from functools import partial

try:
    from .location import Location
except ImportError:
    from location import Location

class Emitter(Location):
    """
    Emit a signal from position x_0 (and time t_0)
    """
    def __repr__(self):
        return "Emitter({})".format(repr(self.x))

    def emit(self, travel_signal: callable) -> callable:
        return partial(travel_signal, x_0=self.x)