from __future__ import print_function
import pupil_tracker

try:
    tracker = pupil_tracker.Tracker('gaze')
    out = open('gaze1.dat', 'wt')
    while True:
        msgs = tracker.read_all()
        for msg in msgs:
            q = msg['norm_pos']
            print(q[0], q[1], file = out, sep = '\t')

finally:
    try: out.close()
    except: pass