human
Solve the following python programming problem given the following code:
@ unittest.skip ('Reverted the fix for #2281. Unskip this once we use GUIDs for keys in the download counts collection') 
def test_update_counters_different_files(self) : 
    @ analytics.update_counters ('download:{target_id}:{fid}', db = self.db) 
    def download_file_(**kwargs) : 
        return (kwargs.get ('node') or kwargs.get ('project')) 
fid1 = 'test.analytics.py' 
    fid2 = 'test_analytics.py' 
    download_file_ (node = self.node, fid = fid1) 
    count = analytics.get_basic_counters ('download:{0}:{1}'.format (self.node, fid1), db = self.db) 
    assert_equal (count, (1, 1)) 
    count = analytics.get_basic_counters ('download:{0}:{1}'.format (self.node, fid2), db = self.db) 
    assert_equal (count, (None, None)) 
    page = 'download:{0}:{1}'.format (self.node, download_file_) 
    session.data ['visited'].append (page) 
    download_file_ (node = self.node, fid = fid1) 
    download_file_ (node = self.node, fid = fid2) 
    count = analytics.get_basic_counters ('download:{0}:{1}'.format (self.node, fid1), db = self.db) 
    assert_equal (count, (1, 2)) 
    count = analytics.get_basic_counters ('download:{0}:{1}'.format (self.node, fid2), db = self.db) 
    assert_equal (count, (1, 1)) 

    
    

    Fix the buggy line: page = 'download:{0}:{1}'.format (self.node, download_file_)
assistant
#Here is Python program to fix the buggy line: page = 'download:{0}:{1}'.

page = 'download:{0}:{1}'.format (self.node, fid1)