Deal with tempfile on Windows

scienceworld/scienceworld.py

@@ -4,6 +4,7 @@
 import logging
 import tempfile
 from collections import OrderedDict
+from os.path import join as pjoin
 
 from py4j.java_gateway import JavaGateway, GatewayParameters, launch_gateway, CallbackServerParameters
 
@@ -80,7 +81,7 @@ def __init__(self, taskName: str = None, serverPath: str = None, envStepLimit: i
         # By default, set that the gold path was not generated unless the user asked for it
         self.goldPathGenerated = False
 
-        self._obj_tree_tempfile = tempfile.NamedTemporaryFile()
+        self._obj_tree_tempdir = tempfile.TemporaryDirectory()
 
     # Ask the simulator to load an environment from a script
     def load(self, taskName: str, variationIdx: int = 0, simplificationStr: str = "",
@@ -276,14 +277,15 @@ def get_task_description(self) -> str:
 
     # Get the current game's task description
     def getObjectTree(self):
-        msg = self.server.getObjectTree(self._obj_tree_tempfile.name)
+        msg = self.server.getObjectTree(self._obj_tree_tempdir.name)
         if msg:
             # Game is not initialized.
             raise RuntimeError(msg)
 
-        self._obj_tree_tempfile.file.seek(0)
-        payload = self._obj_tree_tempfile.file.read()
-        return json.loads(payload)
+        with open(pjoin(self._obj_tree_tempdir.name, 'objectTree.json')) as f:
+            payload = json.load(f)
+
+        return payload
 
     #
     # History

simulator/src/main/scala/scienceworld/runtime/pythonapi/PythonInterface.scala

@@ -1,6 +1,6 @@
 package scienceworld.runtime.pythonapi
 
-import java.io.PrintWriter
+import java.io.{File, FileOutputStream,PrintWriter}
 
 import main.scala.scienceworld.runtime.SimplifierProcessor
 import scienceworld.environments.EnvironmentMaker
@@ -325,13 +325,13 @@ class PythonInterface() {
     agentInterface.get.getTaskDescription()
   }
 
-  def getObjectTree(path:String = ""):String = {
+  def getObjectTree(folderPath:String = ""):String = {
     if (agentInterface.isEmpty) return ERROR_MESSAGE_UNINITIALIZED
 
     val objTree = agentInterface.get.universe.toJSON()
-    if (path == "") return objTree
+    if (folderPath == "") return objTree
 
-    val pw = new PrintWriter(path)
+    var pw = new PrintWriter(folderPath + "/objectTree.json");
     pw.print(objTree)
     pw.close()
     return ""