fix isclose mixin (#15898)

use `.eq` instead of `==`

test/null/test_tensor_uop_mixin.py

@@ -31,6 +31,10 @@ class TestTensorUOpBinop(unittest.TestCase):
   def test_div_broadcast_tensor_by_tensor(self):
     a, b = _t(3, 4).float(), _t(4).float() + 1
     self.assertIs(_strip_unique((a/b).uop), _strip_unique(a.uop/b.uop))
+  # isclose used `self == other` which is Python identity on UOp (not elementwise); now uses .eq().
+  def test_isclose(self):
+    t = _t(4).float()
+    self.assertIs(_strip_unique(t.isclose(t).uop), _strip_unique(t.uop.isclose(t.uop)))
 
 class TestTensorUOpGetitem(unittest.TestCase):
   # ---- pure slice patterns ----

tinygrad/mixin/elementwise.py

@@ -567,7 +567,7 @@ class ElementwiseMixin(DTypeMixin, CreationMixin):
     ```
     """
     is_finite_close = self.isfinite() & other.isfinite() & ((self - other).abs() <= atol + rtol * other.abs())
-    is_infinite_close = (self.isinf() | other.isinf()) & (self == other)
+    is_infinite_close = (self.isinf() | other.isinf()) & self.eq(other)
     is_nan_close = (self.isnan() & other.isnan()) & equal_nan
     return is_finite_close | is_infinite_close | is_nan_close