3 dB@sNdZddlZdddddgZdd dZdd dZdd dZd dZdd dZdS)z Eigenvalue spectrum of graphs. Nlaplacian_spectrumadjacency_spectrummodularity_spectrumnormalized_laplacian_spectrumbethe_hessian_spectrumweightcCs"ddlm}|tj||djS)aReturns eigenvalues of the Laplacian of G Parameters ---------- G : graph A NetworkX graph weight : string or None, optional (default='weight') The edge data key used to compute each value in the matrix. If None, then each edge has weight 1. Returns ------- evals : NumPy array Eigenvalues Notes ----- For MultiGraph/MultiDiGraph, the edges weights are summed. See to_numpy_array for other options. See Also -------- laplacian_matrix r)eigvalsh)r) scipy.linalgrnxZlaplacian_matrixtodense)Grrr s