def _bytes_to_json ( value ) : if isinstance ( value , bytes ) : value = base64 . standard_b64encode ( value ) . decode ( "ascii" ) return value
from python json to bytes
Coerce value to an JSON - compatible representation .
def _bytes_to_json(value):
    """Coerce 'value' to an JSON-compatible representation."""
    if isinstance(value, bytes):
        value = base64.standard_b64encode(value).decode("ascii")
    return value