base64.b64encode()

base64.b64encode(s, altchars=None)

Encode the bytes-like object s using Base64 and return the encoded bytes.

Optional altchars must be a bytes-like object of at least length 2 (additional characters are ignored) which specifies an alternative alphabet for the + and / characters. This allows an application to e.g. generate URL or filesystem safe Base64 strings. The default is None, for which the standard Base64 alphabet is used.