Flask 1.0 has been officially released, Flask is a tiny web framework developed in Python, originally built in 2010 and has been developed for 8 years.
Sample code:
from flask import Flask
app = Flask(__name__)@app.route("/")def hello():
return "Hello World!"if __name__ == "__main__":
app.run()
Update highlights:
Python 2.6 and 3.3 are no longer supported.
CLI is more flexible.
If python-dotenv is installed, flask CLI will load environment variables from .flaskenv and .env files without having to export them in every new terminal.
The development server multithreads by default to handle concurrent requests during development.
The previously deprecated flask.ext has been completely removed.
A more useful error notification is displayed when accessing the missing key of request.form in debug mode to avoid confusion for developers with common sources of errors.
The behavior of app.logger has been greatly simplified and easier to customize.
The test_client adds a json parameter for publishing JSON data, and the Response object adds a get_json method to decode the data to JSON in the test.
Added test_cli_runner, a CLI command for testing applications.
A lot of documentation has been rewritten for clarity. This is a long-term ongoing job.
The tutorial and corresponding examples have been rewritten. The new examples use a structured layout and detail each aspect to help new users better avoid common problems and get used to Flask.
See the release notes for details: