It is assumed that the underlying scalar objects have the operators already defined.
If you have defined a subclass MyExtensionArray(ExtensionArray), then use MyExtensionArray(ExtensionArray, ExtensionScalarOpsMixin) to get the arithmetic operators. After the definition of MyExtensionArray, insert the lines
MyExtensionArray._add_arithmetic_ops() MyExtensionArray._add_comparison_ops()
to link the operators to your class.
You may want to set __array_priority__
if you want your implementation to be called when involved in binary operations with NumPy arrays.
A mixin for defining ops on an ExtensionArray.
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