Я не получил именно то, что вы хотели, но вот что я думаю:
from collections import Counter
def count_occurence(seq):
counted_states = []
transition_dict = {}
for tup in seq:
if tup not in counted_states:
transition_dict[tup] = seq.count(tup)
counted_states.append(tup)
print(transition_dict)
#{('A', 'A'): 3, ('A', 'B'): 2, ('B', 'B'): 1, ('B', 'A'): 2}
def markov(seq):
states = Counter(seq).keys()
print(states)
#dict_keys(['A', 'B'])
a = list(zip(seq[:-1], seq[1:]))
print(a)
#[('A', 'A'), ('A', 'B'), ('B', 'B'), ('B', 'A'), ('A', 'B'), ('B',
#'A'), ('A', 'A'), ('A', 'A')]
return a
seq = markov(["A","A","B","B","A","B","A","A","A"])
count_occurence(seq)