@classmethod
    def setupClass(cls):
        global np
        global eigvals
        try:
            import numpy as np
            from numpy.linalg import eigvals
        except __HOLE__:
            raise SkipTest('NumPy not available.')
dataset/ETHPy150Open gkno/gkno_launcher/src/networkx/algorithms/centrality/tests/test_katz_centrality.py/TestKatzEigenvectorVKatz.setupClass