chore: remove 3.6 support (#1359)

WilliamBergamin · web-flow · commit d6c0c2f463b7 · 2025-09-09T09:56:26.000-04:00
diff --git a/.github/maintainers_guide.md b/.github/maintainers_guide.md
@@ -25,8 +25,8 @@ $ pyenv local 3.8.5
 
 $ pyenv versions
   system
-  3.6.10
-  3.7.7
+  3.7.17
+  3.13.7
 * 3.8.5 (set by /path-to-bolt-python/.python-version)
 
 $ pyenv rehash
diff --git a/README.md b/README.md
@@ -19,7 +19,7 @@ A Python framework to build Slack apps in a flash with the latest platform featu
 ## Setup
 
 ```bash
-# Python 3.6+ required
+# Python 3.7+ required
 python -m venv .venv
 source .venv/bin/activate
 
@@ -153,7 +153,7 @@ Most of the app's functionality will be inside listener functions (the `fn` para
 If you'd prefer to build your app with [asyncio](https://docs.python.org/3/library/asyncio.html), you can import the [AIOHTTP](https://docs.aiohttp.org/en/stable/) library and call the `AsyncApp` constructor. Within async apps, you can use the async/await pattern.
 
 ```bash
-# Python 3.6+ required
+# Python 3.7+ required
 python -m venv .venv
 source .venv/bin/activate
 
diff --git a/docs/english/building-an-app.md b/docs/english/building-an-app.md
@@ -72,7 +72,7 @@ $ mkdir first-bolt-app
 $ cd first-bolt-app
 ```
 
-Next, we recommend using a [Python virtual environment](https://packaging.python.org/guides/installing-using-pip-and-virtual-environments/#creating-a-virtual-environment) to manage your project's dependencies. This is a great way to prevent conflicts with your system's Python packages. Let's create and activate a new virtual environment with [Python 3.6 or later](https://www.python.org/downloads/):
+Next, we recommend using a [Python virtual environment](https://packaging.python.org/guides/installing-using-pip-and-virtual-environments/#creating-a-virtual-environment) to manage your project's dependencies. This is a great way to prevent conflicts with your system's Python packages. Let's create and activate a new virtual environment with [Python 3.7 or later](https://www.python.org/downloads/):
 
 ```sh
 $ python3 -m venv .venv
diff --git a/docs/english/getting-started.md b/docs/english/getting-started.md
@@ -21,7 +21,7 @@ In search of the complete guide to building an app from scratch? Check out the [
 
 A few tools are needed for the following steps. We recommend using the [**Slack CLI**](/tools/slack-cli/) for the smoothest experience, but other options remain available. 
 
-You can also begin by installing git and downloading [Python 3.6 or later](https://www.python.org/downloads/), or the latest stable version of Python. Refer to [Python's setup and building guide](https://devguide.python.org/getting-started/setup-building/) for more details.
+You can also begin by installing git and downloading [Python 3.7 or later](https://www.python.org/downloads/), or the latest stable version of Python. Refer to [Python's setup and building guide](https://devguide.python.org/getting-started/setup-building/) for more details.
 
 Install the latest version of the Slack CLI to get started:
 
@@ -83,7 +83,7 @@ Outlines of a project are taking shape, so we can move on to running the app!
 </TabItem>
 </Tabs>
 
-We recommend using a [Python virtual environment](https://packaging.python.org/guides/installing-using-pip-and-virtual-environments/#creating-a-virtual-environment) to manage your project's dependencies. This is a great way to prevent conflicts with your system's Python packages. Let's create and activate a new virtual environment with [Python 3.6 or later](https://www.python.org/downloads/):
+We recommend using a [Python virtual environment](https://packaging.python.org/guides/installing-using-pip-and-virtual-environments/#creating-a-virtual-environment) to manage your project's dependencies. This is a great way to prevent conflicts with your system's Python packages. Let's create and activate a new virtual environment with [Python 3.7 or later](https://www.python.org/downloads/):
 
 ```sh
 $ python3 -m venv .venv
diff --git a/docs/english/tutorial/ai-chatbot/ai-chatbot.md b/docs/english/tutorial/ai-chatbot/ai-chatbot.md
@@ -13,7 +13,7 @@ In this tutorial, you'll learn how to bring the power of AI into your Slack work
 Before getting started, you will need the following:
 
 * a development workspace where you have permissions to install apps. If you don’t have a workspace, go ahead and set that up now — you can [go here](https://slack.com/get-started#create) to create one, or you can join the [Developer Program](https://api.slack.com/developer-program) and provision a sandbox with access to all Slack features for free.
-* a development environment with [Python 3.6](https://www.python.org/downloads/) or later.
+* a development environment with [Python 3.7](https://www.python.org/downloads/) or later.
 * an Anthropic or OpenAI account with sufficient credits, and in which you have generated a secret key.
 
 **Skip to the code**
diff --git a/docs/english/tutorial/custom-steps-for-jira/custom-steps-for-jira.md b/docs/english/tutorial/custom-steps-for-jira/custom-steps-for-jira.md
@@ -12,7 +12,7 @@ In this tutorial, you'll learn how to configure custom steps for use with JIRA.
 Before getting started, you will need the following:
 
 * a development workspace where you have permissions to install apps. If you don’t have a workspace, go ahead and set that up now—you can [go here](https://slack.com/get-started#create) to create one, or you can join the [Developer Program](https://api.slack.com/developer-program) and provision a sandbox with access to all Slack features for free.
-* a development environment with [Python 3.6](https://www.python.org/downloads/) or later.
+* a development environment with [Python 3.7](https://www.python.org/downloads/) or later.
 
 **Skip to the code**
 If you'd rather skip the tutorial and just head straight to the code, you can use our [Bolt for Python JIRA functions sample](https://github.com/slack-samples/bolt-python-jira-functions) as a template.
diff --git a/docs/japanese/getting-started.md b/docs/japanese/getting-started.md
@@ -64,7 +64,7 @@ mkdir first-bolt-app
 cd first-bolt-app
 ```
 
