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[API Compatibility] Support tensor dtype compare using is #76155

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Merged
merged 2 commits into from
Nov 4, 2025
Merged

[API Compatibility] Support tensor dtype compare using is #76155

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128d2c5
[API Compatibility] Support tensor dtype compare using `is`
huangjiyi Oct 31, 2025
9af150a
fix
huangjiyi Nov 3, 2025
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11 changes: 8 additions & 3 deletions paddle/fluid/pybind/eager_utils.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -1087,9 +1087,14 @@ PyObject* ToPyObject(const phi::DenseTensor* value) {
}

PyObject* ToPyObject(const phi::DataType& dtype) {
auto obj = ::pybind11::cast(dtype);
obj.inc_ref();
return obj.ptr();
static const std::vector<std::string> dtype_names = {
"UNDEFINED", "BOOL", "UINT8", "INT8", "UINT16",
"INT16", "UINT32", "INT32", "UINT64", "INT64",
"FLOAT32", "FLOAT64", "COMPLEX64", "COMPLEX128", "FLOAT16",
"BFLOAT16", "FLOAT8_E4M3FN", "FLOAT8_E5M2", "PSTRING",
};
return PyObject_GetAttrString(reinterpret_cast<PyObject*>(g_data_type_pytype),
dtype_names[static_cast<int>(dtype)].c_str());
}

PyObject* ToPyObject(const std::vector<phi::DataType>& dtypes) {
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14 changes: 14 additions & 0 deletions test/legacy_test/test_eager_tensor.py
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Expand Up @@ -1283,6 +1283,20 @@ def test_print_tensor_dtype(self):

self.assertEqual(a_str, expected)

def test_tensor_dtype_compare(self):
a = paddle.randn([2], dtype="float32")
b = paddle.randn([2], dtype="float32")
c = paddle.randn([2], dtype="float64")

self.assertTrue(a.dtype == paddle.float32)
self.assertTrue(a.dtype == b.dtype)
self.assertTrue(a.dtype != paddle.float64)
self.assertTrue(a.dtype != c.dtype)
self.assertTrue(a.dtype is paddle.float32)
self.assertTrue(a.dtype is b.dtype)
self.assertTrue(a.dtype is not paddle.float64)
self.assertTrue(a.dtype is not c.dtype)

def test___cuda_array_interface__(self):
"""test Tensor.__cuda_array_interface__"""
with dygraph_guard():
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