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Implement isinstance(x, (A, B, ...)). Note that we only allow tuples,

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not other sequences (then we'd have to except strings, and we'd still
be susceptible to recursive attacks).
This commit is contained in:
Guido van Rossum 2001-10-07 20:54:12 +00:00
parent 1f733baa04
commit 03290ecbf1
2 changed files with 20 additions and 3 deletions
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6
Python/bltinmodule.c
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@ -1641,10 +1641,12 @@ builtin_isinstance(PyObject *self, PyObject *args)
}
static char isinstance_doc[] =
"isinstance(object, class-or-type) -> Boolean\n\
"isinstance(object, class-or-type-or-tuple) -> Boolean\n\
\n\
Return whether an object is an instance of a class or of a subclass thereof.\n\
With a type as second argument, return whether that is the object's type.";
With a type as second argument, return whether that is the object's type.\n\
The form using a tuple, isinstance(x, (A, B, ...)), is a shortcut for\n\
isinstance(x, A) or isinstance(x, B) or ... (etc.).";
static PyObject *