added paddle.nanmean function frontend and test for it (ivy-llc#23278)

ivy/functional/frontends/paddle/math.py

@@ -376,6 +376,12 @@ def multiply(x, y, name=None):
     return ivy.multiply(x, y)
 
 
+@with_supported_dtypes({"2.5.1 and below": ("float32", "float64")}, "paddle")
+@to_ivy_arrays_and_back
+def nanmean(x, axis=None, keepdims=False):
+    return ivy.nanmean(x, axis=axis, keepdims=keepdims)
+
+
 @with_supported_dtypes(
     {"2.5.1 and below": ("float32", "float64", "int32", "int64")}, "paddle"
 )

ivy_tests/test_ivy/test_frontends/test_paddle/test_math.py

@@ -1622,6 +1622,37 @@ def test_paddle_multiply(
     )
 
 
+@handle_frontend_test(
+    fn_tree="paddle.nanmean",
+    dtype_and_x=helpers.dtype_and_values(
+        available_dtypes=helpers.get_dtypes("valid"),
+        num_arrays=1,
+        allow_nan=True,
+    ),
+)
+def test_paddle_nanmean(
+    *,
+    dtype_and_x,
+    on_device,
+    fn_tree,
+    frontend,
+    backend_fw,
+    test_flags,
+):
+    input_dtype, x = dtype_and_x
+    helpers.test_frontend_function(
+        input_dtypes=input_dtype,
+        backend_to_test=backend_fw,
+        frontend=frontend,
+        fn_tree=fn_tree,
+        test_flags=test_flags,
+        on_device=on_device,
+        x=x[0],
+        rtol=1e-04,
+        atol=1e-04,
+    )
+
+
 # nansum
 @handle_frontend_test(
     fn_tree="paddle.nansum",