Use the Counter.
from collections import Counter
A = [[1,2], [2,1], [3,1], [1,2]]
print Counter(tuple(i) for i in A)
>>>
Counter({(1, 2): 2, (3, 1): 1, (2, 1): 1})
1
solved Getting a count of list elements [closed]
Use the Counter.
from collections import Counter
A = [[1,2], [2,1], [3,1], [1,2]]
print Counter(tuple(i) for i in A)
>>>
Counter({(1, 2): 2, (3, 1): 1, (2, 1): 1})
1
solved Getting a count of list elements [closed]