class_docstr: Abstract class defining required interface for var readers
docstr: Returns header 
docstr_tok: ["Returns","header"]
code: def read_header(self):
      """Returns header"""
      pass
  
imports: import numpy
  from scipy._lib import doccer
  from .None import _byteordercodes
label_desc: Use image node_id 2 for calling the MatVarReader obj's underlying member method code with example usage: obj.read_header() without return types