Upgrade Flask MV to 3.0 (mlflow#10098)

Signed-off-by: B-Step62 <[email protected]>

Author: B-Step62

.github/workflows/requirements.yml

@@ -79,4 +79,5 @@ jobs:
       - name: Run tests
         run: |
           source dev/setup-ssh.sh
-          ./dev/run-python-tests.sh
+          pytest tests --quiet --requires-ssh --ignore-flavors \
+            --ignore=tests/examples --ignore=tests/recipes --ignore=tests/evaluate

CONTRIBUTING.md

@@ -581,7 +581,8 @@ request by running:
 
 ```bash
 pre-commit run --all-files
-./dev/run-python-tests.sh
+pytest tests --quiet --requires-ssh --ignore-flavors \
+  --ignore=tests/examples --ignore=tests/recipes --ignore=tests/evaluate
 ```
 
 We use [pytest](https://docs.pytest.org/en/latest/contents.html) to run
@@ -612,7 +613,7 @@ If you are adding new framework flavor support, you'll need to modify
 `pytest` and Github action configurations so tests for your code can run
 properly. Generally, the files you'll have to edit are:
 
-1.  `dev/run-python-tests.sh`:
+1.  `.github/workflows/master.yml`: lines where pytest runs with `--ignore-flavors` flag
 
     1. Add your tests to the ignore list, where the other frameworks are
        ignored

mlflow/server/__init__.py

@@ -7,7 +7,6 @@
 import types
 
 from flask import Flask, Response, send_from_directory
-from flask import __version__ as flask_version
 from packaging.version import Version
 
 from mlflow.exceptions import MlflowException
@@ -40,7 +39,7 @@
 REL_STATIC_DIR = "js/build"
 
 app = Flask(__name__, static_folder=REL_STATIC_DIR)
-IS_FLASK_V1 = Version(flask_version) < Version("2.0")
+IS_FLASK_V1 = Version(importlib.metadata.version("flask")) < Version("2.0")
 
 
 for http_path, handler, methods in handlers.get_endpoints():

requirements/core-requirements.txt

@@ -4,7 +4,7 @@
 
 alembic<2,!=1.10.0
 docker<7,>=4.0.0
-Flask<3
+Flask<4
 numpy<2
 scipy<2
 pandas<3

requirements/core-requirements.yaml

@@ -17,7 +17,7 @@ docker:
 
 flask:
   pip_release: Flask
-  max_major_version: 2
+  max_major_version: 3
 
 numpy:
   pip_release: numpy