pyo3 0.16.6

Bindings to Python interpreter
Documentation 
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//! Symbols used to denote deprecated usages of PyO3's proc macros.

#[deprecated(since = "0.15.0", note = "use `fn __call__` instead of `#[call]`")]
pub const CALL_ATTRIBUTE: () = ();

#[deprecated(
    since = "0.16.0",
    note = "implement a `__traverse__` `#[pymethod]` instead of using `gc` option"
)]
pub const PYCLASS_GC_OPTION: () = ();