| @@ -253,9 +253,10 @@ is found that matches the exception. An expression-less except clause, if |
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present, must be last; it matches any exception. For an except clause with an |
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expression, that expression is evaluated, and the clause matches the exception |
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if the resulting object is "compatible" with the exception. An object is |
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-compatible with an exception if it is the class or a base class of the exception |
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-object, or a tuple containing an item that is the class or a base class of |
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-the exception object. |
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+compatible with an exception if the object is the class or a |
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+:term:`non-virtual base class ` of the exception object, |
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+or a tuple containing an item that is the class or a non-virtual base class |
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+of the exception object. |
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If no except clause matches the exception, the search for an exception handler |
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continues in the surrounding code and on the invocation stack. [#]_ |