chore: Drop python3.7 support for SAM-T (#3403)

Author: xazhao

.github/workflows/build.yml

@@ -20,7 +20,6 @@ jobs:
         os:
           - ubuntu-latest
         python:
-          - "3.7"
           - "3.8"
           - "3.9"
           - "3.10"

DEVELOPMENT_GUIDE.md

@@ -26,7 +26,7 @@ Environment setup
 -----------------
 ### 1. Install Python versions
 
-Our officially supported Python versions are 3.7, 3.8, 3.9 and 3.10. 
+Our officially supported Python versions are 3.8, 3.9 and 3.10. 
 Our CI/CD pipeline is setup to run unit tests against Python 3 versions. Make sure you test it before sending a Pull Request.
 See [Unit testing with multiple Python versions](#unit-testing-with-multiple-python-versions).
 
@@ -40,12 +40,11 @@ easily setup multiple Python versions. For
 1.  Install PyEnv -
     `curl -L https://github.com/pyenv/pyenv-installer/raw/master/bin/pyenv-installer | bash`
 1. Restart shell so the path changes take effect - `exec $SHELL`
-1.  `pyenv install 3.7.16`
 1.  `pyenv install 3.8.16`
 1.  `pyenv install 3.9.16`
 1.  `pyenv install 3.10.9`
 3.  Make Python versions available in the project:
-    `pyenv local 3.7.16 3.8.16 3.9.16 3.10.9`
+    `pyenv local 3.8.16 3.9.16 3.10.9`
 
 Note: also make sure the following lines were written into your `.bashrc` (or `.zshrc`, depending on which shell you are using):
 ```
@@ -66,7 +65,7 @@ can be found [here](https://black.readthedocs.io/en/stable/editor_integration.ht
 Since black is installed in virtualenv, when you follow [this instruction](https://black.readthedocs.io/en/stable/editor_integration.html), `which black` might give you this
 
 ```bash
-(sam37) $ where black
+(sam38) $ where black
 /Users/<username>/.pyenv/shims/black
 ```
 
@@ -77,11 +76,11 @@ and this will happen:
 pyenv: black: command not found
 
 The `black' command exists in these Python versions:
-  3.7.9/envs/sam37
-  sam37
+  3.8.16/envs/sam38
+  sam38
 ``` 
 
-A simple workaround is to use `/Users/<username>/.pyenv/versions/sam37/bin/black` 
+A simple workaround is to use `/Users/<username>/.pyenv/versions/sam38/bin/black` 
 instead of `/Users/<username>/.pyenv/shims/black`.
 
 #### Pre-commit
@@ -99,15 +98,15 @@ handy plugin that can create virtualenv.
 Depending on the python version, the following commands would change to
 be the appropriate python version.
 
-1.  Create Virtualenv `sam37` for Python3.7: `pyenv virtualenv 3.7.9 sam37`
-1.  Activate Virtualenv: `pyenv activate sam37`
+1.  Create Virtualenv `sam38` for Python3.8: `pyenv virtualenv 3.8.16 sam38`
+1.  Activate Virtualenv: `pyenv activate sam38`
 
 ### 4. Install dev version of SAM transform
 
 We will install a development version of SAM transform from source into the
 virtualenv.
 
-1.  Activate Virtualenv: `pyenv activate sam37`
+1.  Activate Virtualenv: `pyenv activate sam38`
 1.  Install dev version of SAM transform: `make init`
 
 Running tests
@@ -121,8 +120,8 @@ Run `make test` or `make test-fast`. Once all tests pass make sure to run
 
 ### Unit testing with multiple Python versions
 
-Currently, our officially supported Python versions are 3.7, 3.8, 3.9 and 3.10. For the most
-part, code that works in Python3.7 will work in Pythons 3.8, 3.9 and 3.10. You only run into problems if you are
+Currently, our officially supported Python versions are 3.8, 3.9 and 3.10. For the most
+part, code that works in Python3.8 will work in Pythons 3.9 and 3.10. You only run into problems if you are
 trying to use features released in a higher version (for example features introduced into Python3.10
 will not work in Python3.9). If you want to test in many versions, you can create a virtualenv for
 each version and flip between them (sourcing the activate script). Typically, we run all tests in

HOWTO.md

@@ -21,7 +21,7 @@ Check out the [latest specification](versions/2016-10-31.md) for details on how
 You could also use the [aws-sam-cli](https://github.com/awslabs/aws-sam-cli) to get started 
 
 ```shell
-$ sam init --runtime python3.7
+$ sam init --runtime python3.8
 ```
 ## Packing Artifacts
 Before you can deploy a SAM template, you should first upload your Lambda 

README.md

@@ -85,7 +85,7 @@ For a more thorough introduction, see the [this tutorial](https://docs.aws.amazo
 
 ### Setting up development environment
 
-You'll need to have Python 3.7+ installed.
+You'll need to have Python 3.8+ installed.
 
