Removing python 3.7 support (#680)

Co-authored-by: colin-rogers-dbt <[email protected]>

.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"];
+  const supportedPythonVersions = ["3.8", "3.9"];
   const supportedAdapters = ["snowflake"];
 
   // if PR, generate matrix based on files changed and PR labels

.github/workflows/main.yml

@@ -77,7 +77,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.7, 3.8] # TODO: support unit testing for python 3.9 (https://github.com/dbt-labs/dbt/issues/3689)
+        python-version: [3.8, 3.9]
 
     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]
+        python-version: [3.8, 3.9]
 
     steps:
       - name: Set up Python ${{ matrix.python-version }}

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, and `flake8` in parallel. Run `tox -e py38` to invoke tests on Python version 3.8 only (use py38, or py39). 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:

setup.py

@@ -3,10 +3,10 @@
 import sys
 import re
 
-# require python 3.7 or newer
-if sys.version_info < (3, 7):
-    print('Error: dbt does not support this version of Python.')
-    print('Please upgrade to Python 3.7 or higher.')
+# 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 3.8 or higher.")
     sys.exit(1)
 
 
@@ -83,9 +83,8 @@ def _get_dbt_core_version():
         'Operating System :: MacOS :: MacOS X',
         'Operating System :: POSIX :: Linux',
 
-        'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
     ],
-    python_requires=">=3.7",
+    python_requires=">=3.8",
 )

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 skipsdist = True
-envlist = py37,py38,py39,py310
+envlist = py38,py39
 
 [testenv:{unit,py37,py38,py39,py310,py}]
 description = unit testing
@@ -13,7 +13,7 @@ deps =
   -rdev_requirements.txt
   -e.
 
-[testenv:{integration,py37,py38,py39,py310,py}-{snowflake}]
+[testenv:{integration,py38,py39,py}-{snowflake}]
 description = adapter plugin integration testing
 skip_install = true
 passenv =