Function des3_cbc_encrypt 

pub fn des3_cbc_encrypt<'py>(
    py: Python<'py>,
    key: &[u8],
    iv: &[u8],
    plaintext: &[u8],
    pad: bool,
) -> PyResult<Bound<'py, PyBytes>>

Encrypt data using 3DES-EDE-CBC.

key must be 16 bytes (two-key 3DES) or 24 bytes (three-key 3DES). iv must be 8 bytes.

When pad=True (default) PKCS#7 padding is applied automatically. When pad=False the caller is responsible for correct block alignment.

import synta

ct = synta.des3_cbc_encrypt(key_24, iv_8, plaintext)