On 2016-02-08 8:02 PM, Steven D'Aprano wrote:
On Mon, Feb 08, 2016 at 05:43:25PM -0500, Yury Selivanov wrote:
On 2016-02-08 5:19 PM, Terry Reedy wrote:
On 2/8/2016 4:51 PM, Victor Stinner wrote:
2016-02-08 22:28 GMT+01:00 Alexander Walters <tritium-l...@sdamon.com>:
What incantation do you need to do to make that behavior apparent?
I didn't know. I just checked. It's assert used with a non-empty tuple:
assert ("tuple",)
<stdin>:1: SyntaxWarning: assertion is always true, perhaps remove
parentheses?
I think this should be left to linters also.
I agree. I'd remove that warning.
Please don't remove the warning, it is very useful.
Compare an assertion written correctly:
py> assert 1==2, "Error in arithmetic"
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AssertionError: Error in arithmetic
with the simple mistake of wrapping the "tuple" in parens:
py> assert (1==2, "Error in arithmetic")
<stdin>:1: SyntaxWarning: assertion is always true, perhaps remove parentheses?
py>
You're right! It's indeed a trap that we should warn about.
Thanks!
Yury
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