4.1 Standard Exceptions

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4.1 Standard Exceptions

All standard Python exceptions are available as global variables whose names are "`PyExc_`" followed by the Python exception name. These have the type `PyObject*`; they are all class objects. For completeness, here are all the variables:

C Name | Python Name | Notes
--- | --- | ---
`PyExc_BaseException` | `BaseException` | (1), (4)
`PyExc_Exception` | `Exception` | (1)
`PyExc_StandardError` | `StandardError` | (1)
`PyExc_ArithmeticError` | `ArithmeticError` | (1)
`PyExc_LookupError` | `LookupError` | (1)
`PyExc_AssertionError` | `AssertionError` |
`PyExc_AttributeError` | `AttributeError` |
`PyExc_EOFError` | `EOFError` |
`PyExc_EnvironmentError` | `EnvironmentError` | (1)
`PyExc_FloatingPointError` | `FloatingPointError` |
`PyExc_IOError` | `IOError` |
`PyExc_ImportError` | `ImportError` |
`PyExc_IndexError` | `IndexError` |
`PyExc_KeyError` | `KeyError` |
`PyExc_KeyboardInterrupt` | `KeyboardInterrupt` |
`PyExc_MemoryError` | `MemoryError` |
`PyExc_NameError` | `NameError` |
`PyExc_NotImplementedError` | `NotImplementedError` |
`PyExc_OSError` | `OSError` |
`PyExc_OverflowError` | `OverflowError` |
`PyExc_ReferenceError` | `ReferenceError` | (2)
`PyExc_RuntimeError` | `RuntimeError` |
`PyExc_SyntaxError` | `SyntaxError` |
`PyExc_SystemError` | `SystemError` |
`PyExc_SystemExit` | `SystemExit` |
`PyExc_TypeError` | `TypeError` |
`PyExc_ValueError` | `ValueError` |
`PyExc_WindowsError` | `WindowsError` | (3)
`PyExc_ZeroDivisionError` | `ZeroDivisionError` |

Notes:

(1)
  This is a base class for other standard exceptions.

(2)
  This is the same as `weakref.ReferenceError`.

(3)
  Only defined on Windows; protect code that uses this by testing that the preprocessor macro `MS_WINDOWS` is defined.

(4)
  New in version 2.5.