arrays - (Dictionary) storing keys with x,y in Python -

what trying store x,y value key. example, in case, need once x,y has reached value of 3, process happens.

here have tried: however, gives me error, unable store lists within dictionaries.

dictionary= {} player = [0,0]  def checking():     if player in dictionary:         dictionary[[player]] +=1         print("repopulate", dictionary)     else:         dictionary[player] = 0         print(dictionary)     if dictionary.get(player) >= 3:         print("it done!") 

edit: sorry lack of clarity in question. player variable user input of user wishes move within x,y given. there multiple treasures, , if user chose position x,y same treasure x,y; +1 should added treasure. once treasure reaches 3, should diminished.

i think want use player key, , count value of key:

>>> treasure_hits = {} >>> player = (0,0) >>> try: ...   treasure_hits[player] += 1 ... except keyerror: ...   treasure_hits[player] = 0 ...  >>> treasure_hits {(0, 0): 0} >>>  >>> try: ...   treasure_hits[player] += 1 ... except keyerror: ...   treasure_hits[player] = 0 ...  >>> treasure_hits {(0, 0): 1} >>>  

making treasure_hits tuple instead of list allows used key since immutable