 Create a [virtual environment](https://docs.python.org/3/library/venv.html):
 

bin/transform-test-error-json-format.py

@@ -8,13 +8,11 @@
 import sys
 from pathlib import Path
 
-from typing_extensions import Final
-
 # To allow this script to be executed from other directories
 sys.path.insert(0, str(Path(__file__).absolute().parent.parent))
 
 import json
-from typing import Type
+from typing import Final, Type
 
 from bin._file_formatter import FileFormatter
 

integration/helpers/deployer/utils/colors.py

@@ -2,9 +2,7 @@
 Wrapper to generated colored messages for printing in Terminal
 This was ported over from the sam-cli repo
 """
-from typing import Dict
-
-from typing_extensions import Literal
+from typing import Dict, Literal
 
 SupportedColor = Literal["red", "green", "yellow"]
 

integration/ruff.toml

@@ -15,8 +15,8 @@ select = [
     "UP", # pyupgrade
 ]
 
-# Mininal python version we support is 3.7
-target-version = "py37"
+# Mininal python version we support is 3.8
+target-version = "py38"
 
 [per-file-ignores]
 

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.black]
 line-length = 120
-target_version = ['py37', 'py38', 'py39', 'py310']
+target_version = ['py38', 'py39', 'py310']
 exclude = '''
 
 (

pytest.ini

@@ -14,8 +14,6 @@ filterwarnings =
     # From our own tests
     ignore:__init__ is deprecated and will be removed in a future release:DeprecationWarning
     ignore:deprecated_function is deprecated and will be removed in a future release, please use replacement_function:DeprecationWarning
-    # Python 3.7 deprecation
-    ignore::boto3.exceptions.PythonDeprecationWarning
     # https://github.com/pytest-dev/pytest-xdist/issues/825#issuecomment-1292450429
     ignore:The --rsyncdir command line argument and rsyncdirs config variable are deprecated.:DeprecationWarning
     # Pytest warnings

requirements/base.txt

@@ -1,6 +1,6 @@
 boto3>=1.19.5,==1.*
 jsonschema<5,>=3.2  # TODO: evaluate risk of removing jsonschema 3.x support
-typing_extensions>=4.4,<5 # 3.7 doesn't have Literal
+typing_extensions>=4.4 # 3.8 doesn't have Required, TypeGuard and ParamSpec
 
 # resource validation & schema generation
 pydantic>=1.8,<3

requirements/dev.txt

@@ -19,7 +19,7 @@ tenacity~=8.0
 requests~=2.28
 
 # formatter
-black==23.3.0  # 23.3.0 is the last version supporting python 3.7
+black==23.10.1
 ruamel.yaml==0.17.21  # It can parse yaml while perserving comments
 
 # type check
@@ -29,7 +29,3 @@ mypy~=1.3.0
 boto3-stubs[appconfig,serverlessrepo]>=1.19.5,==1.*
 types-PyYAML~=6.0
 types-jsonschema~=3.2
-
-# Check package version (backport importlib.metadata for python 3.7)
-# https://docs.python.org/3/library/importlib.metadata.html
-importlib_metadata; python_version < '3.8'

ruff.toml

@@ -37,8 +37,8 @@ ignore = [
     "G004",
 ]
 
-# Mininal python version we support is 3.7
-target-version = "py37"
+# Mininal python version we support is 3.8
+target-version = "py38"
 
 [per-file-ignores]
 # python scripts in bin/ needs some python path configurations before import

samtranslator/internal/model/appsync.py

@@ -1,6 +1,6 @@
-from typing import Any, Dict, List, Optional, Union
+from typing import Any, Dict, List, Optional, TypedDict, Union
 
-from typing_extensions import Required, TypedDict
+from typing_extensions import Required
 
 from samtranslator.model import GeneratedProperty, Resource
 from samtranslator.model.intrinsics import fnGetAtt, ref

samtranslator/internal/schema_source/aws_serverless_api.py

@@ -1,8 +1,6 @@
 from __future__ import annotations
 
-from typing import Dict, List, Optional, Union
-
-from typing_extensions import Literal
+from typing import Dict, List, Literal, Optional, Union
 
 from samtranslator.internal.schema_source.aws_serverless_connector import EmbeddedConnector
 from samtranslator.internal.schema_source.common import (

samtranslator/internal/schema_source/aws_serverless_application.py

@@ -1,8 +1,6 @@
 from __future__ import annotations
 
-from typing import Any, Dict, Optional, Union
-
-from typing_extensions import Literal
+from typing import Any, Dict, Literal, Optional, Union
 
 from samtranslator.internal.schema_source.common import (
     BaseModel,

samtranslator/internal/schema_source/aws_serverless_connector.py

@@ -1,6 +1,4 @@
-from typing import List, Optional, Union
-
-from typing_extensions import Literal
+from typing import List, Literal, Optional, Union
 
 from samtranslator.internal.schema_source.common import (
     BaseModel,

samtranslator/internal/schema_source/aws_serverless_function.py

@@ -1,8 +1,6 @@
 from __future__ import annotations
 
-from typing import Dict, List, Optional, Union
-
-from typing_extensions import Literal
+from typing import Dict, List, Literal, Optional, Union
 
 from samtranslator.internal.schema_source.aws_serverless_connector import EmbeddedConnector
 from samtranslator.internal.schema_source.common import (

samtranslator/internal/schema_source/aws_serverless_graphqlapi.py

@@ -1,6 +1,4 @@
-from typing import Dict, List, Optional, Union
-
-from typing_extensions import Literal
+from typing import Dict, List, Literal, Optional, Union
 
 from samtranslator.internal.schema_source.common import (
     BaseModel,

samtranslator/internal/schema_source/aws_serverless_httpapi.py

@@ -1,8 +1,6 @@
 from __future__ import annotations
 
-from typing import Dict, List, Optional, Union
-
-from typing_extensions import Literal
+from typing import Dict, List, Literal, Optional, Union
 
 from samtranslator.internal.schema_source.aws_serverless_connector import EmbeddedConnector
 from samtranslator.internal.schema_source.common import (

samtranslator/internal/schema_source/aws_serverless_layerversion.py

@@ -1,8 +1,6 @@
 from __future__ import annotations
 
-from typing import Optional, Union
-
-from typing_extensions import Literal
+from typing import Literal, Optional, Union
 
 from samtranslator.internal.schema_source.common import (
     BaseModel,

samtranslator/internal/schema_source/aws_serverless_simpletable.py

@@ -1,8 +1,6 @@
 from __future__ import annotations
 
-from typing import Any, Dict, Optional
-
-from typing_extensions import Literal
+from typing import Any, Dict, Literal, Optional
 
 from samtranslator.internal.schema_source.aws_serverless_connector import EmbeddedConnector
 from samtranslator.internal.schema_source.common import (

samtranslator/internal/schema_source/aws_serverless_statemachine.py

@@ -1,8 +1,6 @@
 from __future__ import annotations
 
-from typing import Dict, List, Optional, Union
-
-from typing_extensions import Literal
+from typing import Dict, List, Literal, Optional, Union
 
 from samtranslator.internal.schema_source.aws_serverless_connector import EmbeddedConnector
 from samtranslator.internal.schema_source.common import (

samtranslator/internal/schema_source/common.py

@@ -1,9 +1,7 @@
 import json
 from functools import partial
 from pathlib import Path
-from typing import Any, Dict, List, Optional, TypeVar, Union
-
-from typing_extensions import Literal
+from typing import Any, Dict, List, Literal, Optional, TypeVar, Union
 
 from samtranslator.compat import pydantic
 from samtranslator.model.types import PassThrough

samtranslator/metrics/metrics.py

@@ -4,9 +4,7 @@
 import logging
 from abc import ABC, abstractmethod
 from datetime import datetime
-from typing import Any, Dict, List, Optional, Union
-
-from typing_extensions import TypedDict
+from typing import Any, Dict, List, Optional, TypedDict, Union
 
 from samtranslator.internal.deprecation_control import deprecated
 

samtranslator/model/sam_resources.py

@@ -1,9 +1,7 @@
 """ SAM macro definitions """
 import copy
 from contextlib import suppress
-from typing import Any, Callable, Dict, List, Optional, Tuple, Union, cast
-
-from typing_extensions import Literal
+from typing import Any, Callable, Dict, List, Literal, Optional, Tuple, Union, cast
 
 import samtranslator.model.eventsources
 import samtranslator.model.eventsources.cloudwatchlogs

setup.py

@@ -78,7 +78,7 @@ def read_requirements(req="base.txt"):
         "NOTICE",
         "THIRD_PARTY_LICENSES",
     ),
-    python_requires=">=3.7, <=4.0, !=4.0",
+    python_requires=">=3.8, <=4.0, !=4.0",
     install_requires=read_requirements("base.txt"),
     include_package_data=True,
     extras_require={"dev": read_requirements("dev.txt")},
@@ -93,7 +93,6 @@ def read_requirements(req="base.txt"):
         "License :: OSI Approved :: Apache Software License",
         "Operating System :: OS Independent",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",

tests/ruff.toml

@@ -15,8 +15,8 @@ select = [
     "UP", # pyupgrade
 ]
 
-# Mininal python version we support is 3.7
-target-version = "py37"
+# Mininal python version we support is 3.8
+target-version = "py38"
 
 [per-file-ignores]