Calculating interesting stuff

calculate.py

def get_actual_infected(self):
    germany_changed = self.germany.tail(2)['sum'][1] - self.germany.tail(2)['sum'][0]
    overall_changed = self.overall.tail(2)['sum'][1] - self.overall.tail(2)['sum'][0]

    germany = '+' if germany_changed > 0 else '-'
    overall = '+' if overall_changed > 0 else '-'

    germany += str(germany_changed)
    overall += str(overall_changed)

    return {
        'germany': [
            self.germany.tail(1)['sum'][0],
            germany
        ],
        'overall': [
            self.overall.tail(1)['sum'][0],
            overall
        ]
    }