Installing Flask installs the flask script, a Click command lineinterface, in your virtualenv. Executed from the terminal, this script givesaccess to built-in, extension, and application-defined commands. The --helpoption will give more information about any commands and options.

Environment Variables From dotenv¶. Rather than setting FLASKAPP each time you open a new terminal, you can use Flask’s dotenv support to set environment variables automatically. If python-dotenv is installed, running the flask command will set environment variables defined in the files.env and.flaskenv.This can be used to avoid having to set FLASKAPP manually every time you open a new.
In this post, we’re going to look at running the app from the command line and then the Mac. Running the App in the Windows Command Prompt. While you can obviously run the app inside of Visual Studio with the F5 command. You should also know that you can run the app inside of the console. Before we begin, make sure you have the app found here.
Apple's Terminal provides you with a UNIX command line inside the OS X environment. You can enter the open command here to open any application, or to open a file with the application of your choice. There are several ways to adjust this command to suit your purposes, including the ability to host the application in your Terminal window.
Question: Q: Windows 'Run' Command on a Mac. Oh, and while not equivalent, the Terminal application allows you access to the unix command line.

With Swift being open source and server side swift gaining more and more traction, command line apps built with swift can be extemely powerful for server side applications. There have been some.

Application Discovery¶

The flask command is installed by Flask, not your application; it must betold where to find your application in order to use it. The FLASK_APPenvironment variable is used to specify how to load the application.

Unix Bash (Linux, Mac, etc.):

Windows CMD:

Windows PowerShell:

While FLASK_APP supports a variety of options for specifying yourapplication, most use cases should be simple. Here are the typical values:

(nothing)

The file wsgi.py is imported, automatically detecting an app(app). This provides an easy way to create an app from a factory withextra arguments.

FLASK_APP=hello

The name is imported, automatically detecting an app (app) or factory(create_app).

FLASK_APP has three parts: an optional path that sets the current workingdirectory, a Python file or dotted import path, and an optional variablename of the instance or factory. If the name is a factory, it can optionallybe followed by arguments in parentheses. The following values demonstrate theseparts:

FLASK_APP=src/hello

Sets the current working directory to src then imports hello.

FLASK_APP=hello.web

Imports the path hello.web.

FLASK_APP=hello:app2

Uses the app2 Flask instance in hello.

FLASK_APP='hello:create_app('dev')'

The create_app factory in hello is called with the string 'dev'as the argument.

If FLASK_APP is not set, the command will try to import “app” or“wsgi” (as a “.py” file, or package) and try to detect an applicationinstance or factory.

Within the given import, the command looks for an application instance namedapp or application, then any application instance. If no instance isfound, the command looks for a factory function named create_app ormake_app that returns an instance.

When calling an application factory, if the factory takes an argument namedscript_info, then the ScriptInfo instance is passed as akeyword argument. If the application factory takes only one argument and noparentheses follow the factory name, the ScriptInfo instanceis passed as a positional argument. If parentheses follow the factory name,their contents are parsed as Python literals and passes as arguments to thefunction. This means that strings must still be in quotes.

Run the Development Server¶

The run command will start the development server. Itreplaces the Flask.run() method in most cases.

Warning

Do not use this command to run your application in production.Only use the development server during development. The development serveris provided for convenience, but is not designed to be particularly secure,stable, or efficient. See Deployment Options for how to run in production.

Open a Shell¶

To explore the data in your application, you can start an interactive Pythonshell with the shell command. An applicationcontext will be active, and the app instance will be imported.

Use shell_context_processor() to add other automatic imports.

Environments¶

Changelog

The environment in which the Flask app runs is set by theFLASK_ENV environment variable. If not set it defaults toproduction. The other recognized environment is development.Flask and extensions may choose to enable behaviors based on theenvironment.

If the env is set to development, the flask command will enabledebug mode and flaskrun will enable the interactive debugger andreloader.

Watch Extra Files with the Reloader¶

When using development mode, the reloader will trigger whenever yourPython code or imported modules change. The reloader can watchadditional files with the --extra-files option, or theFLASK_RUN_EXTRA_FILES environment variable. Multiple paths areseparated with :, or ; on Windows.

Debug Mode¶

Debug mode will be enabled when FLASK_ENV is development,as described above. If you want to control debug mode separately, useFLASK_DEBUG. The value 1 enables it, 0 disables it.

Environment Variables From dotenv¶

Rather than setting FLASK_APP each time you open a new terminal, you canuse Flask’s dotenv support to set environment variables automatically.

If python-dotenv is installed, running the flask command will setenvironment variables defined in the files .env and .flaskenv.This can be used to avoid having to set FLASK_APP manually every time youopen a new terminal, and to set configuration using environment variablessimilar to how some deployment services work.

Variables set on the command line are used over those set in .env,which are used over those set in .flaskenv. .flaskenv should beused for public variables, such as FLASK_APP, while .env should notbe committed to your repository so that it can set private variables.

Directories are scanned upwards from the directory you call flaskfrom to locate the files. The current working directory will be set to thelocation of the file, with the assumption that that is the top level projectdirectory.

The files are only load

Mac How To Run App On Command Line