import sys, os

_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))  # nmea_client/
_gui  = os.path.dirname(os.path.abspath(__file__))                   # nmea_client/gui/

for _p in [_root, _gui]:
    if _p not in sys.path:
        sys.path.insert(0, _p)