Steven Barker added the comment:
Ah, I figured out why using %R may be bad. It breaks for the following silly
class:
class C():
def __repr__(self):
return repr(self.__repr__) # or use any other bound method
repr(C()) will recurse until the recursion limit is hit, both with and without
my patch. If this seems like a real issue, I could probably replace the %R code
with a variation on the base case code in PyObject_Repr:
PyUnicode_FromFormat("<%s object at %p>",
v->ob_type->tp_name, v)
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<http://bugs.python.org/issue21389>
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