class_docstr: ARPACK error
code: def __init__(self, info, infodict=_NAUPD_ERRORS):
      msg = infodict.get(info, "Unknown error")
      RuntimeError.__init__(self, "ARPACK error %d: %s" % (info, msg))
  
imports: from .None import _arpack
  import numpy
  import warnings
  from scipy.sparse.linalg.interface import aslinearoperator, LinearOperator
  from scipy.sparse import eye, issparse, isspmatrix, isspmatrix_csr
  from scipy.linalg import eig, eigh, lu_factor, lu_solve
  from scipy.sparse.sputils import isdense, is_pydata_spmatrix
  from scipy.sparse.linalg import gmres, splu
  from scipy.sparse.linalg.eigen.lobpcg import lobpcg
  from scipy._lib._util import _aligned_zeros
  from scipy._lib._threadsafety import ReentrancyLock
label_desc: Use image node_id 1 to create a new ArpackError object from inherited base classes: RuntimeError with example: obj = ArpackError(info, infodict)