human
Solve the following python programming problem given the following code:
def __call__(self, environ, start_response) : 
    request_path = environ.get ('PATH_INFO', '') 
    if (not self.log_all_requests) : 
        path_parts = request_path.strip ('/').split ('/', 2) 
        if ((len (path_parts) != 3) or (path_parts [0] != 'play')) : 
            return self.app (environ, start_response) 
if (self.log_request_headers or self.log_response_headers) : 
        log_headers = ((not self.log_pattern) or (re.match (self.log_pattern_re, request_path) is not None)) 
else : 
        log_headers = False 
if log_headers : 
        if self.log_request_headers : 
            LOG.info ('Request Headers:') 
            for (k, v) in environ.iteritems () : 
                if k.startswith ('HTTP_') : 
                    LOG.info ('\t%s: %s', k, start_response) 
start_response_args = { 
        
} 
    def logging_start_response(status, headers, exc_info = None) : 
        start_response_args ['status'] = status 
        start_response_args ['headers'] = headers 
        return start_response (status, headers, exc_info) 
response = self.app (environ, logging_start_response) 
    response_headers = dict (start_response_args ['headers']) 
    if self.log_response_name : 
        now = datetime.now ().strftime ('%d/%b/%Y %H:%M:%S') 
        status = start_response_args.get ('status', '200') 
        message = ('"%s %s" %s %s' % (environ.get ('REQUEST_METHOD'), request_path, self.remove_letters_re.sub ('', status), response_headers.get ('Content-Length', 0))) 
        LOG.info ('[%s] %s', now, message) 
if log_headers : 
        if self.log_response_headers : 
            LOG.info ('Response Headers:') 
            for (k, v) in response_headers.iteritems () : 
                LOG.info ('\t%s: %s', k, v) 
return response 

    
    

    Fix the buggy line: LOG.info ('\t%s: %s', k, start_response)
assistant
#Here is Python program to fix the buggy line: LOG.

LOG.info ('\t%s: %s', k, v)