From ce175464a8a6345e28d8dbad2e19ba6a45a3afaa 2016-07-01 21:22:22
From: Thomas Kluyver <takowl@gmail.com>
Date: 2016-07-01 21:22:22
Subject: [PATCH] Merge pull request #9687 from Carreau/memory-history

Precise you can use `:memory:` for the history
---

diff --git a/IPython/core/history.py b/IPython/core/history.py
index 5147ad9..682032b 100644
--- a/IPython/core/history.py
+++ b/IPython/core/history.py
@@ -161,6 +161,9 @@ class HistoryAccessor(HistoryAccessorBase):
         local disk, e.g::
         
             ipython --HistoryManager.hist_file=/tmp/ipython_hist.sqlite
+
+        you can also use the specific value `:memory:` (including the colon
+        at both end but not the back ticks), to avoid creating an history file.
         
         """).tag(config=True)