human
Solve the following python programming problem given the following code:
def _add_postfix(self, constructed_dir) : 
    def _append_slash_if_needed(path) : 
        if (path [(- 1)] != '/') : 
            path += '/' 
return path 
constructed_dir = _append_slash_if_needed (self) 
    if CONF.job_workflow_postfix : 
        constructed_dir = ''.join ([str (constructed_dir), str (CONF.job_workflow_postfix)]) 
return _append_slash_if_needed (constructed_dir) 

    
    

    Fix the buggy line: constructed_dir = _append_slash_if_needed (self)
assistant
#Here is Python code to fix the buggy line: constructed_dir = _append_slash_if_needed (self)
.

constructed_dir = _append_slash_if_needed (constructed_dir)