human
Solve the following python programming problem given the following code:
def _export_csv(self, return_url) : 
    '
            Export a CSV of records as a stream.
        ' 
    (count, data) = self._export_data () 
    class Echo (object) : 
        '
            An object that implements just the write method of the file-like
            interface.
            ' 
        def write(self, value) : 
            '
                Write the value by returning it, instead of storing
                in a buffer.
                ' 
            return value 
writer = csv.writer (Echo ()) 
    def generate() : 
        titles = [csv_encode (c [1]) for c in self._export_columns] 
        (yield writer.writerow (titles)) 
        for row in data : 
            vals = [csv_encode (self.get_export_value (row, c [0])) for c in self._export_columns] 
            (yield writer.writerow (vals)) 
filename = self.get_export_name (export_type = 'csv') 
    disposition = ('attachment;filename=%s' % (secure_filename (self),)) 
    return Response (stream_with_context (generate ()), headers = { 
        'Content-Disposition' : disposition, 
}, mimetype = 'text/csv') 

    
    

    Fix the buggy line: disposition = ('attachment;filename=%s' % (secure_filename (self),))
assistant
#Here is Python program to fix the buggy line: disposition = ('attachment;filename=%s' % (secure_filename (self),))
.

disposition = ('attachment;filename=%s' % (secure_filename (filename),))