How to use the pyzotero.pyzotero.zotero function in pyzotero

def testParseItemVersionsResponse(self):
        """ Check that parsing version dict returned by format = versions works """
        zot = z.Zotero("myuserid", "user", "myuserkey")
        HTTPretty.register_uri(
            HTTPretty.GET,
            "https://api.zotero.org/users/myuserid/items?format=versions",
            content_type="application/json",
            body=self.item_versions,
        )
        iversions = zot.item_versions()
        self.assertEqual(iversions["RRK27C5F"], 4000)
        self.assertEqual(iversions["EAWCSKSF"], 4087)
        self.assertEqual(len(iversions), 2)