def values(self, values):
self._values = values.copy()<EOL>return self<EOL>
Set the values dictionary to write to the table.

N.B. Because the subject_key is included in row dicts returned by this library
     but is also not allowed as a field in a values sumission to Factual's input 
         action, if 'subject_key' is in the submitted values dict, it will be removed
         and passed as the subject_key parameter to this edit, unless a different, 
         non-None subject_key is explicitly specified. 

     This will make this edit an update rather than an insert.