human
Solve the following python programming problem given the following code:
def _analyze_trace(self, trace) : 
    "
        Parse protocol trace captured by fake connection, making some
        assertions along the way, and return results  as a dict of form:
        results = {'tx_missing': <list of messages>,
                   'rx_missing': <list of messages>,
                   'tx_updates': <list of subreqs>,
                   'rx_updates': <list of messages>}

        Each subreq is a dict with keys: 'method', 'path', 'headers', 'body'
        " 
    def tx_missing(results, line) : 
        self.assertEqual ('tx', line [0]) 
        results ['tx_missing'].append (line [1]) 
def rx_missing(results, line) : 
        self.assertEqual ('rx', line [0]) 
        parts = line [1].split ('\r
') 
        for part in parts : 
            results ['rx_missing'].append (part) 
def tx_updates(results, line) : 
        self.assertEqual ('tx', line [0]) 
        subrequests = results ['tx_updates'] 
        if line [1].startswith (('PUT', 'DELETE', 'POST')) : 
            parts = line [1].split ('\r
') 
            (method, path) = parts [0].split () 
            subreq = { 
                'method' : method, 
                'path' : path, 
                'req' : line [1], 
                'headers' : parts [1 :], 
} 
            subrequests.append (subreq) 
else : 
            self.assertTrue (subrequests) 
            body = subrequests [(- 1)].setdefault ('body', '') 
            body += line [1] 
            subrequests [(- 1)] ['body'] = body 
def rx_updates(results, line) : 
        self.assertEqual ('rx', line [0]) 
        results.setdefault ['rx_updates'].append (line [1]) 
def unexpected(results, line) : 
        results.setdefault ('unexpected', []).append (line) 
handshakes = iter ([(('tx', ':MISSING_CHECK: START'), tx_missing), (('tx', ':MISSING_CHECK: END'), unexpected), (('rx', ':MISSING_CHECK: START'), rx_missing), (('rx', ':MISSING_CHECK: END'), unexpected), (('tx', ':UPDATES: START'), rx_updates), (('tx', ':UPDATES: END'), unexpected), (('rx', ':UPDATES: START'),...

    
    

    Fix the buggy line: handshakes = iter ([(('tx', ':MISSING_CHECK: START'), tx_missing), (('tx', ':MISSING_CHECK: END'), unexpected), (('rx', ':MISSING_CHECK: START'), rx_missing), (('rx', ':MISSING_CHECK: END'), unexpected), (('tx', ':UPDATES: START'), rx_updates), (('tx', ':UPDATES: END'), unexpected), (('rx', ':UPDATES: START'), rx_updates), (('rx', ':UPDATES: END'), unexpected)])
assistant
#Here is Python program to fix the buggy line: handshakes = iter ([(('tx', ':MISSING_CHECK: START'), tx_missing), (('tx', ':MISSING_CHECK: END'), unexpected), (('rx', ':MISSING_CHECK: START'), rx_missing), (('rx', ':MISSING_CHECK: END'), unexpected), (('tx', ':UPDATES: START'), rx_updates), (('tx', ':UPDATES: END'), unexpected), (('rx', ':UPDATES: START'), rx_updates), (('rx', ':UPDATES: END'), unexpected)])
.

handshakes = iter ([(('tx', ':MISSING_CHECK: START'), tx_missing), (('tx', ':MISSING_CHECK: END'), unexpected), (('rx', ':MISSING_CHECK: START'), rx_missing), (('rx', ':MISSING_CHECK: END'), unexpected), (('tx', ':UPDATES: START'), def tx_updates(), (('tx', ':UPDATES: END'), unexpected), (('rx', ':UPDATES: START'), rx_updates), (('rx', ':UPDATES: END'), unexpected)])