Ben North added the comment:
New patch including tests attached, against 3.3. Terry Reedy's example
above now gives
>>> d = {}
>>> d[1] = d.keys()
>>> d[2] = d.values()
>>> d
{1: dict_keys([1, 2]), 2: dict_values([dict_keys([1, 2]), ...])}
which I think is preferable.
Summary of patch:
dictobject.c:
dictview_repr() now uses a Py_ReprEnter() / Py_ReprLeave() pair to
check for recursion, and produces "..." if so. I think I've got the
behaviour correct in the case that PySequence_List() fails, but
couldn't find a way to trigger this in testing.
test_dictviews.py:
test_recursive_repr() checks for the correct string (containing
"...") rather than a RuntimeError.
test_deeply_nested_repr() is a new function, aiming to replace the
original test_recursive_repr(). It checks that a RuntimeError is
raised in the case of a non-recursive but deeply nested structure.
Under --with-pydebug,
./python -m test.regrtest -R20:30 test_dictviews
passes.
----------
Added file:
http://bugs.python.org/file31022/non-error-recursive-dictview-3.3.patch
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<http://bugs.python.org/issue18533>
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