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1"""asyncio exceptions."""2 3 4__all__ = ('CancelledError', 'InvalidStateError', 'TimeoutError',5           'IncompleteReadError', 'LimitOverrunError',6           'SendfileNotAvailableError')7 8 9class CancelledError(BaseException):10    """The Future or Task was cancelled."""11 12 13class TimeoutError(Exception):14    """The operation exceeded the given deadline."""15 16 17class InvalidStateError(Exception):18    """The operation is not allowed in this state."""19 20 21class SendfileNotAvailableError(RuntimeError):22    """Sendfile syscall is not available.23 24    Raised if OS does not support sendfile syscall for given socket or25    file type.26    """27 28 29class IncompleteReadError(EOFError):30    """31    Incomplete read error. Attributes:32 33    - partial: read bytes string before the end of stream was reached34    - expected: total number of expected bytes (or None if unknown)35    """36    def __init__(self, partial, expected):37        r_expected = 'undefined' if expected is None else repr(expected)38        super().__init__(f'{len(partial)} bytes read on a total of '39                         f'{r_expected} expected bytes')40        self.partial = partial41        self.expected = expected42 43    def __reduce__(self):44        return type(self), (self.partial, self.expected)45 46 47class LimitOverrunError(Exception):48    """Reached the buffer limit while looking for a separator.49 50    Attributes:51    - consumed: total number of to be consumed bytes.52    """53    def __init__(self, message, consumed):54        super().__init__(message)55        self.consumed = consumed56 57    def __reduce__(self):58        return type(self), (self.args[0], self.consumed)59