(s, altchars=None)
return encoded
Encode a string using Base64.

    s is the string to encode.  Optional altchars must be a string 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 encoded string is returned.
Encode a string using Base64.
Encode a string using Base64 .
def b64encode(s, altchars=None):
    """Encode a string using Base64.

    s is the string to encode.  Optional altchars must be a string 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 encoded string is returned.
    """
    # Strip off the trailing newline
    encoded = binascii.b2a_base64(s)[:-1]
    if altchars is not None:
        return _translate(encoded, {'+': altchars[0], '/': altchars[1]})
    return encoded
def b64encode ( s , altchars = None ) : # Strip off the trailing newline encoded = binascii . b2a_base64 ( s ) [ : - 1 ] if altchars is not None : return _translate ( encoded , { '+' : altchars [ 0 ] , '/' : altchars [ 1 ] } ) return encoded