing_desired_events, allow_rejected=True)
         )
 
         # check for events which were in the wrong room.

synapse/handlers/identity.py

@@ -302,7 +302,7 @@ async def try_unbind_threepid_with_id_server(
             )
 
         url = "https://%s/_matrix/identity/api/v1/3pid/unbind" % (id_server,)
-        url_bytes = "/_matrix/identity/api/v1/3pid/unbind".encode("ascii")
+        url_bytes = b"/_matrix/identity/api/v1/3pid/unbind"
 
         content = {
             "mxid": mxid,
@@ -695,7 +695,7 @@ async def _lookup_3pid_v1(
                 return data["mxid"]
         except RequestTimedOutError:
             raise SynapseError(500, "Timed out contacting identity server")
-        except IOError as e:
+        except OSError as e:
             logger.warning("Error from v1 identity server lookup: %s" % (e,))
 
         return None

synapse/handlers/oidc.py

@@ -72,26 +72,26 @@
     (b"oidc_session_no_samesite", b"HttpOnly"),
 ]
 
+
 #: A token exchanged from the token endpoint, as per RFC6749 sec 5.1. and
 #: OpenID.Core sec 3.1.3.3.
-Token = TypedDict(
-    "Token",
-    {
-        "access_token": str,
-        "token_type": str,
-        "id_token": Optional[str],
-        "refresh_token": Optional[str],
-        "expires_in": int,
-        "scope": Optional[str],
-    },
-)
+class Token(TypedDict):
+    access_token: str
+    token_type: str
+    id_token: Optional[str]
+    refresh_token: Optional[str]
+    expires_in: int
+    scope: Optional[str]
+
 
 #: A JWK, as per RFC7517 sec 4. The type could be more precise than that, but
 #: there is no real point of doing this in our case.
 JWK = Dict[str, str]
 
+
 #: A JWK Set, as per RFC7517 sec 5.
-JWKS = TypedDict("JWKS", {"keys": List[JWK]})
+class JWKS(TypedDict):
+    keys: List[JWK]
 
 
 class OidcHandler:
@@ -255,7 +255,7 @@ def __init__(self, error, error_description=None):
 
     def __str__(self):
         if self.error_description:
-            return "{}: {}".format(self.error, self.error_description)
+            return f"{self.error}: {self.error_description}"
         return self.error
 
 
@@ -639,7 +639,7 @@ async def _exchange_code(self, code: str) -> Token:
             )
             logger.warning(description)
             # Body was still valid JSON. Might be useful to log it for debugging.
-            logger.warning("Code exchange response: {resp!r}".format(resp=resp))
+            logger.warning("Code exchange response: %r", resp)
             raise OidcError("server_error", description)
 
         return resp
@@ -1217,10 +1217,12 @@ class OidcSessionData:
     ui_auth_session_id = attr.ib(type=str)
 
 
-UserAttributeDict = TypedDict(
-    "UserAttributeDict",
-    {"localpart": Optional[str], "display_name": Optional[str], "emails": List[str]},
-)
+class UserAttributeDict(TypedDict):
+    localpart: Optional[str]
+    display_name: Optional[str]
+    emails: List[str]
+
+
 C = TypeVar("C")
 
 

synapse/handlers/register.py

@@ -55,15 +55,12 @@
     ["guest", "auth_provider"],
 )
 
-LoginDict = TypedDict(
-    "LoginDict",
-    {
-        "device_id": str,
-        "access_token": str,
-        "valid_until_ms": Optional[int],
-        "refresh_token": Optional[str],
-    },
-)
+
+class LoginDict(TypedDict):
+    device_id: str
+    access_token: str
+    valid_until_ms: Optional[int]
+    refresh_token: Optional[str]
 
 
 class RegistrationHandler(BaseHandler):

synapse/handlers/saml.py

@@ -372,7 +372,7 @@ def expire_sessions(self):
 
 
 DOT_REPLACE_PATTERN = re.compile(
-    ("[^%s]" % (re.escape("".join(mxid_localpart_allowed_characters)),))
+    "[^%s]" % (re.escape("".join(mxid_localpart_allowed_characters)),)
 )
 
