...

Have a look at the installation instructions at the Flask website. The most important steps are listed here.

On MacOS X or GNU/Linux, run one of the following:

$ sudo pip install virtualenv

or

$ sudo easy_install virtualenv

On Ubuntu, you can use

$ sudo apt-get install python-virtualenv

Get and activate the latest flask version:

$ git clone http://github.com/mitsuhiko/flask.git
Cloning into 'flask'...
...
$ cd flask
$ virtualenv venv --distribute
New python executable in venv/bin/python
Installing distribute............done.
$ . venv/bin/activate
$ python setup.py develop
...
Finished processing dependencies for Flask

Install Pillow

$ pip install Pillow

Download and extract fsikasse or clone the git repository.

To initialize the database, run in the fsikasse-directory

$ flask --app=fsikasse initdb 

And start the app with

$ flask --app=fsikasse run                

From now on, it is sufficient to run in the flask-directory

$ . venv/bin/activate

and then start the app in the fsikasse-directory with

$ flask --app=fsikasse run