list.size python

my_list = [1, 2, 3, 4, 5]
size = len(my_list)
print(size)

my_list = [1, 2, 3, 4, 5]
count = 0
for _ in my_list:
    count += 1
print(count)

my_list = [1, 2, 3, 4, 5]
size = sum(1 for _ in my_list)
print(size)

import numpy as np

my_list = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
size = np.array(my_list).size
print(size)

import pandas as pd

data = {'A': [1, 2, 3], 'B': [4, 5, 6], 'C': [7, 8, 9]}
df = pd.DataFrame(data)
size = df.size
print(size)

from collections import Counter

my_list = [1, 2, 3, 4, 5, 1, 2, 3]
size = sum(Counter(my_list).values())
print(size)

from functools import reduce

my_list = [1, 2, 3, 4, 5]
size = reduce(lambda x, _: x + 1, my_list, 0)
print(size)

from operator import length_hint

my_list = [1, 2, 3, 4, 5]
size = length_hint(my_list)
print(size)