 

synapse/handlers/sync.py

@@ -1601,7 +1601,7 @@ async def _get_rooms_changed(
             logger.debug(
                 "Membership changes in %s: [%s]",
                 room_id,
-                ", ".join(("%s (%s)" % (e.event_id, e.membership) for e in events)),
+                ", ".join("%s (%s)" % (e.event_id, e.membership) for e in events),
             )
 
             non_joins = [e for e in events if e.membership != Membership.JOIN]

synapse/http/proxyagent.py

@@ -172,7 +172,7 @@ def request(self, method, uri, headers=None, bodyProducer=None):
         """
         uri = uri.strip()
         if not _VALID_URI.match(uri):
-            raise ValueError("Invalid URI {!r}".format(uri))
+            raise ValueError(f"Invalid URI {uri!r}")
 
         parsed_uri = URI.fromBytes(uri)
         pool_key = (parsed_uri.scheme, parsed_uri.host, parsed_uri.port)

synapse/http/site.py

@@ -384,7 +384,7 @@ def _finished_processing(self):
         # authenticated (e.g. and admin is puppetting a user) then we log both.
         requester, authenticated_entity = self.get_authenticated_entity()
         if authenticated_entity:
-            requester = "{}.{}".format(authenticated_entity, requester)
+            requester = f"{authenticated_entity}.{requester}"
 
         self.site.access_logger.log(
             log_level,

synapse/logging/opentracing.py

@@ -374,7 +374,7 @@ def init_tracer(hs: "HomeServer"):
 
     config = JaegerConfig(
         config=hs.config.jaeger_config,
-        service_name="{} {}".format(hs.config.server_name, hs.get_instance_name()),
+        service_name=f"{hs.config.server_name} {hs.get_instance_name()}",
         scope_manager=LogContextScopeManager(hs.config),
         metrics_factory=PrometheusMetricsFactory(),
     )

synapse/metrics/_exposition.py

@@ -34,7 +34,7 @@
 
 from synapse.util import caches
 
-CONTENT_TYPE_LATEST = str("text/plain; version=0.0.4; charset=utf-8")
+CONTENT_TYPE_LATEST = "text/plain; version=0.0.4; charset=utf-8"
 
 
 INF = float("inf")
@@ -55,8 +55,8 @@ def floatToGoString(d):
         # Go switches to exponents sooner than Python.
         # We only need to care about positive values for le/quantile.
         if d > 0 and dot > 6:
-            mantissa = "{0}.{1}{2}".format(s[0], s[1:dot], s[dot + 1 :]).rstrip("0.")
-            return "{0}e+0{1}".format(mantissa, dot - 1)
+            mantissa = f"{s[0]}.{s[1:dot]}{s[dot + 1 :]}".rstrip("0.")
+            return f"{mantissa}e+0{dot - 1}"
         return s
 
 
@@ -65,7 +65,7 @@ def sample_line(line, name):
         labelstr = "{{{0}}}".format(
             ",".join(
                 [
-                    '{0}="{1}"'.format(
+                    '{}="{}"'.format(
                         k,
                         v.replace("\\", r"\\").replace("\n", r"\n").replace('"', r"\""),
                     )
@@ -78,10 +78,8 @@ def sample_line(line, name):
     timestamp = ""
     if line.timestamp is not None:
         # Convert to milliseconds.
-        timestamp = " {0:d}".format(int(float(line.timestamp) * 1000))
-    return "{0}{1} {2}{3}\n".format(
-        name, labelstr, floatToGoString(line.value), timestamp
-    )
+        timestamp = f" {int(float(line.timestamp) * 1000):d}"
+    return "{}{} {}{}\n".format(name, labelstr, floatToGoString(line.value), timestamp)
 
 
 def generate_latest(registry, emit_help=False):
@@ -118,12 +116,12 @@ def generate_latest(registry, emit_help=False):
         # Output in the old format for compatibility.
         if emit_help:
             output.append(
-                "# HELP {0} {1}\n".format(
+                "# HELP {} {}\n".format(
                     mname,
                     metric.documentation.replace("\\", r"\\").replace("\n", r"\n"),
                 )
             )
-        output.append("# TYPE {0} {1}\n".format(mname, mtype))
+        output.append(f"# TYPE {mname} {mtype}\n")
 
