listoftuple = [(0, 1, 2), (1, 2, 3)]
s1 = [b  for (a, b, c) in listoftuple]
print(s1)
s2 = list(map(lambda row: row[1], listoftuple))
print(s1 == s2, sum(s1))

def gen():
    for i in range(1, 5):   
        x = yield i
        if x:
            yield x**2
g = gen()
v = g.send(g.send(next(g) + next(g)) + next(g))
print(v)

#1
sorted(x ** 2 for x in range(4))

#2
sorted((x ** 2 for x in range(4)))

#3
sorted((x ** 2 for x in range(4)), reverse=True)

#4
sorted(x ** 2 for x in range(4), reverse=True)   

#5
list(x ** 2 for x in range(4))

import math
sum(map(math.sqrt, (x ** 2 for x in range(3))))

def f(arr):
    return 0 if not arr else arr[0] + f(arr[1:])
print(f([1, 2]))

-453492 % 101 + 453492 % 101

fs1 = [lambda: i for i in range(2)]
fs2 = (lambda: i for i in range(2))
x1, y1 = fs1[0](), fs1[1]()
x2, y2 = next(fs2)(), next(fs2)()
print(x1, y1, x2, y2)

import datetime
t1 = datetime.date(2021, 3, 5) - datetime.date(2021, 2, 23)
t2 = datetime.date(2020, 3, 5) - datetime.date(2020, 2, 23)
print((t2 - t1).days)

import hashlib
m = hashlib.sha256()
m.update(b"hello")
print(m.digest_size, len(m.hexdigest()))