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bind_kernel on a bound kernel is a no-op
MinRK -
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@@ -1,62 +1,74 b''
1 1 """The IPython ZMQ-based parallel computing interface.
2 2
3 3 Authors:
4 4
5 5 * MinRK
6 6 """
7 7 #-----------------------------------------------------------------------------
8 8 # Copyright (C) 2011 The IPython Development Team
9 9 #
10 10 # Distributed under the terms of the BSD License. The full license is in
11 11 # the file COPYING, distributed as part of this software.
12 12 #-----------------------------------------------------------------------------
13 13
14 14 #-----------------------------------------------------------------------------
15 15 # Imports
16 16 #-----------------------------------------------------------------------------
17 17
18 18 import os
19 19 import warnings
20 20
21 21 import zmq
22 22
23 from IPython.config.configurable import MultipleInstanceError
23 24 from IPython.zmq import check_for_zmq
24 25
25 26 if os.name == 'nt':
26 27 min_pyzmq = '2.1.7'
27 28 else:
28 29 min_pyzmq = '2.1.4'
29 30
30 31 check_for_zmq(min_pyzmq, 'IPython.parallel')
31 32
32 33 from IPython.utils.pickleutil import Reference
33 34
34 35 from .client.asyncresult import *
35 36 from .client.client import Client
36 37 from .client.remotefunction import *
37 38 from .client.view import *
38 39 from .util import interactive
39 40 from .controller.dependency import *
40 41
41 42 #-----------------------------------------------------------------------------
42 43 # Functions
43 44 #-----------------------------------------------------------------------------
44 45
45 46
46 47 def bind_kernel(**kwargs):
47 48 """Bind an Engine's Kernel to be used as a full IPython kernel.
48 49
49 50 This allows a running Engine to be used simultaneously as a full IPython kernel
50 51 with the QtConsole or other frontends.
51 52
52 53 This function returns immediately.
53 54 """
55 from IPython.zmq.ipkernel import IPKernelApp
54 56 from IPython.parallel.apps.ipengineapp import IPEngineApp
57
58 # first check for IPKernelApp, in which case this should be a no-op
59 # because there is already a bound kernel
60 if IPKernelApp.initialized() and isinstance(IPKernelApp._instance, IPKernelApp):
61 return
62
55 63 if IPEngineApp.initialized():
64 try:
56 65 app = IPEngineApp.instance()
66 except MultipleInstanceError:
67 pass
57 68 else:
58 raise RuntimeError("Must be called from an IPEngineApp instance")
59
60 69 return app.bind_kernel(**kwargs)
61 70
71 raise RuntimeError("bind_kernel be called from an IPEngineApp instance")
72
73
62 74
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