#NEWLINE# def _fix_single_element( self ) : #NEWLINE# #INDENT# this_element = self [ 0 ] . fix ( ) #NEWLINE# if ( this_element is None ) : #NEWLINE# #INDENT# return None #NEWLINE# #UNINDENT# self [ 0 ] = this_element #NEWLINE# if isinstance ( this_element , Unit ) : #NEWLINE# #INDENT# return self . fix_nest ( ) #NEWLINE# #UNINDENT# return self