- How To Run A Flask App Mac Command Line File
- How To Run A Flask App Mac Command Line Linux
- How To Run A Flask App Mac Command Line Create File
- How To Run A Flask App Mac Command Line Rename File
Starting with Flask 0.11 there are multiple built-in ways to run adevelopment server. The best one is the flask command line utilitybut you can also continue using the
Flask.run()
method.Create a shell script (e.g. Flasktest.sh) with the following content. Export FLASKAPP=myapp.py # optional debug mode export FLASKDEBUG=1 flask. NOTE: assuming myapp.py contains a flask app object named app (e.g. App = Flask (name) ). If your app object is named something else, you can specifiy the app object name by using export FLASKAPP=myapp:application. (venv) $ mkdir myapp (venv) $ vim myapp/init.py # a gui editor Paste this code (from the Quick Start tutorial ) into your file: from flask import Flask app = Flask ( name ) @app.route ( '/' ) def helloworld : return 'Hello, World!'
Command Line¶
The flask command line script (Command Line Interface) is stronglyrecommended for development because it provides a superior reloadexperience due to how it loads the application. The basic usage is likethis:
C mac os app. This enables the development environment, including the interactivedebugger and reloader, and then starts the server onhttp://localhost:5000/.
How To Run A Flask App Mac Command Line File
The individual features of the server can be controlled by passing morearguments to the
run
option. For instance the reloader can bedisabled:Note Dotloop app for mac.
How To Run A Flask App Mac Command Line Linux
Prior to Flask 1.0 the
FLASK_ENV
environment variable wasnot supported and you needed to enable debug mode by exportingFLASK_DEBUG=1
. This can still be used to control debug mode, butyou should prefer setting the development environment as shownabove.In Code¶
How To Run A Flask App Mac Command Line Create File
How To Run A Flask App Mac Command Line Rename File
How to remove apps from startup. The alternative way to start the application is through the
Flask.run()
method. This will immediately launch a local serverexactly the same way the flask script does.Example:
This works well for the common case but it does not work well fordevelopment which is why from Flask 0.11 onwards the flaskmethod is recommended. The reason for this is that due to how the reloadmechanism works there are some bizarre side-effects (like executingcertain code twice, sometimes crashing without message or dying when asyntax or import error happens).
It is however still a perfectly valid method for invoking a non automaticreloading application.
Dependencies¶
Install iphone apps on mac. These distributions will be installed automatically when installing Flask.
- Werkzeug implements WSGI, the standard Python interface betweenapplications and servers.
- Jinja is a template language that renders the pages your applicationserves.
- MarkupSafe comes with Jinja. It escapes untrusted input when renderingtemplates to avoid injection attacks.
- ItsDangerous securely signs data to ensure its integrity. This is usedto protect Flask’s session cookie.
- Click is a framework for writing command line applications. It providesthe
flask
command and allows adding custom management commands.
Optional dependencies¶
These distributions will not be installed automatically. Flask will detect anduse them if you install them.
- Blinker provides support for Signals.
- SimpleJSON is a fast JSON implementation that is compatible withPython’s
json
module. It is preferred for JSON operations if it isinstalled. - python-dotenv enables support for Environment Variables From dotenv when running
flask
commands. - Watchdog provides a faster, more efficient reloader for the developmentserver.