On Thu, Oct 10, 2019 at 01:21:54PM +0100, Stefan Hajnoczi wrote:
> The following statement produces a SyntaxWarning with Python 3.8:
> 
>   if len(format) is 0:
>   scripts/tracetool/__init__.py:459: SyntaxWarning: "is" with a literal. Did you mean "=="?
> 
> Use the conventional len(x) == 0 syntax instead.
> 
> Reported-by: Daniel P. Berrangé <berrange@redhat.com>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
>  scripts/tracetool/__init__.py | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Thanks, applied to my tracing tree:
https://github.com/stefanha/qemu/commits/tracing

Stefan