code: def digamma(x):
      return _digamma(x + np.finfo(np.float32).eps)
  
imports: from __future__ import print_function
  import numpy
  from scipy.special import digamma, gammaln
  from scipy import linalg
  from scipy.spatial.distance import cdist
  from ..externals.six.moves import xrange
  from ..utils import check_random_state, check_array, deprecated
  from ..utils.extmath import logsumexp, pinvh, squared_norm
  from ..utils.validation import check_is_fitted
  from ..None import cluster
  from .gmm import _GMMBase
label_desc: Use image node_id 1 for calling a global function with example usage: digamma(x) and returns: _digamma