code: def plot_covariance_ellipse(
          mean, cov=None, variance=1.0, std=None,
          ellipse=None, title=None, axis_equal=True, show_semiaxis=False,
          facecolor=None, edgecolor=None,
          fc='none', ec='#004080',
          alpha=1.0, xlim=None, ylim=None,
          ls='solid'):
      
  
      warnings.warn("deprecated, use plot_covariance instead", DeprecationWarning)
      plot_covariance(mean=mean, cov=cov, variance=variance, std=std,
                      ellipse=ellipse, title=title, axis_equal=axis_equal,
                      show_semiaxis=show_semiaxis, facecolor=facecolor,
                      edgecolor=edgecolor, fc=fc, ec=ec, alpha=alpha,
                      xlim=xlim, ylim=ylim, ls=ls)
docs: Deprecated function to plot a covariance ellipse. Use plot_covariance
      instead.
  
      See Also
      --------
  
      plot_covariance