a = 256
b = 256
c = 257
d = 257

print(a is b)  # #1
print(c is d)  # #2

print(True + True + True == 3)  # #3
print(True is 1)               # #4
print(False == 0)              # #5
print(False is 0)              # #6

True
True
True
True
True

False
True
False
True
False

False
True
False
True
False

True
False
False
False
False

grep -Eo '([0-9]{1,3}\.){3}[0-9]{1,3}' /var/log/nginx/access.log

grep -Eo '([0-9]{1,3}\.){3}[0-9]{1,3}' /var/log/nginx/access.log | sort | uniq -c | sort -nr | head

from Crypto.Cipher import AES
from Crypto.Random import get_random_bytes
from Crypto.Util.Padding import pad, unpad

key = get_random_bytes(16)  # 128-битный ключ
cipher = AES.new(key, AES.MODE_CBC)

data = b"Secret message"
padded = pad(data, AES.block_size)
encrypted = cipher.encrypt(padded)

print("Encrypted:", encrypted)

# Для дешифрования нужен IV
iv = cipher.iv
cipher_dec = AES.new(key, AES.MODE_CBC, iv)
decrypted = unpad(cipher_dec.decrypt(encrypted), AES.block_size)

print("Decrypted:", decrypted.decode())

from cryptography.hazmat.primitives.asymmetric import rsa, padding
from cryptography.hazmat.primitives import hashes

# Генерация ключей
private_key = rsa.generate_private_key(public_exponent=65537, key_size=2048)
public_key = private_key.public_key()

message = b"Secret message"

# Шифрование
ciphertext = public_key.encrypt(
    message,
    padding.OAEP(mgf=padding.MGF1(algorithm=hashes.SHA256()), algorithm=hashes.SHA256(), label=None)
)

print("Encrypted:", ciphertext)

# Дешифрование
plaintext = private_key.decrypt(
    ciphertext,
    padding.OAEP(mgf=padding.MGF1(algorithm=hashes.SHA256()), algorithm=hashes.SHA256(), label=None)
)

print("Decrypted:", plaintext.decode())

from cryptography.hazmat.primitives.ciphers.aead import ChaCha20Poly1305
import os

key = ChaCha20Poly1305.generate_key()
nonce = os.urandom(12)

chacha = ChaCha20Poly1305(key)
data = b"Secret message"

# Шифрование
encrypted = chacha.encrypt(nonce, data, None)
print("Encrypted:", encrypted)

# Дешифрование
decrypted = chacha.decrypt(nonce, encrypted, None)
print("Decrypted:", decrypted.decode())

def append_item(item, lst=[]):
    lst.append(item)
    return lst

result1 = append_item(1)
result2 = append_item(2)
result3 = append_item(3)

print(result1)
print(result2)
print(result3)

[1]  
[2]  
[3]

[1]  
[1, 2]  
[1, 2, 3]

[3]  
[3]  
[3]

def append_item(item, lst=None):
    if lst is None:
        lst = []
    lst.append(item)
    return lst