def parse_altitude(cls, distance, unit):
if distance is not None:
distance = float(distance)
CONVERTERS = {
'km': lambda d: d,
'm': lambda d: units.kilometers(meters=d),
'mi': lambda d: units.kilometers(miles=d),
'ft': lambda d: units.kilometers(feet=d),
'nm': lambda d: units.kilometers(nautical=d),
'nmi': lambda d: units.kilometers(nautical=d)
}
return CONVERTERS[unit](distance)
else:
return distance
def __init__(self, *args, **kwargs):
kilometers = kwargs.pop('kilometers', 0)
if len(args) == 1:
# if we only get one argument we assume
# it's a known distance instead of
# calculating it first
kilometers += args[0]
elif len(args) > 1:
for a, b in util.pairwise(args):
kilometers += self.measure(a, b)
kilometers += units.kilometers(**kwargs)
self.__kilometers = kilometers