",".join(['1', '2', '3', '4'])

print(type(type(bool(1))))

x = float('inf')
s = x - x
print(s)

import numpy as np
import pandas as pd
a = pd.np.array([1, 2, 3])
b = np.array([-3, 2, 1])
print(a @ b)

print(list(map(lambda f: f(2), [lambda x: x**i for i in range(3)])))

print(list(map(lambda f: f(2), (lambda x: x**i for i in range(3)))))

x = 5
y = '5'
print(not x == y and not y)

1 > 1 or {} or 'hello' or type('hello') is str and False

2 > '1'

x = [1, 2, 3, [4, 5], 6]
print(x[x[3][0]])

(lambda x: x**2 if '' or None or 1 and [False] else lambda x: x*2)(3)