Merge pull request #113 from jhgoebbert/putil-fix

catch psutil exceptions

Author: jtpio

jupyter_resource_usage/api.py

@@ -27,7 +27,12 @@ async def get(self):
         all_processes = [cur_process] + cur_process.children(recursive=True)
 
         # Get memory information
-        rss = sum([p.memory_info().rss for p in all_processes])
+        rss = 0
+        for p in all_processes:
+            try:
+                rss += p.memory_info().rss
+            except (psutil.NoSuchProcess, psutil.AccessDenied) as e:
+                pass
 
         if callable(config.mem_limit):
             mem_limit = config.mem_limit(rss=rss)