definitions.py for static variables

A class is created for a certain type of static variable, holding values, that will be used regularly in the future.

class MediaRegionality(enum.Enum):
    REGIONAL = "Regionales Medium"
    NATIONAL = "Überregionales Medium"

Then the values can be used with a naming and a sort of classification attached to them, which increases readability.

media_regionality = {
    "altmark zeitung": MediaRegionality.REGIONAL,
    "antenne brandenburg": MediaRegionality.REGIONAL,
    "apotheken-umschau.de": MediaRegionality.NATIONAL,
    [...]
}

This also allows to change the values for every usage by changing only the static variable at creation, instead of all usages one by one.