code: def is_real_type(X):
      """Check if matrices are real type.
  
      Parameters
      ----------
      X : ndarray, shape (..., n, m)
          The set of matrices.
  
      Returns
      -------
      ret : boolean
          True if matrices are real type.
  
      Notes
      -----
      .. versionadded:: 0.6
      """
      return np.isrealobj(X)
  
file_path: pyRiemann/pyriemann/utils/test.py
imports: import numpy
label_desc: Use image node_id 6 for calling a global function with example usage: is_real_type(X) and returns: np