from collections import namedtuple

LocationData = namedtuple('LocationData',
        'hwid lat lon eig prec yaw press timestamp')

def have_location(x):
    return x.lat != None and x.lon != None

def maybe_entry(x):
    return x.eig < 5 and (x.prec > 40 or x.prec < 0)

def maybe_indoor(x):
    return x.eig < 1 and (x.prec > 400 or x.prec < 0)