human
Solve the following python programming problem given the following code:
def _parse_lsof_output(self, out) : 
    def isopen(line) : 
        return (line.startswith ('f') and (('deleted' not in line) and ('mem' not in line) and ('txt' not in line) and ('cwd' not in line))) 
open_files = [] 
    for line in out.split ('
') : 
        if isopen (line) : 
            fields = line.split ('\x00') 
            fd = fields [0] [1 :] 
            filename = line [1] [1 :] 
            if filename.startswith ('/') : 
                open_files.append ((fd, filename)) 
return open_files 

    
    

    Fix the buggy line: filename = line [1] [1 :]
assistant
#Here is Python code to fix the buggy line: filename = line [1] [1 :]
.

filename = fields [1] [1 :]