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kronos-venv/lib/python3.12/site-packages/sympy/polys/domains/domainelement.py

@@ -0,0 +1,38 @@
+"""Trait for implementing domain elements. """
+
+
+from sympy.utilities import public
+
+@public
+class DomainElement:
+    """
+    Represents an element of a domain.
+
+    Mix in this trait into a class whose instances should be recognized as
+    elements of a domain. Method ``parent()`` gives that domain.
+    """
+
+    __slots__ = ()
+
+    def parent(self):
+        """Get the domain associated with ``self``
+
+        Examples
+        ========
+
+        >>> from sympy import ZZ, symbols
+        >>> x, y = symbols('x, y')
+        >>> K = ZZ[x,y]
+        >>> p = K(x)**2 + K(y)**2
+        >>> p
+        x**2 + y**2
+        >>> p.parent()
+        ZZ[x,y]
+
+        Notes
+        =====
+
+        This is used by :py:meth:`~.Domain.convert` to identify the domain
+        associated with a domain element.
+        """
+        raise NotImplementedError("abstract method")