¬ just serendipity 🍀 (not just serendipity)

assert int('10') == 10
assert int('010') == 10
assert int('0x10', base=16) == 16
assert int('10', base=16) == 16
assert int('0o10', base=8) == 8
assert int('10', base=8) == 8
assert int('0b10', base=2) == 2
assert int('10', base=2) == 2

assert bin(10) == "0b1010"
assert bin(1) == "0b1"
assert bin(0) == "0b0"

assert oct(10) == "0o12"

assert hex(10) == "0xa"
assert int('0xFF', base=16)  == 255

assert abs(-10) == 10

assert 5 % 3 == 2 ## mod

assert 5 ** 2 == 25

## 0b110
assert (6).bit_count() == 2
assert int(6).bit_count() == 2
# assert 6.bit_count() == 2  ## this fails

assert int(6).bit_length() == 3

def bit_length(n):
    assert isinstance(n, int)
    ans = 0
    while n > 0:
        n >>= 1
        ans += 1
    return ans

assert bit_length(6) == 3
assert bit_length(7) == 3
assert bit_length(8) == 4

def bit_count(n):
    assert isinstance(n, int)
    ans = 0
    while n > 0:
        ans += n & 1
        n >>= 1
    return ans

assert bit_count(6) == 2
assert bit_count(7) == 3
assert bit_count(8) == 1

from math import floor, ceil

assert floor(3.5) == 3
assert ceil(3.5) == 4

assert floor(3) == 3
assert ceil(3) == 3

assert float(3.4).__round__() == 3
assert round(3.4) == 3
assert round(3.7) == 4