-次に、プロジェクトの依存ライブラリを管理する方法として、[Python 仮想環境](https://packaging.python.org/guides/installing-using-pip-and-virtual-environments/#creating-a-virtual-environment)を使ったおすすめの方法を紹介します。これはシステム Python に存在するパッケージとのコンフリクトを防ぐために推奨されている優れた方法です。[Python 3.6 以降](https://www.python.org/downloads/)の仮想環境を作成し、アクティブにしてみましょう。
+次に、プロジェクトの依存ライブラリを管理する方法として、[Python 仮想環境](https://packaging.python.org/guides/installing-using-pip-and-virtual-environments/#creating-a-virtual-environment)を使ったおすすめの方法を紹介します。これはシステム Python に存在するパッケージとのコンフリクトを防ぐために推奨されている優れた方法です。[Python 3.7 以降](https://www.python.org/downloads/)の仮想環境を作成し、アクティブにしてみましょう。
 
 ```shell
 python3 -m venv .venv
diff --git a/pyproject.toml b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools", "pytest-runner==6.0.1", "wheel"]
+requires = ["setuptools", "wheel"]
 build-backend = "setuptools.build_meta"
 
 [project]
@@ -8,7 +8,6 @@ dynamic = ["version", "readme", "dependencies", "authors"]
 description = "The Bolt Framework for Python"
 license = { text = "MIT" }
 classifiers = [
-	"Programming Language :: Python :: 3.6",
 	"Programming Language :: Python :: 3.7",
 	"Programming Language :: Python :: 3.8",
 	"Programming Language :: Python :: 3.9",
@@ -20,7 +19,7 @@ classifiers = [
 	"License :: OSI Approved :: MIT License",
 	"Operating System :: OS Independent",
 ]
-requires-python = ">=3.6"
+requires-python = ">=3.7"
 
 
 [project.urls]
diff --git a/requirements/adapter.txt b/requirements/adapter.txt
@@ -3,8 +3,7 @@
 # used only under slack_bolt/adapter
 boto3<=2
 bottle>=0.12,<1
-chalice<=1.27.3; python_version=="3.6"
-chalice>=1.28,<2; python_version>"3.6"
+chalice>=1.28,<2;
 CherryPy>=18,<19
 Django>=3,<6
 falcon>=2,<5; python_version<"3.11"
@@ -17,8 +16,7 @@ pyramid>=1,<3
 # Sanic and its dependencies
 # Note: Sanic imports tracerite with wild card versions
 tracerite<1.1.2; python_version<="3.8"  # older versions of python are not compatible with tracerite>1.1.2
-sanic>=20,<21; python_version=="3.6"
-sanic>=21,<24; python_version>"3.6" and python_version<="3.8"
+sanic>=21,<24; python_version<="3.8"
 sanic>=21,<26; python_version>"3.8"
 
 starlette>=0.19.1,<1
diff --git a/requirements/adapter_testing.txt b/requirements/adapter_testing.txt
@@ -2,4 +2,4 @@
 moto>=3,<6                               # For AWS tests
 docker>=5,<8                             # Used by moto
 boddle>=0.2,<0.3                         # For Bottle app tests
-sanic-testing>=0.7; python_version>"3.6"
+sanic-testing>=0.7
diff --git a/requirements/tools.txt b/requirements/tools.txt
@@ -1,3 +1,3 @@
 mypy==1.17.1
 flake8==7.3.0
-black==24.8.0             # Until we drop Python 3.6 support, we have to stay with this version
+black==25.1.0
diff --git a/scripts/format.sh b/scripts/format.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+# ./scripts/format.sh
+
+script_dir=`dirname $0`
+cd ${script_dir}/..
+
+pip install -U pip
+pip install -r requirements/tools.txt
+
+black slack_bolt/ tests/
diff --git a/scripts/install_all_and_run_tests.sh b/scripts/install_all_and_run_tests.sh
@@ -14,14 +14,8 @@ pip install -U pip
 pip uninstall python-lambda
 
 test_target="$1"
-python_version=`python --version | awk '{print $2}'`
 
-if [ ${python_version:0:3} == "3.6" ]
-then
-  pip install -U -r requirements.txt
-else
-  pip install -e .
-fi
+pip install -e .
 
 if [[ $test_target != "" ]]
 then
diff --git a/slack_bolt/async_app.py b/slack_bolt/async_app.py
@@ -5,7 +5,7 @@
 If you'd prefer to build your app with [asyncio](https://docs.python.org/3/library/asyncio.html), you can import the [AIOHTTP](https://docs.aiohttp.org/en/stable/) library and call the `AsyncApp` constructor. Within async apps, you can use the async/await pattern.
 
