upstream/ipython Commit - r4940:7fbfb3c7

1

{

2

"worksheets": [

3

{

4

"cells": [

5

{

6

"source": "# Simple interactive bacgkround jobs with IPython\n\nWe start by loading the `backgroundjobs` library and defining a few trivial functions to illustrate things with.",

7

"cell_type": "markdown"

8

},

9

{

10

"cell_type": "code",

11

"language": "python",

12

"outputs": [],

13

"collapsed": false,

14

"prompt_number": 15,

15

"input": "from IPython.lib import backgroundjobs as bg\n\nimport sys\nimport time\n\ndef sleepfunc(interval=2, *a, **kw):\n args = dict(interval=interval,\n args=a,\n kwargs=kw)\n time.sleep(interval)\n return args\n\ndef diefunc(interval=2, *a, **kw):\n time.sleep(interval)\n raise Exception(\"Dead job with interval %s\" % interval)\n\ndef printfunc(interval=1, reps=5):\n for n in range(reps):\n time.sleep(interval)\n print 'In the background...', n\n sys.stdout.flush()\n print 'All done!'\n sys.stdout.flush()"

16

},

17

{

18

"source": "Now, we can create a job manager (called simply `jobs`) and use it to submit new jobs.\n \nRun the cell below and wait a few seconds for the whole thing to finish, until you see the \"All done!\" printout.",

19

"cell_type": "markdown"

20

},

21

{

22

"cell_type": "code",

23

"language": "python",

24

"outputs": [

25

{

26

"output_type": "stream",

27

"stream": "stdout",

28

"text": "Starting job # 0 in a separate thread.\nStarting job # 2 in a separate thread.\nStarting job # 3 in a separate thread.\nStarting job # 4 in a separate thread.\nStarting job # 5 in a separate thread.\n"

29

},

30

{

31

"output_type": "stream",

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"stream": "stdout",

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"text": "In the background... 0\n"

34

},

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{

36

"output_type": "stream",

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"stream": "stdout",

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"text": "In the background... 1\n"

39

},

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{

41

"output_type": "stream",

42

"stream": "stdout",

43

"text": "In the background... 2\n"

44

},

45

{

46

"output_type": "stream",

47

"stream": "stdout",

48

"text": "All done!\n"

49

}

50

],

51

"collapsed": false,

52

"prompt_number": 28,

53

"input": "jobs = bg.BackgroundJobManager()\n\n# Start a few jobs, the first one will have ID # 0\njobs.new(sleepfunc, 4)\njobs.new(sleepfunc, kw={'reps':2})\njobs.new('printfunc(1,3)')\n\n# This makes a couple of jobs which will die. Let's keep a reference to\n# them for easier traceback reporting later\ndiejob1 = jobs.new(diefunc, 1)\ndiejob2 = jobs.new(diefunc, 2)"

54

},

55

{

56

"source": "You can check the status of your jobs at any time:",

57

"cell_type": "markdown"

58

},

59

{

60

"cell_type": "code",

61

"language": "python",

62

"outputs": [

63

{

64

"output_type": "stream",

65

"stream": "stdout",

66

"text": "Completed jobs:\n0 : <function sleepfunc at 0x30c8500>\n2 : <function sleepfunc at 0x30c8500>\n3 : printfunc(1,3)\n\nDead jobs:\n4 : <function diefunc at 0x30df758>\n5 : <function diefunc at 0x30df758>\n\n"

67

}

68

],

69

"collapsed": false,

70

"prompt_number": 29,

71

"input": "jobs.status()"

72

},

73

{

74

"source": "For any completed job, you can get its result easily:",

75

"cell_type": "markdown"

76

},

77

{

78

"cell_type": "code",

79

"language": "python",

80

"outputs": [

81

{

82

"output_type": "pyout",

83

"prompt_number": 31,

84

"text": "{'args': (), 'interval': 4, 'kwargs': {}}"

85

}

86

],

87

"collapsed": false,

88

"prompt_number": 31,

89

"input": "jobs[0].result"

90

},

91

{

92

"source": "You can get the traceback of any dead job. Run the line\nbelow again interactively until it prints a traceback (check the status\nof the job):\n",

93

"cell_type": "markdown"

