Fix storing lastResult correctly

Improvements

Author: ghislainfourny

src/jsoniq/sequence.py

@@ -42,24 +42,28 @@ def first(self):
         return tuple(self.getFirstItemsAsList(self._rumblesession.getRumbleConf().getResultSizeCap()))
 
     def json(self):
-        return tuple([json.loads(l.serializeAsJSON()) for l in self._jsequence.getAsList()])
+        self._rumblesession.lastResult = tuple([json.loads(l.serializeAsJSON()) for l in self._jsequence.getAsList()])
+        return self._rumblesession.lastResult
 
     def rdd(self):
         rdd = self._jsequence.getAsPickledStringRDD()
         rdd = RDD(rdd, self._sparkcontext)
-        return rdd.map(lambda l: json.loads(l))
+        self._rumblesession.lastResult = rdd.map(lambda l: json.loads(l))
+        return self._rumblesession.lastResult
 
     def df(self):
         if (not "DataFrame" in self._jsequence.availableOutputs()):
             sys.stderr.write(self.schema_str)
             return None
-        return DataFrame(self._jsequence.getAsDataFrame(), self._sparksession)
+        self._rumblesession.lastResult = DataFrame(self._jsequence.getAsDataFrame(), self._sparksession)
+        return self._rumblesession.lastResult
 
     def pdf(self):
         if (not "DataFrame" in self._jsequence.availableOutputs()):
             sys.stderr.write(self.schema_str)
             return None
-        return self.df().toPandas()
+        self._rumblesession.lastResult = self.df().toPandas()
+        return self._rumblesession.lastResult
 
     def count(self):
         return self._jsequence.count()

src/jsoniq/session.py

@@ -200,8 +200,7 @@ def bindDataFrameAsVariable(self, name: str, df):
 
     def jsoniq(self, str):
         sequence = self._jrumblesession.runQuery(str);
-        self.lastResult = SequenceOfItems(sequence, self);
-        return self.lastResult;
+        return SequenceOfItems(sequence, self);
 
     def __getattr__(self, item):
         return getattr(self._sparksession, item)