Deprecate Python 3.7, switch to Python 3.11 in CI

.github/workflows/check-style.yml

@@ -20,7 +20,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v3
         with:
-          python-version: 3.8
+          python-version: 3.11
       - uses: isort/isort-action@master
         with:
           isortVersion: "5.10.1"

.github/workflows/run-benchmarks.yml

@@ -15,12 +15,12 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v3
         with:
-          python-version: 3.9
+          python-version: 3.11
       - name: Cache dependencies
         uses: actions/cache@v3
         with:
           path: ~/.cache/pip
-          key: Key-v1-3.9-${{ hashFiles('requirements.txt') }}-${{ hashFiles('requirements-dev.txt') }}
+          key: Key-v1-3.11-${{ hashFiles('requirements.txt') }}-${{ hashFiles('requirements-dev.txt') }}
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip

.github/workflows/run-tests.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ '3.7', '3.8', '3.9', '3.10', '3.11' ]
+        python-version: [ '3.8', '3.9', '3.10', '3.11' ]
     timeout-minutes: 15
     steps:
       - uses: actions/checkout@v3
@@ -52,12 +52,12 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v3
         with:
-          python-version: '3.8'
+          python-version: '3.11'
       - name: Cache dependencies
         uses: actions/cache@v3
         with:
           path: ~/.cache/pip
-          key: Key-v1-3.8-${{ hashFiles('requirements.txt') }}-${{ hashFiles('requirements-dev.txt') }}
+          key: Key-v1-3.11-${{ hashFiles('requirements.txt') }}-${{ hashFiles('requirements-dev.txt') }}
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip setuptools wheel
@@ -74,18 +74,18 @@ jobs:
   codecov_in_develop_mode:
 
     runs-on: ubuntu-latest
-    timeout-minutes: 15
+    timeout-minutes: 20
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python
         uses: actions/setup-python@v3
         with:
-          python-version: '3.8'
+          python-version: '3.11'
       - name: Cache dependencies
         uses: actions/cache@v3
         with:
           path: ~/.cache/pip
-          key: Key-v1-3.8-${{ hashFiles('requirements.txt') }}-${{ hashFiles('requirements-dev.txt') }}
+          key: Key-v1-3.11-${{ hashFiles('requirements.txt') }}-${{ hashFiles('requirements-dev.txt') }}
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip setuptools wheel

.readthedocs.yml

@@ -13,4 +13,4 @@ python:
 build:
    os: ubuntu-22.04
    tools:
-     python: "3.7"
+     python: "3.11"

README.md

@@ -40,7 +40,7 @@ feel free to submit a pull request that adds your project to this list.
 
 ## Installation
 
-Before installing, make sure that your environment has Python 3.7+
+Before installing, make sure that your environment has Python 3.8+
 and [PyTorch](https://pytorch.org/get-started/locally/#start-locally) 1.9.0 or newer. They can be installed either
 natively or with [Anaconda](https://www.anaconda.com/products/individual).
 

docs/conf.py

@@ -73,7 +73,7 @@
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = None
+language = "en"
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.

docs/user/quickstart.md

@@ -4,7 +4,7 @@ This tutorial will teach you how to install `hivemind`, host your own experts an
 
 ## Installation
 
-Just `pip install hivemind` to get the latest release (requires Python 3.7 or newer). 
+Just `pip install hivemind` to get the latest release (requires Python 3.8 or newer). 
 
 You can also install the bleeding edge version from GitHub:
 

hivemind/averaging/matchmaking.py

@@ -3,7 +3,6 @@
 from __future__ import annotations
 
 import asyncio
-import concurrent.futures
 import contextlib
 import random
 from math import isfinite
@@ -168,8 +167,8 @@
                         elif len(self.current_followers) > 0:
                             await self.leader_disband_group()
                         continue
-                except (concurrent.futures.CancelledError, asyncio.CancelledError):
-                    break  # note: this is a compatibility layer for python3.7
+                except asyncio.CancelledError:
+                    break
                 except Exception as e:
                     if not self.assembled_group.done():
                         self.assembled_group.set_exception(e)
@@ -321,8 +320,8 @@
                 ordered_peer_ids=[item.to_bytes() for item in group_info.peer_ids],
                 gathered=group_info.gathered,
             )
-        except (concurrent.futures.CancelledError, asyncio.CancelledError):
-            return  # note: this is a compatibility layer for python3.7
+        except asyncio.CancelledError:
+            return
         except Exception as e:
             logger.exception(e)
             yield averaging_pb2.MessageFromLeader(code=averaging_pb2.INTERNAL_ERROR)
@@ -491,7 +490,7 @@
                     self.update_finished.clear()
                     continue
                 else:
                     raise asyncio.TimeoutError("pop_next_leader was invalidated: re-declared averager in background")
 
             del self.leader_queue[maybe_next_leader]
             self.past_attempts.add((maybe_next_leader, entry.expiration_time))

hivemind/utils/asyncio.py

@@ -84,9 +84,7 @@ async def await_cancelled(awaitable: Awaitable) -> bool:
     try:
         await awaitable
         return False
-    except (asyncio.CancelledError, concurrent.futures.CancelledError):
-        # In Python 3.7, awaiting a cancelled asyncio.Future raises concurrent.futures.CancelledError
-        # instead of asyncio.CancelledError
+    except asyncio.CancelledError:
         return True
     except BaseException:
         logger.exception(f"Exception in {awaitable}:")

hivemind/utils/mpfuture.py

@@ -6,6 +6,7 @@
 import os
 import threading
 import uuid
+from concurrent.futures import InvalidStateError
 from contextlib import nullcontext
 from enum import Enum, auto
 from multiprocessing.reduction import ForkingPickler
@@ -26,15 +27,6 @@
 ALL_STATES = base.PENDING, base.RUNNING, base.FINISHED, base.CANCELLED, base.CANCELLED_AND_NOTIFIED
 TERMINAL_STATES = {base.FINISHED, base.CANCELLED, base.CANCELLED_AND_NOTIFIED}
 
-try:
-    from concurrent.futures import InvalidStateError
-except ImportError:
-    # Python 3.7 doesn't raise concurrent.futures.InvalidStateError for repeating set_result/set_exception calls and
-    # doesn't even define this error. In this module, we simulate the Python 3.8+ behavior,
-    # defining and raising this error if necessary.
-    class InvalidStateError(Exception):
-        """Raised when attempting to change state of a future in a terminal state (e.g. finished)"""
-
 
 class SharedBytes:
     """

requirements-docs.txt

@@ -1,4 +1,4 @@
 recommonmark==0.5.0
 sphinx_rtd_theme==0.4.3
 docutils==0.16
-sphinx==4.2.0
+sphinx==5.0.0

setup.py

@@ -183,9 +183,10 @@ def run(self):
         "Intended Audience :: Science/Research",
         "License :: OSI Approved :: MIT License",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
         "Topic :: Scientific/Engineering",
         "Topic :: Scientific/Engineering :: Mathematics",
         "Topic :: Scientific/Engineering :: Artificial Intelligence",

tests/test_util_modules.py

@@ -528,8 +528,7 @@ async def coro():
             async with enter_asynchronously(lock2):
                 await asyncio.sleep(1e-2)
 
-    num_coros = max(100, mp.cpu_count() * 5 + 1)
-    # note: if we deprecate py3.7, this can be reduced to max(33, cpu + 5); see https://bugs.python.org/issue35279
+    num_coros = max(33, mp.cpu_count() * 5 + 1)
     await asyncio.wait({asyncio.create_task(coro()) for _ in range(num_coros)})