Previously, the __getattribute__ method was over-loaded in sum_dists to allow Iminuit to introspect parameter names; however, this implementation incorrectly rewrapped the object which prevented pickling a sum_dist object. By correctly setting the attributes for sum_dists methods using setattr during the initialization, each class method now has a _parameters attribute that Iminuit can use to get parameter names -- it also allows for pickling.
Previously, the
__getattribute__method was over-loaded insum_diststo allow Iminuit to introspect parameter names; however, this implementation incorrectly rewrapped the object which prevented pickling asum_distobject. By correctly setting the attributes forsum_distsmethods usingsetattrduring the initialization, each class method now has a_parametersattribute that Iminuit can use to get parameter names -- it also allows for pickling.