twshell: do not install gtk2 reactor automatically

IPython/twshell.py

@@ -1,13 +1,7 b''
 import sys
 
-from twisted.internet import gtk2reactor
-gtk2reactor.install()
-
 from twisted.internet import reactor, threads
 
-""" change here to choose the plot shell with the MT option
-    which should cost extra """
-
 from IPython.ipmaker import make_IPython
 from IPython.iplib import InteractiveShell 
 from IPython.ipstruct import Struct
@@ -16,6 +10,11 b' from signal import signal, SIGINT'
 from IPython.genutils import Term,warn,error,flag_calls, ask_yes_no
 import shellglobals
 
+def install_gtk2():
+    """ Install gtk2 reactor, needs to be called bef """
+    from twisted.internet import gtk2reactor
+    gtk2reactor.install()
+
 
 def hijack_reactor():
     """Modifies Twisted's reactor with a dummy so user code does
@@ -126,7 +125,6 b' class TwistedInteractiveShell(InteractiveShell):'
             print "switching to nonthreaded mode (until mainloop wakes up again)"
             self.worker_ident = None
         else:
-            shellglobals.CURRENT_COMPLETE_EV = completed_ev
             completed_ev.wait()
         
         return False