Issue when identifying prior matrix in pthp.py

[auto-Dog]

Hi. In your algorithm core code, I am confused about the following line:

PCIC2021_causal_discovery_dmirlab/code/castle_mod/algorithms/ttpm/pthp.py

Lines 412 to 414 in 1f88f40

	def check_prior(self):
	return [(i, j) for i, j in product(range(len(self._event_names)),
	range(len(self._event_names))) if self._prior_matrix[i][j] == -1]

In prior matrix, relevant events are represent as 1, rather than -1. So this function may not identify the priori edge. The debug result also shows that the function check_prior() returns empty list with such setting.