human
Solve the following python programming problem given the following code:
def doIt(self, dbg) : 
    ' Converts request into completions ' 
    try : 
        remove_path = None 
        try : 
            import _completer 
except : 
            path = os.environ ['PYDEV_COMPLETER_PYTHONPATH'] 
            sys.path.append (path) 
            remove_path = path 
            import _completer 
try : 
            frame = pydevd_vars.findFrame (self.thread_id, self.frame_id) 
            updated_globals = dict () 
            updated_globals.update (frame.f_globals) 
            updated_globals.update (frame.f_locals) 
            completer = _completer.Completer (updated_globals, None) 
            completions = completer.complete (self.act_tok) 
            def makeValid(s) : 
                return pydevd_vars.makeValidXmlValue (pydevd_vars.quote (s, '/>_= \t')) 
msg = '<xml>' 
            for comp in completions : 
                msg += ('<comp p0="%s" p1="%s" p2="%s" p3="%s"/>' % (makeValid (comp [0]), makeValid (comp [1]), makeValid (comp [2]), makeValid (comp [3]))) 
msg += '</xml>' 
            cmd = dbg.cmdFactory.makeGetCompletionsMessage (self.sequence, msg) 
            dbg.writer.addCommand (cmd) 
finally : 
            if (self is not None) : 
                sys.path.remove (remove_path) 
except : 
        exc = GetExceptionTracebackStr () 
        sys.stderr.write (('%s
' % (exc,))) 
        cmd = dbg.cmdFactory.makeErrorMessage (self.sequence, ('Error evaluating expression ' + exc)) 
        dbg.writer.addCommand (cmd) 

    
    

    Fix the buggy line: if (self is not None) :
assistant
#Here is Python program to fix the buggy line: if (self is not None) :
.

if (remove_path is not None) :