def _earth_distance(lat1, lon1, lat2, lon2):
  lat1, lon1 = math.radians(float(lat1)), math.radians(float(lon1))
  lat2, lon2 = math.radians(float(lat2)), math.radians(float(lon2))
  return RADIUS * math.acos(math.sin(lat1) * math.sin(lat2) +
      math.cos(lat1) * math.cos(lat2) * math.cos(lon1 - lon2))
dataset/ETHPy150Open googlearchive/appengine-24hrsinsf-python/models.py/_earth_distance/swapped operands of `-`