1 BaseException

     2  +-- SystemExit

     3  +-- KeyboardInterrupt

     4  +-- GeneratorExit

     5  +-- Exception

     6       +-- StopIteration

     7       +-- StandardError

     8       |    +-- BufferError

     9       |    +-- ArithmeticError

    10       |    |    +-- FloatingPointError

    11       |    |    +-- OverflowError

    12       |    |    +-- ZeroDivisionError

    13       |    +-- AssertionError

    14       |    +-- AttributeError

    15       |    +-- EnvironmentError

    16       |    |    +-- IOError

    17       |    |    +-- OSError

    18       |    |         +-- WindowsError (Windows)

    19       |    |         +-- VMSError (VMS)

    20       |    +-- EOFError

    21       |    +-- ImportError

    22       |    +-- LookupError

    23       |    |    +-- IndexError

    24       |    |    +-- KeyError

    25       |    +-- MemoryError

    26       |    +-- NameError

    27       |    |    +-- UnboundLocalError

    28       |    +-- ReferenceError

    29       |    +-- RuntimeError

    30       |    |    +-- NotImplementedError

    31       |    +-- SyntaxError

    32       |    |    +-- IndentationError

    33       |    |         +-- TabError

    34       |    +-- SystemError

    35       |    +-- TypeError

    36       |    +-- ValueError

    37       |         +-- UnicodeError

    38       |              +-- UnicodeDecodeError

    39       |              +-- UnicodeEncodeError

    40       |              +-- UnicodeTranslateError

    41       +-- Warning

    42            +-- DeprecationWarning

    43            +-- PendingDeprecationWarning

    44            +-- RuntimeWarning

    45            +-- SyntaxWarning

    46            +-- UserWarning

    47            +-- FutureWarning

    48 	   +-- ImportWarning

    49 	   +-- UnicodeWarning

    50 	   +-- BytesWarning