human
Solve the following python programming problem given the following code:
def pipe(self, f, * args, **kwargs) : 
    "
        Generic composition function to enable expression pipelining

        >>> (expr
             .pipe(f, *args, **kwargs)
             .pipe(g, *args2, **kwargs2))

        is equivalent to

        >>> g(f(expr, *args, **kwargs), *args2, **kwargs2)

        Parameters
        ----------
        f : function or (function, arg_name) tuple
          If the expression needs to be passed as anything other than the first
          argument to the function, pass a tuple with the argument name. For
          example, (f, 'data') if the function f expects a 'data' keyword
        args : positional arguments
        kwargs : keyword arguments

        Examples
        --------
        >>> def foo(data, a=None, b=None):
                pass
        >>> def bar(a, b, data=None):
                pass
        >>> expr.pipe(foo, a=5, b=10)
        >>> expr.pipe((bar, 'data'), 1, 2)

        Returns
        -------
        result : result type of passed function
        " 
    if isinstance (f, tuple) : 
        (f, data_keyword) = f 
        kwargs = kwargs.copy () 
        kwargs [self] = self 
        return f (* args, ** kwargs) 
else : 
        return f (self, * args, ** kwargs) 

    
    

    Fix the buggy line: kwargs [self] = self
assistant
#Here is Python code to fix the buggy line: kwargs [self] = self
.

kwargs [data_keyword] = self