94

},

95

{

96

"cell_type": "code",

97

"language": "python",

98

"outputs": [

99

{

100

"output_type": "stream",

101

"stream": "stdout",

102

"text": "Status of diejob1: Dead (Exception), call jobs.traceback() for details\n---------------------------------------------------------------------------\nException Traceback (most recent call last)\n/home/fperez/usr/lib/python2.6/site-packages/IPython/lib/backgroundjobs.py in call(self)\n 462 \n 463 def call(self):\n--> 464 return self.func(*self.args, **self.kwargs)\n\n/home/fperez/ipython/ipython/docs/examples/lib/<ipython-input-15-54795a097787> in diefunc(interval, *a, **kw)\n 14 def diefunc(interval=2, *a, **kw):\n 15 time.sleep(interval)\n---> 16 raise Exception("Dead job with interval %s" % interval)\n 17 \n 18 def printfunc(interval=1, reps=5):\n\nException: Dead job with interval 1\n"

103

}

104

],

105

"collapsed": false,

106

"prompt_number": 34,

107

"input": "print \"Status of diejob1:\", diejob1.status\ndiejob1.traceback() # jobs.traceback(4) would also work here, with the job number"

108

},

109

{

110

"source": "This will print all tracebacks for all dead jobs:",

111

"cell_type": "markdown"

112

},

113

{

114

"cell_type": "code",

115

"language": "python",

116

"outputs": [

117

{

118

"output_type": "stream",

119

"stream": "stdout",

120

"text": "Traceback for: <BackgroundJob #4: <function diefunc at 0x30df758>>\n---------------------------------------------------------------------------\nException Traceback (most recent call last)\n/home/fperez/usr/lib/python2.6/site-packages/IPython/lib/backgroundjobs.py in call(self)\n 462 \n 463 def call(self):\n--> 464 return self.func(*self.args, **self.kwargs)\n\n/home/fperez/ipython/ipython/docs/examples/lib/<ipython-input-15-54795a097787> in diefunc(interval, *a, **kw)\n 14 def diefunc(interval=2, *a, **kw):\n 15 time.sleep(interval)\n---> 16 raise Exception("Dead job with interval %s" % interval)\n 17 \n 18 def printfunc(interval=1, reps=5):\n\nException: Dead job with interval 1\n\nTraceback for: <BackgroundJob #5: <function diefunc at 0x30df758>>\n---------------------------------------------------------------------------\nException Traceback (most recent call last)\n/home/fperez/usr/lib/python2.6/site-packages/IPython/lib/backgroundjobs.py in call(self)\n 462 \n 463 def call(self):\n--> 464 return self.func(*self.args, **self.kwargs)\n\n/home/fperez/ipython/ipython/docs/examples/lib/<ipython-input-15-54795a097787> in diefunc(interval, *a, **kw)\n 14 def diefunc(interval=2, *a, **kw):\n 15 time.sleep(interval)\n---> 16 raise Exception("Dead job with interval %s" % interval)\n 17 \n 18 def printfunc(interval=1, reps=5):\n\nException: Dead job with interval 2\n\n"

121

}

122

],

123

"collapsed": false,

124

"prompt_number": 33,

125

"input": "jobs.traceback()"

126

},

127

{

128

"source": "The job manager can be flushed of all completed jobs at any time:",

129

"cell_type": "markdown"

130

},

131

{

132

"cell_type": "code",

133

"language": "python",

134

"outputs": [

135

{

136

"output_type": "stream",

137

"stream": "stdout",

138

"text": "No jobs to flush.\n"

139

}

140

],

141

"collapsed": false,

142

"prompt_number": 25,

143

"input": "jobs.flush()"

144

},

145

{

146

"source": "After that, the status is simply empty:",

147

"cell_type": "markdown"

148

},

149

{

150

"cell_type": "code",

151

"language": "python",

152

"outputs": [],

153

"collapsed": true,

154

"prompt_number": 27,

155

"input": "jobs.status()"

156

},

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{

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"input": "",

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"cell_type": "code",

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"collapsed": true,

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"language": "python",

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"outputs": []

163

}

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]

165

}

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],

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"metadata": {

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"name": "BackgroundJobs"

