class_docstr: requires theta >=1
class_docstr_tok: ["requires","theta",">","=1"]
code: def inverse(self, phi, theta):
      return np.exp(-np.power(phi, 1.0 / theta))
  
imports: import warnings
  import numpy
  from scipy.special import expm1, gamma
label_desc: Use image node_id 3 for calling the TransfGumbel obj's underlying member method code with example usage: obj.inverse(phi, theta) and returns: np