Inconsistent viewkeys behaviour
Terry Reedy
tjreedy at udel.edu
Mon Apr 28 06:28:48 EDT 2014
On 4/28/2014 2:22 AM, Joshua Landau wrote:
> Is there any reference for this strange behaviour on Python 2:
>
> >>> set() < dict().viewkeys()
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> TypeError: can only compare to a set
> >>> dict().viewkeys() > set()
> False
The left operand determines the result. The manual specifies that < and
> do not have to be consistent. But I suspect that when 3.x dict.keys()
was backported to 2.7.0, no one thought to update set, whereas the
backported key view code already had the comparison.
--
Terry Jan Reedy
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