code: def _is_real(A):
      try:
          if A.dtype == np.complex128:
              return False
          elif A.dtype == np.float64:
              return True
          else:
              raise _DTYPE_ERROR
      except AttributeError:
          raise _TYPE_ERROR
  
file_path: catboost/contrib/python/scipy/py2/scipy/linalg/interpolative.py
imports: import scipy.linalg._interpolative_backend
  import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: _is_real(A) and returns: False, True