class_docstr: Independence copula.
  
  Copula with independent random variables.
  
  .. math::
  
      C_      heta(u,v) = uv
  
  Parameters
  ----------
  k_dim : int
      Dimension, number of components in the multivariate random variable.
  
  Notes
  -----
  IndependenceCopula does not have copula parameters.
  If non-empty ``args`` are provided in methods, then a ValueError is raised.
  The ``args`` keyword is provided for a consistent interface across
  copulas.
code: def plot_pdf(self, *args):
      raise NotImplementedError("PDF is constant over the domain.")
  
file_path: statsmodels/statsmodels/distributions/copula/other_copulas.py
imports: import numpy
  from scipy import stats
  from statsmodels.tools.rng_qrng import check_random_state
  from statsmodels.distributions.copula.copulas import Copula
label_desc: Use image node_id 7 for calling the IndependenceCopula obj's underlying member method code with example usage: obj.plot_pdf() without return types