Quotes About MRO

This search order is called the new-style MRO for "method resolution order" (and often just MRO for short when used in contrast with the DFLR order). Despite the name, this is used for all attributes in Python, not just methods.

In new-style classes (optional in 2.X and standard in 3.X), the attribute search is usually as before, but in diamond patterns proceeds across by tree levels before moving up, in a more breadth-first fashion. This order is usually called the new-style MRO, for method resolution order, though it's used for all attributes, not just methods.