def __copy__(self):
        self.pull()
        return copy.copy(self._header)
Get the distance between two nodes
dataset/ETHPy150Open grantbrown/laspy/laspy/header.py/HeaderManager.__copy__--crossover with--dataset/ETHPy150Open biocore/scikit-bio/skbio/tree/tests/test_tree.py/TreeTests.test_distance