         om_samples: Dict[str, List[str]] = {}
         for s in metric.samples:
@@ -143,13 +141,13 @@ def generate_latest(registry, emit_help=False):
         for suffix, lines in sorted(om_samples.items()):
             if emit_help:
                 output.append(
-                    "# HELP {0}{1} {2}\n".format(
+                    "# HELP {}{} {}\n".format(
                         metric.name,
                         suffix,
                         metric.documentation.replace("\\", r"\\").replace("\n", r"\n"),
                     )
                 )
-            output.append("# TYPE {0}{1} gauge\n".format(metric.name, suffix))
+            output.append(f"# TYPE {metric.name}{suffix} gauge\n")
             output.extend(lines)
 
         # Get rid of the weird colon things while we're at it
@@ -163,12 +161,12 @@ def generate_latest(registry, emit_help=False):
         # Also output in the new format, if it's different.
         if emit_help:
             output.append(
-                "# HELP {0} {1}\n".format(
+                "# HELP {} {}\n".format(
                     mnewname,
                     metric.documentation.replace("\\", r"\\").replace("\n", r"\n"),
                 )
             )
-        output.append("# TYPE {0} {1}\n".format(mnewname, mtype))
+        output.append(f"# TYPE {mnewname} {mtype}\n")
 
         for s in metric.samples:
             # Get rid of the OpenMetrics specific samples (we should already have

synapse/metrics/background_process_metrics.py

@@ -137,8 +137,7 @@ def collect(self):
             _background_process_db_txn_duration,
             _background_process_db_sched_duration,
         ):
-            for r in m.collect():
-                yield r
+            yield from m.collect()
 
 
 REGISTRY.register(_Collector())

synapse/rest/client/v1/login.py

@@ -44,19 +44,14 @@
 logger = logging.getLogger(__name__)
 
 
-LoginResponse = TypedDict(
-    "LoginResponse",
-    {
-        "user_id": str,
-        "access_token": str,
-        "home_server": str,
-        "expires_in_ms": Optional[int],
-        "refresh_token": Optional[str],
-        "device_id": str,
-        "well_known": Optional[Dict[str, Any]],
-    },
-    total=False,
-)
+class LoginResponse(TypedDict, total=False):
+    user_id: str
+    access_token: str
+    home_server: str
+    expires_in_ms: Optional[int]
+    refresh_token: Optional[str]
+    device_id: str
+    well_known: Optional[Dict[str, Any]]
 
 
 class LoginRestServlet(RestServlet):
@@ -150,9 +145,7 @@ def on_GET(self, request: SynapseRequest):
             # login flow types returned.
             flows.append({"type": LoginRestServlet.TOKEN_TYPE})
 
-        flows.extend(
-            ({"type": t} for t in self.auth_handler.get_supported_login_types())
-        )
+        flows.extend({"type": t} for t in self.auth_handler.get_supported_login_types())
 
         flows.append({"type": LoginRestServlet.APPSERVICE_TYPE})
 

synapse/rest/media/v1/__init__.py

@@ -17,7 +17,7 @@
 # check for JPEG support.
 try:
     PIL.Image._getdecoder("rgb", "jpeg", None)
-except IOError as e:
+except OSError as e:
     if str(e).startswith("decoder jpeg not available"):
         raise Exception(
             "FATAL: jpeg codec not supported. Install pillow correctly! "
@@ -32,7 +32,7 @@
 # check for PNG support.
 try:
     PIL.Image._getdecoder("rgb", "zip", None)
-except IOError as e:
+except OSError as e:
     if str(e).startswith("decoder zip not available"):
         raise Exception(
             "FATAL: zip codec not supported. Install pillow correctly! "

synapse/storage/database.py

@@ -907,7 +907,7 @@ def simple_insert_many_txn(
         # The sort is to ensure that we don't rely on dictionary iteration
         # order.
         keys, vals = zip(
-            *[zip(*(sorted(i.items(), key=lambda kv: kv[0]))) for i in values if i]
+            *(zip(*(sorted(i.items(), key=lambda kv: kv[0]))) for i in values if i)
         )
 
         for k in keys: