Add 'contains' method to PyAny impl.
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@ -682,6 +682,24 @@ impl PyAny {
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self.is_instance(T::type_object(self.py()))
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}
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/// Determines if self contains `value`.
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///
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/// This is equivalent to the Python expression `value in self`.
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#[inline]
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pub fn contains<V>(&self, value: V) -> PyResult<bool>
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where
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V: ToBorrowedObject,
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{
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let r = value.with_borrowed_ptr(self.py(), |ptr| unsafe {
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ffi::PySequence_Contains(self.as_ptr(), ptr)
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});
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match r {
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0 => Ok(false),
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1 => Ok(true),
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_ => Err(PyErr::fetch(self.py())),
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}
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}
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/// Returns a GIL marker constrained to the lifetime of this type.
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#[inline]
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pub fn py(&self) -> Python<'_> {
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@ -797,4 +815,26 @@ class SimpleClass:
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assert!(l.is_instance(PyList::type_object(py)).unwrap());
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});
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}
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#[test]
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fn test_any_contains() {
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Python::with_gil(|py| {
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let v: Vec<i32> = vec![1, 1, 2, 3, 5, 8];
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let ob = v.to_object(py).into_ref(py);
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let bad_needle = 7i32.to_object(py);
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assert!(!ob.contains(&bad_needle).unwrap());
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let good_needle = 8i32.to_object(py);
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assert!(ob.contains(&good_needle).unwrap());
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let type_coerced_needle = 8f32.to_object(py);
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assert!(ob.contains(&type_coerced_needle).unwrap());
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let n: u32 = 42;
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let bad_haystack = n.to_object(py).into_ref(py);
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let irrelevant_needle = 0i32.to_object(py);
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assert!(bad_haystack.contains(&irrelevant_needle).is_err());
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});
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}
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}
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