#NEWLINE# def std( self , ddof = 1 , **kwargs ) : #NEWLINE# #INDENT# window = self . _get_window ( ) #NEWLINE# def f( arg , * args , **kwargs ) : #NEWLINE# #INDENT# minp = _require_min_periods ( 1 ) ( self . min_periods , window ) #NEWLINE# return _zsqrt ( algos . roll_var ( arg , window , minp , ddof ) ) #NEWLINE# #UNINDENT# return self . _apply ( f , 'std' , check_minp = _require_min_periods ( 1 ) , ddof = ddof , ** kwargs )