Create an environment Create a project folder and a venv folder within:
$ mkdir myproject $ cd myproject $ python3 -m venv venv On Windows:
$ py -3 -m venv venv If you needed to install virtualenv because you are using Python 2, use the following command instead:
$ python2 -m virtualenv venv On Windows:
\Python27\Scripts\virtualenv.exe venv Activate the environment Before you work on your project, activate the corresponding environment:
$ . venv/bin/activate On Windows:
venv\Scripts\activate Your shell prompt will change to show the name of the activated environment.
Install Flask Within the activated environment, use the following command to install Flask:
$ pip install Flask Flask is now installed. Check out the Quickstart or go to the Documentation Overview.
Living on the edge If you want to work with the latest Flask code before it’s released, install or update the code from the master branch:
$ pip install -U https://github.com/pallets/flask/archive/master.tar.gz Install virtualenv If you are using Python 2, the venv module is not available. Instead, install virtualenv.
On Linux, virtualenv is provided by your package manager:
$ sudo apt-get install python-virtualenv
$ sudo yum install python-virtualenv
$ sudo pacman -S python-virtualenv If you are on Mac OS X or Windows, download get-pip.py, then:
$ sudo python2 Downloads/get-pip.py $ sudo python2 -m pip install virtualenv On Windows, as an administrator:
\Python27\python.exe Downloads\get-pip.py \Python27\python.exe -m pip install virtualenv
To run app export FLASK_APP=main.py set FLASK_APP=main.py //windows flask run