adding unmatch/match methods from video:Movie and video:Show classes to base:PlexPartialObject

minor improvements to matches method thanks to @JonnyWong16
matching can be done for artists, albums, shows, movies
all other media types safely return an empty list []

plexapi/base.py

@@ -429,6 +429,43 @@ class PlexPartialObject(PlexObject):
         """
         return self._server.history(maxresults=maxresults, mindate=mindate, ratingKey=self.ratingKey)
 
+    def unmatch(self):
+        """ Unmatches show object. """
+        key = '/library/metadata/%s/unmatch' % self.ratingKey
+        self._server.query(key, method=self._server._session.put)
+
+    def matches(self, auto=True, agent=None, title=None, year=None, language=None):
+        """ Return list of show metadata matches from library agent. """
+        key = '/library/metadata/%s/matches' % self.ratingKey
+        if not auto:
+            params = {'manual': 1,
+                      'title': title or self.title,
+                      'year': year or self.year if self.section().type != 'artist' else '',
+                      'language': language or self.section().language}
+            if agent:
+                agents = self._server.agents()
+                match_agent = next((ag for ag in agents if ag.shortIdentifier == agent), None)
+                if match_agent:
+                    params['agent'] = match_agent.identifier
+                else:
+                    raise NotFound('Couldnt find "%s" in agents list (%s)' %
+                                   (agent, ','.join(agents.keys())))
+            else:
+                params['agent'] = self.section().agent
+
+            key = key + '?' + urlencode(params)
+        data = self._server.query(key, method=self._server._session.get)
+        return self.findItems(data)
+
+    def fixMatch(self, searchResult):
+        """ Use match result to update show metadata. """
+        key = '/library/metadata/%s/match' % self.ratingKey
+        params = {'guid': searchResult.guid,
+                  'name': searchResult.name}
+
+        data = key + '?' + urlencode(params)
+        self._server.query(data, method=self._server._session.put)
+
     # The photo tag cant be built atm. TODO
     # def arts(self):
     #     part = '%s/arts' % self.key