[FEA] dt.total_seconds

[MarcoGorelli]

Is your feature request related to a problem? Please describe.

I wish I could use cuDF to do .dt.total_seconds on a timedelta column

Describe the solution you'd like

.dt.total_seconds

Describe alternatives you've considered

Additional context

We're (for now) xfailing tests in Narwhals narwhals-dev/narwhals#951

[mroeschke]

Thanks for the report!

Although this could be easily implemented by summing the timedelta components, I think there was a desire to implement a dedicated libcudf kernel for total_seconds to avoid the n kernel launches to sum each individual component (IIRC cc @bdice you may have been apart of that passing discussion somewhere)