code: def z2r(z):
      
      with np.errstate(invalid='ignore', divide='ignore'):
          return (np.exp(2 * z) - 1) / (np.exp(2 * z) + 1)
docs: Function that calculates the inverse Fisher z-transformation
  
      Parameters
      ----------
      z : int or ndarray
          Fishers z transformed correlation value
  
      Returns
      ----------
      result : int or ndarray
          Correlation value