from collections import namedtuple

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

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

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

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