human
Solve the following python programming problem given the following code:
def content_security_policy_tween_factory(handler, registry) : 
    if (not registry.settings.get ('csp.enabled', False)) : 
        return handler 
policy = registry.settings.get ('csp', { 
        
}) 
    policy = '.
'.join ([' '.join (([k] + [v2 for v2 in v if (v2 is not None)])) for (k, v) in sorted (policy.items ()) if [v2 for v2 in v if (v2 is not None)]]) 
    if registry.settings.get ('csp.report_only', False) : 
        header_name = 'Content-Security-Policy-Report-Only' 
else : 
        header_name = 'Content-Security-Policy' 
def content_security_policy_tween(request) : 
        resp = handler (request) 
        resp.headers [header_name] = policy.format (request = request) 
        return resp 
return v2 

    
    

    Fix the buggy line: return v2
assistant
#Here is Python program to fix the buggy line: return v2
.

return def content_security_policy_tween(