1 BaseException

     2  +-- SystemExit

     3  +-- KeyboardInterrupt

     4  +-- Exception

     5       +-- GeneratorExit

     6       +-- StopIteration

     7       +-- StandardError

     8       |    +-- ArithmeticError

     9       |    |    +-- FloatingPointError

    10       |    |    +-- OverflowError

    11       |    |    +-- ZeroDivisionError

    12       |    +-- AssertionError

    13       |    +-- AttributeError

    14       |    +-- EnvironmentError

    15       |    |    +-- IOError

    16       |    |    +-- OSError

    17       |    |         +-- WindowsError (Windows)

    18       |    |         +-- VMSError (VMS)

    19       |    +-- EOFError

    20       |    +-- ImportError

    21       |    +-- LookupError

    22       |    |    +-- IndexError

    23       |    |    +-- KeyError

    24       |    +-- MemoryError

    25       |    +-- NameError

    26       |    |    +-- UnboundLocalError

    27       |    +-- ReferenceError

    28       |    +-- RuntimeError

    29       |    |    +-- NotImplementedError

    30       |    +-- SyntaxError

    31       |    |    +-- IndentationError

    32       |    |         +-- TabError

    33       |    +-- SystemError

    34       |    +-- TypeError

    35       |    +-- ValueError

    36       |    |    +-- UnicodeError

    37       |    |         +-- UnicodeDecodeError

    38       |    |         +-- UnicodeEncodeError

    39       |    |         +-- UnicodeTranslateError

    40       +-- Warning

    41            +-- DeprecationWarning

    42            +-- PendingDeprecationWarning

    43            +-- RuntimeWarning

    44            +-- SyntaxWarning

    45            +-- UserWarning

    46            +-- FutureWarning

    47 	   +-- ImportWarning

    48 	   +-- UnicodeWarning