human
I wrote the below code

    from Crypto.Cipher import AES
    def unpad(s):
        return s[:(- ord(s[(-1)]))]
    iv = ciphertext[:AES.block_size]
    cipher = AES.new(key, AES.MODE_CBC, iv)
    plaintext = unpad(cipher.decrypt(ciphertext))[AES.block_size:]
    return plaintext

What's a good function header?

Here's a good function header?
assistant
#Here's a good function header.

def decrypt_aes(ciphertext, key):