numpy_copysign (#9238)

Co-authored-by: nassimberrada <Nassim>

ivy/functional/frontends/numpy/mathematical_functions/miscellaneous.py

@@ -286,3 +286,25 @@ def interp_inner(value):
         return ivy.astype(ivy.array(ret[0]), "float64")
     else:
         return ivy.astype(ivy.array(ret), "float64")
+
+
+@handle_numpy_dtype
+@to_ivy_arrays_and_back
+@handle_numpy_casting
+@from_zero_dim_arrays_to_scalar
+def copysign(
+    x1,
+    x2,
+    /,
+    out=None,
+    *,
+    where=True,
+    casting="same_kind",
+    order="k",
+    dtype=None,
+    subok=True,
+):
+    ret = ivy.copysign(x1, x2, out=out)
+    if ivy.is_array(where):
+        ret = ivy.where(where, ret, ivy.default(out, ivy.zeros_like(ret)), out=out)
+    return ret

ivy_tests/test_ivy/test_frontends/test_numpy/test_mathematical_functions/test_miscellaneous.py

@@ -603,3 +603,60 @@ def test_numpy_convolve(
         v=xs[1],
         mode=mode,
     )
+
+
+# copysign
+@handle_frontend_test(
+    fn_tree="numpy.copysign",
+    dtypes_values_casting=np_frontend_helpers.dtypes_values_casting_dtype(
+        arr_func=[
+            lambda: helpers.dtype_and_values(
+                available_dtypes=helpers.get_dtypes("float"),
+                num_arrays=2,
+                shared_dtype=True,
+                min_value=-100,
+                max_value=100,
+            )
+        ],
+        get_dtypes_kind="float",
+    ),
+    where=np_frontend_helpers.where(),
+)
+def test_numpy_copysign(
+    dtypes_values_casting,
+    where,
+    as_variable,
+    with_out,
+    num_positional_args,
+    native_array,
+    frontend,
+    fn_tree,
+    on_device,
+):
+    input_dtype, xs, casting, dtype = dtypes_values_casting
+    where, as_variable, native_array = np_frontend_helpers.handle_where_and_array_bools(
+        where=where,
+        input_dtype=input_dtype,
+        as_variable=as_variable,
+        native_array=native_array,
+    )
+    np_frontend_helpers.test_frontend_function(
+        input_dtypes=input_dtype,
+        as_variable_flags=as_variable,
+        with_out=with_out,
+        num_positional_args=num_positional_args,
+        native_array_flags=native_array,
+        frontend=frontend,
+        fn_tree=fn_tree,
+        on_device=on_device,
+        rtol=1e-2,
+        atol=1e-2,
+        x1=xs[0],
+        x2=xs[1],
+        out=None,
+        where=where,
+        casting=casting,
+        order="K",
+        dtype=dtype,
+        subok=True,
+    )