bpo-38148: Add slots to asyncio transports (GH-16077)
* bpo-38148: Add slots to asyncio transports
* Update Misc/NEWS.d/next/Library/2019-09-13-08-55-43.bpo-38148.Lnww6D.rst
Co-Authored-By: Kyle Stanley <aeros167@gmail.com>
diff --git a/Lib/asyncio/transports.py b/Lib/asyncio/transports.py
index 47b37fa..513b1c0 100644
--- a/Lib/asyncio/transports.py
+++ b/Lib/asyncio/transports.py
@@ -9,6 +9,8 @@
class BaseTransport:
"""Base class for transports."""
+ __slots__ = ('_extra',)
+
def __init__(self, extra=None):
if extra is None:
extra = {}
@@ -44,6 +46,8 @@
class ReadTransport(BaseTransport):
"""Interface for read-only transports."""
+ __slots__ = ()
+
def is_reading(self):
"""Return True if the transport is receiving."""
raise NotImplementedError
@@ -68,6 +72,8 @@
class WriteTransport(BaseTransport):
"""Interface for write-only transports."""
+ __slots__ = ()
+
def set_write_buffer_limits(self, high=None, low=None):
"""Set the high- and low-water limits for write flow control.
@@ -154,10 +160,14 @@
except writelines(), which calls write() in a loop.
"""
+ __slots__ = ()
+
class DatagramTransport(BaseTransport):
"""Interface for datagram (UDP) transports."""
+ __slots__ = ()
+
def sendto(self, data, addr=None):
"""Send data to the transport.
@@ -180,6 +190,8 @@
class SubprocessTransport(BaseTransport):
+ __slots__ = ()
+
def get_pid(self):
"""Get subprocess id."""
raise NotImplementedError
@@ -247,6 +259,8 @@
resume_writing() may be called.
"""
+ __slots__ = ('_loop', '_protocol_paused', '_high_water', '_low_water')
+
def __init__(self, extra=None, loop=None):
super().__init__(extra)
assert loop is not None