Get count of tuples in list regardless of elements orders

Question

I have a list of tuples that looks something like this:

my_list = [(1,12),(12,1),(12,1),(20,15),(7,8),(15,20)]

I want to get a count of the num

Answer 1

You can use collections.Counter, normalizing your elements with sorted first.

from collections import Counter

lst = [(1,12),(12,1),(12,1),(20,15),(7,8),(15,20)]

count = Counter(tuple(sorted(t)) for t in lst)
# output: Counter({(1, 12): 3, (15, 20): 2, (7, 8): 1})

You can then print like so.

for value, amount in count.items():
    print(value, '=', amount)

# Prints: 
# (1, 12) = 3
# (15, 20) = 2
# (7, 8) = 1