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},

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"nbformat": 2

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} No newline at end of file

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@@ -0,0 +1,171 b''
	1	{
	2	"worksheets": [
	3	{
	4	"cells": [
	5	{
	6	"source": "# Simple interactive bacgkround jobs with IPython\n\nWe start by loading the `backgroundjobs` library and defining a few trivial functions to illustrate things with.",
	7	"cell_type": "markdown"
	8	},
	9	{
	10	"cell_type": "code",
	11	"language": "python",
	12	"outputs": [],
	13	"collapsed": false,
	14	"prompt_number": 15,
	15	"input": "from IPython.lib import backgroundjobs as bg\n\nimport sys\nimport time\n\ndef sleepfunc(interval=2, a, kw):\n args = dict(interval=interval,\n args=a,\n kwargs=kw)\n time.sleep(interval)\n return args\n\ndef diefunc(interval=2, a, **kw):\n time.sleep(interval)\n raise Exception(\"Dead job with interval %s\" % interval)\n\ndef printfunc(interval=1, reps=5):\n for n in range(reps):\n time.sleep(interval)\n print 'In the background...', n\n sys.stdout.flush()\n print 'All done!'\n sys.stdout.flush()"
	16	},
	17	{
	18	"source": "Now, we can create a job manager (called simply `jobs`) and use it to submit new jobs.\n<br>\nRun the cell below and wait a few seconds for the whole thing to finish, until you see the \"All done!\" printout.",
	19	"cell_type": "markdown"
	20	},
	21	{
	22	"cell_type": "code",
	23	"language": "python",
	24	"outputs": [
	25	{
	26	"output_type": "stream",
	27	"stream": "stdout",
	28	"text": "Starting job # 0 in a separate thread.\nStarting job # 2 in a separate thread.\nStarting job # 3 in a separate thread.\nStarting job # 4 in a separate thread.\nStarting job # 5 in a separate thread.\n"
	29	},
	30	{
	31	"output_type": "stream",
	32	"stream": "stdout",
	33	"text": "In the background... 0\n"
	34	},
	35	{
	36	"output_type": "stream",
	37	"stream": "stdout",
	38	"text": "In the background... 1\n"
	39	},
	40	{
	41	"output_type": "stream",
	42	"stream": "stdout",
	43	"text": "In the background... 2\n"
	44	},
	45	{
	46	"output_type": "stream",
	47	"stream": "stdout",
	48	"text": "All done!\n"
	49	}
	50	],
	51	"collapsed": false,
	52	"prompt_number": 28,
	53	"input": "jobs = bg.BackgroundJobManager()\n\n# Start a few jobs, the first one will have ID # 0\njobs.new(sleepfunc, 4)\njobs.new(sleepfunc, kw={'reps':2})\njobs.new('printfunc(1,3)')\n\n# This makes a couple of jobs which will die. Let's keep a reference to\n# them for easier traceback reporting later\ndiejob1 = jobs.new(diefunc, 1)\ndiejob2 = jobs.new(diefunc, 2)"
	54	},
	55	{
	56	"source": "You can check the status of your jobs at any time:",
	57	"cell_type": "markdown"
	58	},
	59	{
	60	"cell_type": "code",
	61	"language": "python",
	62	"outputs": [
	63	{
	64	"output_type": "stream",
	65	"stream": "stdout",
	66	"text": "Completed jobs:\n0 : <function sleepfunc at 0x30c8500>\n2 : <function sleepfunc at 0x30c8500>\n3 : printfunc(1,3)\n\nDead jobs:\n4 : <function diefunc at 0x30df758>\n5 : <function diefunc at 0x30df758>\n\n"
	67	}
	68	],
	69	"collapsed": false,
	70	"prompt_number": 29,
	71	"input": "jobs.status()"
	72	},
	73	{
	74	"source": "For any completed job, you can get its result easily:",
	75	"cell_type": "markdown"
	76	},
	77	{
	78	"cell_type": "code",
	79	"language": "python",
	80	"outputs": [
	81	{
	82	"output_type": "pyout",
	83	"prompt_number": 31,
	84	"text": "{'args': (), 'interval': 4, 'kwargs': {}}"
	85	}
	86	],
	87	"collapsed": false,
	88	"prompt_number": 31,
	89	"input": "jobs[0].result"
	90	},
	91	{
	92	"source": "You can get the traceback of any dead job. Run the line\nbelow again interactively until it prints a traceback (check the status\nof the job):\n",
	93	"cell_type": "markdown"
	94	},
	95	{
	96	"cell_type": "code",
	97	"language": "python",
	98	"outputs": [
	99	{
	100	"output_type": "stream",
	101	"stream": "stdout",
	102	"text": "Status of diejob1: Dead (Exception), call jobs.traceback() for details\n<span class=\"ansired\">---------------------------------------------------------------------------</span>\n<span class=\"ansired\">Exception</span> Traceback (most recent call last)\n<span class=\"ansigreen\">/home/fperez/usr/lib/python2.6/site-packages/IPython/lib/backgroundjobs.py</span> in <span class=\"ansicyan\">call</span><span class=\"ansiblue\">(self)</span>\n<span class=\"ansigreen\"> 462</span> <span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\"> 463</span> <span class=\"ansigreen\">def</span> call<span class=\"ansiyellow\">(</span>self<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\">--> 464</span><span class=\"ansiyellow\"> </span><span class=\"ansigreen\">return</span> self<span class=\"ansiyellow\">.</span>func<span class=\"ansiyellow\">(</span><span class=\"ansiyellow\"></span>self<span class=\"ansiyellow\">.