Count the frequency of a recurring list — inside a list of lists

Question

I have a list of lists in python and I need to find how many times each sub-list has occurred. Here is a sample,

from collections import Counter
list1 = [[ 1         


        

Answer 1

Try this

list1 = [[ 1., 4., 2.5], [ 1., 2.66666667, 1.33333333], 
         [ 1., 2., 2.], [ 1., 2.66666667, 1.33333333], [ 1., 4., 2.5],
         [ 1., 2.66666667, 1.33333333]]

counter = {}
for el in list1:
    el = str(el)     #This sorts your hashable part or use tuple(el)
    if el in counter:
        counter[el]+=1
    else:
        counter[el]=1

print(counter)

Should output

{'[1.0, 2.0, 2.0]': 1, '[1.0, 2.66666667, 1.33333333]': 3, '[1.0, 4.0, 2.5]': 2}