speed.py

def calculate_speeds(self, starting_time_list, ending_time_list, distance_list):
    speed_list = []
    for i in range(len(starting_time_list)):
        try:
            start_datetime_object = datetime.strptime(starting_time_list[i], '%Y-%m-%d %H:%M:%S')
            end_datetime_object = datetime.strptime(ending_time_list[i], '%Y-%m-%d %H:%M:%S')
            time_taken = end_datetime_object-start_datetime_object
            hrs = time_taken.total_seconds()/3600
            speed_list.append(distance_list[i]/hrs)
        except Exception as e:
            speed_list.append(0.0)
    return speed_list