def guess_stream_needs_encoding(fileobj, default=True):
    # XXX: Unicode
    # On Python 2, stdout is bytes. However, we can't wrap it in a
    # TextIOWrapper, as it's not from IOBase, so it doesn't have .seekable.
    # It does, however, have a mode, and we can cheese it base on that.
    # On Python 3, stdout is a TextIOWrapper, and so we can safely write
    # str to it, and it will encode it correctly for the target terminal or
    # whatever.
    # If it's a io.BytesIO or StringIO, then it won't have a mode, but it
    # is a read/write stream, so we can get its type by reading 0 bytes and
    # checking the type.
    try:
        # If it's a r/w stream, this will give us the type of it
        t = type(fileobj.read(0))

        if t is bytes:
            return True
        elif t is unicode:
            return False

    except:
        pass

    try:
        mode = fileobj.mode

        if PY2 and mode == "w":
            mode = "wb"

        if "b" in mode:
            return True
        else:
            return False
    except:
        pass

    return default
Guess the type (bytes/unicode) of this stream, and return whether or not it
dataset/ETHPy150Open crossbario/txaio/txaio/_iotype.py/guess_stream_needs_encoding