Merge pull request #547 from bashtage/flake8-fixes

MAINT: Upadte type comparrison

Author: bashtage

linearmodels/panel/utility.py

@@ -76,7 +76,7 @@ def preconditioner(
     """
     # Dense path
     if not sp.issparse(d):
-        klass = None if type(d) == np.ndarray else d.__class__
+        klass = None if type(d) is np.ndarray else d.__class__
         d_id = id(d)
         d = np.asarray(d)
         if id(d) == d_id or copy:

linearmodels/tests/panel/test_utility.py

@@ -216,11 +216,11 @@ class SubArray(np.ndarray):
     values = values.view(SubArray)
     val_cond, cond = preconditioner(values, copy=True)
     assert_allclose(np.sqrt((values**2).sum(0)), cond)
-    assert type(val_cond) == type(values)
+    assert type(val_cond) is type(values)
     # Test in-place
     val_cond, cond = preconditioner(values, copy=False)
     assert_allclose(np.sqrt((values**2).sum(0)), np.ones(10))
-    assert type(val_cond) == type(values)
+    assert type(val_cond) is type(values)
 
 
 @pytest.mark.parametrize("missing", [0, 0.2])