Типы данных в Python

l = list(range(1, 10))[::-1] + list(range(1, 10))[::-1]
print(l)
print(set(l))

[9, 8, 7, 6, 5, 4, 3, 2, 1, 9, 8, 7, 6, 5, 4, 3, 2, 1]
{1, 2, 3, 4, 5, 6, 7, 8, 9}

from sys import getsizeof
 
 
ds = dict()
ss = set()
db = dict()
sb = set()
 
for i in range(10):
    ds[i] = i
    ss.add(i)
 
for i in range(10000000):
    db[i] = i
    sb.add(i)
 
print(f'small dict: {getsizeof(ds)}')
print(f'small set: {getsizeof(ss)}')
print(f'large dict: {getsizeof(db)}')
print(f'large set: {getsizeof(sb)}')

small dict: 352
small set: 728
large dict: 335544400
large set: 268435672

>>> set('hello')
{'e', 'l', 'o', 'h'}
>>> set('abcdefghijklmnopqrstuvwxyz')
{'j', 'i', 'l', 'm', 'n', 'e', 'r', 'x', 'z', 'g', 'y', 'f', 'p', 'd', 'h', 'b', 's', 'v', 'w', 'u', 'q', 'a', 't', 'k', 'c', 'o'}

>>> from pympler import asizeof
>>> a_dict = {a:a for a in range(10)}
>>> asizeof.asizeof(a_dict)
664
>>> a_set = set(range(10))
>>> asizeof.asizeof(a_set)
1040
>>> a_dict = {a:a for a in range(1000_000)}
>>> asizeof.asizeof(a_dict)
73943120
>>> a_set = set(range(1000_000))
>>> asizeof.asizeof(a_set)
65554640
>>> 73943120 - 65554640
8388480