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class UnpackException(Exception):
    """Base class for some exceptions raised while unpacking.

NOTE: unpack may raise exception other than subclass of
    UnpackException.  If you want to catch all error, catch
    Exception instead.
    """

class BufferFull(UnpackException):
    pass

class OutOfData(UnpackException):
    pass

class FormatError(ValueError, UnpackException):
    """Invalid msgpack format"""

class StackError(ValueError, UnpackException):
    """Too nested"""

# Deprecated.  Use ValueError instead
UnpackValueError = ValueError

class ExtraData(UnpackValueError):
    """ExtraData is raised when there is trailing data.

This exception is raised while only one-shot (not streaming)
    unpack.
    """

def __init__(self, unpacked, extra):
        self.unpacked = unpacked
        self.extra = extra

def __str__(self):
        return "unpack(b) received extra data."

# Deprecated.  Use Exception instead to catch all exception during packing.
PackException = Exception
PackValueError = ValueError
PackOverflowError = OverflowError