<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def create_transition(oracle, method='trn'):
 """Create a transition matrix based on oracle links"""

    mat, hist, n = _create_trn_mat_symbolic(oracle, method)
    return mat, hist, n