>>> from liblas import schema
  >>> from liblas import header
  >>> from liblas import file
  
  >>> f2 = file.File('../test/data/TO_core_last_clip.las')


  >>> f = schema.Schema()
  >>> f.size
  20
  

  >>> h = f2.header
  >>> f = h.schema
  
  >>> h.version
  '1.0'
  
  >>> f.size
  28

  
  >>> h = header.Header()
  >>> f = h.schema

  
  >>> f.size
  34



  >>> h.schema = f
  
  >>> h.data_record_length
  34