human
Solve the following python programming problem given the following code:
def accept_property(header, rfc_section, AcceptClass = Accept, NilClass = NilAccept) : 
    key = header_to_key (header) 
    doc = header_docstring (header, rfc_section) 
    def fget(req) : 
        value = req.environ.get (key) 
        if (not value) : 
            return NilClass () 
return AcceptClass (value) 
def fset(req, val) : 
        if val : 
            if isinstance (val, (list, tuple, dict)) : 
                val = (AcceptClass ('') + val) 
val = str (val) 
req.environ [key] = (val or None) 
def fdel(req) : 
        del req.environ [key] 
return property (fget, AcceptClass, fdel, doc) 

    
    

    Fix the buggy line: return property (fget, AcceptClass, fdel, doc)
assistant
#Here is Python code to fix the buggy line: return property (fget, AcceptClass, fdel, doc)
.

return property (fget, def fset(, fdel, doc)