human
Solve the following python programming problem given the following code:
@ classmethod 
@ contextlib.contextmanager 
def record(cls, filename, indentation = 4, encoding = 'utf-8') : 
    try : 
        import urllib3 
except ImportError : 
        msg = 'HTTPretty requires urllib3 installed for recording actual requests.' 
        raise RuntimeError (msg) 
http = urllib3.PoolManager () 
    cls.enable () 
    calls = [] 
    def record_request(request, uri, headers) : 
        cls.disable () 
        response = http.request (request.method, uri) 
        calls.append ({ 
            'request' : { 
                'uri' : uri, 
                'method' : request.method, 
                'headers' : dict (request.headers), 
                'body' : decode_utf8 (request.body), 
                'querystring' : request.querystring, 
}, 
            'response' : { 
                'status' : response.status, 
                'body' : decode_utf8 (response.data), 
                'headers' : dict (response.headers), 
}, 
}) 
        cls.enable () 
        return (response.status, response.headers, response.data) 
for method in f.METHODS : 
        cls.register_uri (method, MULTILINE_ANY_REGEX, body = record_request) 
(yield) 
    cls.disable () 
    with codecs.open (filename, 'w', encoding) as f : 
        f.write (json.dumps (calls, indent = indentation)) 

    
    

    Fix the buggy line: for method in f.METHODS :
assistant
#Here is Python program to fix the buggy line: for method in f.

for method in cls.METHODS :