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How does a + b dispatch in Python?

Q: How does a + b dispatch in Python?

Operators are **method calls** in disguise. `a + b` asks the **left** operand first, then falls back to the **right** operand's *reflected* method: a + b a.__add__(b) left operand first b.__radd__(a) <text class='d-sub' x='260' y='150' text-anchor='mid

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add and reflected radd.

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PY__radd__ makes the builtin-on-the-left case work

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