self.phases is empty when len(phases) is 1

[BackMountainDevil]

https://github.com/zhc134/tlc-baselines/blob/master/world.py

L118~L121

    def reset(self):
        # record phase info
        self.current_phase = 0  # phase id in self.phases (excluding yellow)
        self._current_phase = self.phases[0]  # true phase id (including yellow)

what if len(self.phases)==0, it will got IndexError: list index out of range. manhattan data in https://github.com/Chacha-Chen/MPLight. In that case, len(phases) is 1, but after L61(self.phases = [i for i in range(len(phases)) if not i in self.yellow_phase_id]), len(self.phases) is 0.

config.json: "roadnetFile": "manhattan.json", "flowFile": "manhattan_7846.json",