Restart bash if we get an EOF error.

Restart bash if there are any errors

Limit catches to pexpect.EOF, print previous output

Catch keyboard interrupts while waiting for bash prompt

Revert try/catch around expect_prompt

bash_kernel.py

@@ -1,6 +1,5 @@
 from IPython.kernel.zmq.kernelbase import Kernel
-from pexpect import replwrap
-import pexpect
+from pexpect import replwrap, EOF
 
 import signal
 from subprocess import check_output
@@ -28,6 +27,9 @@ class BashKernel(Kernel):
     
     def __init__(self, **kwargs):
         Kernel.__init__(self, **kwargs)
+        self._start_bash()
+
+    def _start_bash(self):
         # Signal handlers are inherited by forked processes, and we can't easily
         # reset it from the subprocess. Since kernelapp ignores SIGINT except in
         # message handlers, we need to temporarily reset the SIGINT handler here
@@ -52,9 +54,9 @@ class BashKernel(Kernel):
             interrupted = True
             self.bashwrapper._expect_prompt()
             output = self.bashwrapper.child.before
-        except pexpect.EOF:
-            # TODO: how do we shut down gracefully here?
-            output = ''
+        except EOF:
+            output = self.bashwrapper.child.before + 'Restarting Bash'
+            self._start_bash()
 
         if not silent:
             stream_content = {'name': 'stdout', 'data': output}