error: lifetime may not live long enough
 --> tests/ui/static_ref.rs:4:1
  |
4 | #[pyfunction]
  | ^^^^^^^^^^^^^
  | |
  | lifetime `'py` defined here
  | cast requires that `'py` must outlive `'static`
  |
  = note: this error originates in the attribute macro `pyfunction` (in Nightly builds, run with -Z macro-backtrace for more info)