Add slots and -> None to __init__ in classes

docs-requirements.txt

@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile with Python 3.8
+# This file is autogenerated by pip-compile with Python 3.11
 # by the following command:
 #
 #    pip-compile docs-requirements.in
@@ -40,10 +40,6 @@ imagesize==1.4.1
     # via sphinx
 immutables==0.19
     # via -r docs-requirements.in
-importlib-metadata==6.8.0
-    # via sphinx
-importlib-resources==6.0.0
-    # via towncrier
 incremental==22.10.0
     # via towncrier
 jinja2==3.0.3
@@ -63,8 +59,6 @@ pygments==2.15.1
     # via sphinx
 pyopenssl==23.2.0
     # via -r docs-requirements.in
-pytz==2023.3
-    # via babel
 requests==2.31.0
     # via sphinx
 sniffio==1.3.0
@@ -99,13 +93,7 @@ sphinxcontrib-serializinghtml==1.1.5
     # via sphinx
 sphinxcontrib-trio==1.1.2
     # via -r docs-requirements.in
-tomli==2.0.1
-    # via towncrier
 towncrier==23.6.0
     # via -r docs-requirements.in
 urllib3==2.0.4
     # via requests
-zipp==3.16.2
-    # via
-    #   importlib-metadata
-    #   importlib-resources

test-requirements.txt

@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile with Python 3.8
+# This file is autogenerated by pip-compile with Python 3.11
 # by the following command:
 #
 #    pip-compile test-requirements.in
@@ -42,10 +42,6 @@ decorator==5.1.1
     # via ipython
 dill==0.3.7
     # via pylint
-exceptiongroup==1.1.2 ; python_version < "3.11"
-    # via
-    #   -r test-requirements.in
-    #   pytest
 executing==1.2.0
     # via stack-data
 flake8==6.1.0
@@ -163,11 +159,7 @@ types-pyopenssl==23.2.0.2 ; implementation_name == "cpython"
 typing-extensions==4.7.1
     # via
     #   -r test-requirements.in
-    #   astroid
-    #   black
-    #   ipython
     #   mypy
-    #   pylint
 wcwidth==0.2.6
     # via prompt-toolkit
 wheel==0.41.0

trio/_dtls.py

@@ -102,6 +102,7 @@ class HandshakeType(enum.IntEnum):
 
 
 class ProtocolVersion:
+    __slots__ = ()
     DTLS10 = bytes([254, 255])
     DTLS12 = bytes([254, 253])
 
@@ -115,7 +116,7 @@ class ProtocolVersion:
 #   network cannot *only* cause BadPacket to be raised. No IndexError or
 #   struct.error or whatever.
 class BadPacket(Exception):
-    pass
+    __slots__ = ()
 
 
 # This checks that the DTLS 'epoch' field is 0, which is true iff we're in the
@@ -406,6 +407,8 @@ def decode_volley_trusted(
 
 
 class RecordEncoder:
+    __slots__ = ("_record_seq",)
+
     def __init__(self) -> None:
         self._record_seq = count()
 
@@ -648,7 +651,9 @@ def challenge_for(
 
 
 class _Queue(Generic[_T]):
-    def __init__(self, incoming_packets_buffer: int | float):
+    __slots__ = ("s", "r")
+
+    def __init__(self, incoming_packets_buffer: int | float) -> None:
         self.s, self.r = trio.open_memory_channel[_T](incoming_packets_buffer)
 
 
@@ -828,7 +833,26 @@ class DTLSChannel(trio.abc.Channel[bytes], metaclass=NoPublicConstructor):
 
     """
 
-    def __init__(self, endpoint: DTLSEndpoint, peer_address: Address, ctx: Context):
+    __slots__ = (
+        "endpoint",
+        "peer_address",
+        "_packets_dropped_in_trio",
+        "_client_hello",
+        "_did_handshake",
+        "_ssl",
+        "_handshake_mtu",
+        "_replaced",
+        "_closed",
+        "_q",
+        "_handshake_lock",
+        "_record_encoder",
+        "_final_volley",
+        "__weakref__",
+    )
+
+    def __init__(
+        self, endpoint: DTLSEndpoint, peer_address: Address, ctx: Context
+    ) -> None:
         self.endpoint = endpoint
         self.peer_address = peer_address
         self._packets_dropped_in_trio = 0
@@ -1178,7 +1202,24 @@ class DTLSEndpoint(metaclass=Final):
 
     """
 
-    def __init__(self, socket: _SocketType, *, incoming_packets_buffer: int = 10):
+    __slots__ = (
+        "_initialized",
+        "socket",
+        "incoming_packets_buffer",
+        "_token",
+        "_streams",
+        "_listening_context",
+        "_listening_key",
+        "_incoming_connections_q",
+        "_send_lock",
+        "_closed",
+        "_receive_loop_spawned",
+        "__weakref__",
+    )
+
+    def __init__(
+        self, socket: _SocketType, *, incoming_packets_buffer: int = 10
+    ) -> None:
         # We do this lazily on first construction, so only people who actually use DTLS
         # have to install PyOpenSSL.
         global SSL