Function _is_binary_reader

src/click/_compat.py:151–157

(stream: t.IO[t.Any], default: bool = False)

def _is_binary_reader(stream: t.IO[t.Any], default: bool = False) -> bool:
    try:
        return isinstance(stream.read(0), bytes)
    except Exception:
        return default
        # This happens in some cases where the stream was already
        # closed.  In this case, we assume the default.


def _is_binary_writer(stream: t.IO[t.Any], default: bool = False) -> bool: