Implemented autosave.

IPython/core/interactiveshell.py

@@ -27,6 +27,8 b' import re'
 import sys
 import tempfile
 import types
+import threading
+import time
 from contextlib import nested
 
 from IPython.config.configurable import Configurable
@@ -129,6 +131,23 b' class SeparateStr(Str):'
 class MultipleInstanceError(Exception):
     pass
 
+class HistorySaveThread(threading.Thread):
+    """Thread to save history periodically"""
+
+    def __init__(self, IPython_object, time_interval, exit_now):
+        threading.Thread.__init__(self)
+        self.IPython_object = IPython_object
+        self.time_interval = time_interval
+        self.exit_now = exit_now
+
+    def run(self):
+        while 1:
+            if self.exit_now==True:
+                break
+            time.sleep(self.time_interval)
+            #printing for debug
+            #print "Saving..."
+            self.IPython_object.save_history()
 
 #-----------------------------------------------------------------------------
 # Main IPython class
@@ -293,6 +312,8 b' class InteractiveShell(Configurable, Magic):'
         self.init_payload()
         self.hooks.late_startup_hook()
         atexit.register(self.atexit_operations)
+        self.history_thread = HistorySaveThread(self, 1, False)
+        self.history_thread.start()
 
     # While we're trying to have each part of the code directly access what it
     # needs without keeping redundant references to objects, we have too much
@@ -2523,7 +2544,6 b' class InteractiveShell(Configurable, Magic):'
             except OSError:
                 pass
 
-        
         self.save_history()
 
         # Clear all user namespaces to release all references cleanly.

IPython/frontend/terminal/interactiveshell.py

@@ -24,6 +24,7 b' import sys'
 from IPython.core.error import TryNext
 from IPython.core.usage import interactive_usage, default_banner
 from IPython.core.interactiveshell import InteractiveShell, InteractiveShellABC
+from IPython.core.interactiveshell import HistorySaveThread
 from IPython.lib.inputhook import enable_gui
 from IPython.lib.pylabtools import pylab_activate
 from IPython.utils.terminal import toggle_set_term_title, set_term_title
@@ -496,9 +497,15 b' class TerminalInteractiveShell(InteractiveShell):'
         """Handle interactive exit.
 
         This method calls the ask_exit callback."""
+        self.shell.history_thread.exit_now=True
+        self.shell.history_thread.join()
         if self.confirm_exit:
             if self.ask_yes_no('Do you really want to exit ([y]/n)?','y'):
                 self.ask_exit()
+            else:
+                self.shell.history_thread = HistorySaveThread(self.shell, 1,
+                        False)
+                self.shell.history_thread.start()
         else:
             self.ask_exit()