human
Solve the following python programming problem given the following code:
def connection_memoize(key) : 
    'Decorator, memoize a function in a connection.info stash.

    Only applicable to functions which take no arguments other than a
    connection.  The memo will be stored in ``connection.info[key]``.
    ' 
    @ util.decorator 
    def decorated(fn, self, connection) : 
        connection = connection.connect () 
        try : 
            return connection.info [key] 
except KeyError : 
            connection.info [key] = val = fn (self, connection) 
            return val 
return key 

    
    

    Fix the buggy line: return key
assistant
#Here is Python code to fix the buggy line: return key
.

return def decorated(