code: def compare_table_cols(a, b):
  	
  	return cmp(sorted((col.Name, col.Type) for col in a.getElementsByTagName(ligolw.Column.tagName)), sorted((col.Name, col.Type) for col in b.getElementsByTagName(ligolw.Column.tagName)))
docs: Return False if the two tables a and b have the same columns
  	(ignoring order) according to LIGO LW name conventions, return True
  	otherwise.