pymbolic/mapper/constant_converter.py

-from __future__ import division
+from __future__ import annotations
+
 
 __copyright__ = "Copyright (C) 2017 Andreas Kloeckner"
 
@@ -26,7 +27,7 @@ import pymbolic.mapper
 
 
 class ConstantToNumpyConversionMapper(pymbolic.mapper.IdentityMapper):
-    """Because of `this numpy bug <https://github.com/numpy/numpy/issues/9438>`_,
+    """Because of `this numpy bug <https://github.com/numpy/numpy/issues/9438>`__,
     sized :mod:`numpy` number (i.e. ones with definite bit width, such as
     :class:`numpy.complex64`) have a low likelihood of surviving expression
     construction.
@@ -44,12 +45,11 @@ class ConstantToNumpyConversionMapper(pymbolic.mapper.IdentityMapper):
                 complex_type = np.complex64
             elif real_type is np.float64:
                 complex_type = np.complex128
-            elif real_type is np.float128:
-                complex_type = np.complex256
+            elif real_type is np.float128:  # pylint:disable=no-member
+                complex_type = np.complex256  # pylint:disable=no-member
             else:
-                raise TypeError(
-                        "unable to determine corresponding complex type for '%s'"
-                        % real_type.__name__)
+                raise TypeError("unable to determine corresponding complex type "
+                        f"for '{real_type.__name__}'")
 
         self.complex_type = complex_type