Function ready_for_reading

invoke/terminals.py:204–224

Test ``input_`` to determine whether a read action will succeed. :param input_: Input stream object (file-like). :returns: ``True`` if a read should succeed, ``False`` otherwise. .. versionadded:: 1.0

(input_: IO)

def ready_for_reading(input_: IO) -> bool:
    """
    Test ``input_`` to determine whether a read action will succeed.

    :param input_: Input stream object (file-like).

    :returns: ``True`` if a read should succeed, ``False`` otherwise.

    .. versionadded:: 1.0
    """
    # A "real" terminal stdin needs select/kbhit to tell us when it's ready for
    # a nonblocking read().
    # Otherwise, assume a "safer" file-like object that can be read from in a
    # nonblocking fashion (e.g. a StringIO or regular file).
    if not has_fileno(input_):
        return True
    if sys.platform == "win32":
        return msvcrt.kbhit()
    else:
        reads, _, _ = select.select([input_], [], [], 0.0)
        return bool(reads and reads[0] is input_)


def bytes_to_read(input_: IO) -> int: