[Answered ]-Use a parameter attribute as a default value for another parameter?

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Use None as the default argument and then check in the body of the function for None.

def supplier_default_product(region, supplier=None):
    if supplier is None:
        supplier = region.default_supplier.id
    default_product_instance = Product.objects.get(name=default_product, supplier=supplier)

You can’t reference an attribute of another argument, because the default argument values are set at define time, which only happens once.

👤Morgan Thrapp

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