human
Solve the following python programming problem given the following code:
def test_duplicate_open_filters(self) : 
    'Test that only one open() filter can be used.
        ' 
    class OpenFilter (Filter) : 
        def open(self, * a, **kw) : 
            pass 
def __init__(self, id) : 
            Filter.__init__ (self) 
            self.id = id 
def id(self) : 
            return self.id 
self.create_files (set ('xyz')) 
    bundle = self.mkbundle ('xyz', filters = (OpenFilter ('a'), OpenFilter ('b'))) 
    assert_raises (BuildError, self.build) 

    
    

    Fix the buggy line: assert_raises (BuildError, self.build)
assistant
#Here is Python program to fix the buggy line: assert_raises (BuildError, self.

assert_raises (BuildError, bundle.build)