def __init__(self, out_key, in_key):
        """Initialize a new Chacha20Cipher."""
        self._enc_out = CHACHA20_POLY1305(out_key, 'python')
        self._enc_in = CHACHA20_POLY1305(in_key, 'python')
        self._out_counter = 0
        self._in_counter = 0
def __init__ ( self , out_key , in_key ) : self . _enc_out = CHACHA20_POLY1305 ( out_key , 'python' ) self . _enc_in = CHACHA20_POLY1305 ( in_key , 'python' ) self . _out_counter = 0 self . _in_counter = 0
Initialize a new Chacha20Cipher.