 ```bash
-# Python 3.6+ required
+# Python 3.7+ required
 python -m venv .venv
 source .venv/bin/activate
 
diff --git a/slack_bolt/listener_matcher/builtins.py b/slack_bolt/listener_matcher/builtins.py
@@ -1,5 +1,4 @@
 import re
-import sys
 from logging import Logger
 
 from slack_bolt.error import BoltError
@@ -25,10 +24,7 @@
 from ..logger.messages import error_message_event_type
 from ..util.utils import get_arg_names_of_callable
 
-if sys.version_info.major == 3 and sys.version_info.minor <= 6:
-    from re import _pattern_type as Pattern  # type: ignore[attr-defined]
-else:
-    from re import Pattern
+from re import Pattern
 from typing import Callable, Awaitable, Any, Sequence, Optional, Union, Dict
 
 from slack_bolt.kwargs_injection import build_required_kwargs
@@ -169,7 +165,7 @@ def _check_event_subtype(event_payload: dict, constraints: dict) -> bool:
     return True
 
 
-def _verify_message_event_type(event_type: str) -> None:
+def _verify_message_event_type(event_type: Union[str, Pattern]) -> None:
     if isinstance(event_type, str) and event_type.startswith("message."):
         raise ValueError(error_message_event_type(event_type))
     if isinstance(event_type, Pattern) and "message\\." in event_type.pattern:
@@ -324,7 +320,7 @@ def _block_action(
     elif isinstance(constraints, dict):
         # block_id matching is optional
         block_id: Optional[Union[str, Pattern]] = constraints.get("block_id")
-        action_id = constraints.get("action_id")
+        action_id = constraints.get("action_id")  # type: ignore[assignment]
         if block_id is None and action_id is None:
             return False
         block_id_matched = block_id is None or _matches(block_id, action.get("block_id"))  # type: ignore[union-attr]
diff --git a/slack_bolt/logger/messages.py b/slack_bolt/logger/messages.py
@@ -60,7 +60,7 @@ def error_authorize_conflicts() -> str:
     return "`authorize` in the top-level arguments is not allowed when you pass either `oauth_settings` or `oauth_flow`"
 
 
-def error_message_event_type(event_type: str) -> str:
+def error_message_event_type(event_type: Union[str, Pattern]) -> str:
     return (
         f'Although the document mentions "{event_type}", '
         'it is not a valid event type. Use "message" instead. '
diff --git a/slack_bolt/util/utils.py b/slack_bolt/util/utils.py
@@ -32,19 +32,7 @@ def convert_to_dict(obj: Union[Dict, JsonObject]) -> Dict:
 
 
 def create_copy(original: Any) -> Any:
-    if sys.version_info.major == 3 and sys.version_info.minor <= 6:
-        # NOTE: Unfortunately, copy.deepcopy doesn't work in Python 3.6.5.
-        # --------------------
-        # >     rv = reductor(4)
-        # E     TypeError: can't pickle _thread.RLock objects
-        # ../../.pyenv/versions/3.6.10/lib/python3.6/copy.py:169: TypeError
-        # --------------------
-        # As a workaround, this operation uses shallow copies in Python 3.6.
-        # If your code modifies the shared data in threads / async functions, race conditions may arise.
-        # Please consider upgrading Python major version to 3.7+ if you encounter some issues due to this.
-        return copy.copy(original)
-    else:
-        return copy.deepcopy(original)
+    return copy.deepcopy(original)
 
 
 def get_boot_message(development_server: bool = False) -> str:
