Dropped support for Python 3.7 (#637)

* update RELEASE_BRANCH env

* drop support for python 3.7

* add changelog entry

.changes/unreleased/Under the Hood-20230530-161341.yaml

@@ -0,0 +1,6 @@
+kind: Under the Hood
+body: remove support for python 3.7
+time: 2023-05-30T16:13:41.217839-05:00
+custom:
+  Author: McKnight-42
+  Issue: "638"

.github/scripts/integration-test-matrix.js

@@ -1,6 +1,6 @@
 module.exports = ({ context }) => {
   const defaultPythonVersion = "3.8";
-  const supportedPythonVersions = ["3.7", "3.8", "3.9", "3.10", "3.11"];
+  const supportedPythonVersions = ["3.8", "3.9", "3.10", "3.11"];
   const supportedAdapters = ["snowflake"];
 
   // if PR, generate matrix based on files changed and PR labels

.github/workflows/main.yml

@@ -72,7 +72,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.8', '3.9', '3.10', '3.11']
 
     env:
       TOXENV: "unit"
@@ -174,7 +174,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.8', '3.9', '3.10', '3.11']
 
     steps:
       - name: Set up Python ${{ matrix.python-version }}

.github/workflows/nightly-release.yml

@@ -26,7 +26,7 @@ defaults:
     shell: bash
 
 env:
-  RELEASE_BRANCH: "1.4.latest"
+  RELEASE_BRANCH: "1.5.latest"
 
 jobs:
   aggregate-release-data:

CONTRIBUTING.md

@@ -79,7 +79,7 @@ WARNING: The parameters in your `test.env` file must link to a valid Snowflake a
 There are a few methods for running tests locally.
 
 #### `tox`
-`tox` automatically runs unit tests against several Python versions using its own virtualenvs. Run `tox -p` to run unit tests for Python 3.7, Python 3.8, Python 3.9, Python 3.10, and `flake8` in parallel. Run `tox -e py37` to invoke tests on Python version 3.7 only (use py37, py38, py39, or py310). Tox recipes are found in `tox.ini`.
+`tox` automatically runs unit tests against several Python versions using its own virtualenvs. Run `tox -p` to run unit tests for Python 3.8, Python 3.9, Python 3.10, and `flake8` in parallel. Run `tox -e py38` to invoke tests on Python version 3.8 only (use py38, py39, or py310). Tox recipes are found in `tox.ini`.
 
 #### `pytest`
 You may run a specific test or group of tests using `pytest` directly. Activate a Python virtualenv active with dev dependencies installed. Then, run tests like so:

dev-requirements.txt

@@ -8,14 +8,12 @@ git+https://github.com/dbt-labs/dbt-core.git#egg=dbt-tests-adapter&subdirectory=
 black~=23.3
 bumpversion~=0.6.0
 click~=8.1
-flake8~=5.0;python_version=="3.7"
 flake8~=6.0;python_version>="3.8"
 flaky~=3.7
 freezegun~=1.2
 ipdb~=0.13.13
 mypy==1.3.0  # patch updates have historically introduced breaking changes
 pip-tools~=6.13
-pre-commit~=2.21;python_version=="3.7"
 pre-commit~=3.2;python_version>="3.8"
 pre-commit-hooks~=4.4
 pytest~=7.3
@@ -24,7 +22,6 @@ pytest-dotenv~=0.5.2
 pytest-logbook~=1.2
 pytest-xdist~=3.2
 pytz~=2023.3
-tox~=3.0;python_version=="3.7"
 tox~=4.4;python_version>="3.8"
 types-pytz~=2023.3
 types-requests~=2.28

setup.py

@@ -3,10 +3,10 @@
 import sys
 import re
 
-# require python 3.7 or newer
-if sys.version_info < (3, 7):
+# require python 3.8 or newer
+if sys.version_info < (3, 8):
     print("Error: dbt does not support this version of Python.")
-    print("Please upgrade to Python 3.7 or higher.")
+    print("Please upgrade to Python 3.8 or higher.")
     sys.exit(1)
 
 
@@ -77,11 +77,11 @@ def _get_dbt_core_version():
         "Operating System :: Microsoft :: Windows",
         "Operating System :: MacOS :: MacOS X",
         "Operating System :: POSIX :: Linux",
-        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
     ],
-    python_requires=">=3.7",
+    python_requires=">=3.8",
 )

tox.ini

@@ -1,8 +1,8 @@
 [tox]
 skipsdist = True
-envlist = py37,py38,py39,py310,py311
+envlist = py38,py39,py310,py311
 
-[testenv:{unit,py37,py38,py39,py310,py311,py}]
+[testenv:{unit,py38,py39,py310,py311,py}]
 description = unit testing
 skip_install = true
 passenv =
@@ -13,7 +13,7 @@ deps =
   -rdev-requirements.txt
   -e.
 
-[testenv:{integration,py37,py38,py39,py310,py311,py}-{snowflake}]
+[testenv:{integration,py38,py39,py310,py311,py}-{snowflake}]
 description = adapter plugin integration testing
 skip_install = true
 passenv =