</span>args<span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\"></span>self<span class=\"ansiyellow\">.</span>kwargs<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n\n<span class=\"ansigreen\">/home/fperez/ipython/ipython/docs/examples/lib/<ipython-input-15-54795a097787></span> in <span class=\"ansicyan\">diefunc</span><span class=\"ansiblue\">(interval, a, *kw)</span>\n<span class=\"ansigreen\"> 14</span> <span class=\"ansigreen\">def</span> diefunc<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">2</span><span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\"></span>a<span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\">**</span>kw<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\"> 15</span> time<span class=\"ansiyellow\">.</span>sleep<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\">---> 16</span><span class=\"ansiyellow\"> </span><span class=\"ansigreen\">raise</span> Exception<span class=\"ansiyellow\">(</span><span class=\"ansiblue\">"Dead job with interval %s"</span> <span class=\"ansiyellow\">%</span> interval<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\"> 17</span> <span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\"> 18</span> <span class=\"ansigreen\">def</span> printfunc<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">1</span><span class=\"ansiyellow\">,</span> reps<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">5</span><span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n\n<span class=\"ansired\">Exception</span>: Dead job with interval 1\n"
	103	}
	104	],
	105	"collapsed": false,
	106	"prompt_number": 34,
	107	"input": "print \"Status of diejob1:\", diejob1.status\ndiejob1.traceback() # jobs.traceback(4) would also work here, with the job number"
	108	},
	109	{
	110	"source": "This will print all tracebacks for all dead jobs:",
	111	"cell_type": "markdown"
	112	},
	113	{
	114	"cell_type": "code",
	115	"language": "python",
	116	"outputs": [
	117	{
	118	"output_type": "stream",
	119	"stream": "stdout",
	120	"text": "Traceback for: <BackgroundJob #4: <function diefunc at 0x30df758>>\n<span class=\"ansired\">---------------------------------------------------------------------------</span>\n<span class=\"ansired\">Exception</span> Traceback (most recent call last)\n<span class=\"ansigreen\">/home/fperez/usr/lib/python2.6/site-packages/IPython/lib/backgroundjobs.py</span> in <span class=\"ansicyan\">call</span><span class=\"ansiblue\">(self)</span>\n<span class=\"ansigreen\"> 462</span> <span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\"> 463</span> <span class=\"ansigreen\">def</span> call<span class=\"ansiyellow\">(</span>self<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\">--> 464</span><span class=\"ansiyellow\"> </span><span class=\"ansigreen\">return</span> self<span class=\"ansiyellow\">.</span>func<span class=\"ansiyellow\">(</span><span class=\"ansiyellow\"></span>self<span class=\"ansiyellow\">.</span>args<span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\"></span>self<span class=\"ansiyellow\">.</span>kwargs<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n\n<span class=\"ansigreen\">/home/fperez/ipython/ipython/docs/examples/lib/<ipython-input-15-54795a097787></span> in <span class=\"ansicyan\">diefunc</span><span class=\"ansiblue\">(interval, a, *kw)</span>\n<span class=\"ansigreen\"> 14</span> <span class=\"ansigreen\">def</span> diefunc<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">2</span><span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\"></span>a<span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\">*</span>kw<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\"> 15</span> time<span class=\"ansiyellow\">.</span>sleep<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\">---> 16</span><span class=\"ansiyellow\"> </span><span class=\"ansigreen\">raise</span> Exception<span class=\"ansiyellow\">(</span><span class=\"ansiblue\">"Dead job with interval %s"</span> <span class=\"ansiyellow\">%</span> interval<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\"> 17</span> <span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\"> 18</span> <span class=\"ansigreen\">def</span> printfunc<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">1</span><span class=\"ansiyellow\">,</span> reps<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">5</span><span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n\n<span class=\"ansired\">Exception</span>: Dead job with interval 1\n\nTraceback for: <BackgroundJob #5: <function diefunc at 0x30df758>>\n<span class=\"ansired\">---------------------------------------------------------------------------</span>\n<span class=\"ansired\">Exception</span> Traceback (most recent call last)\n<span class=\"ansigreen\">/home/fperez/usr/lib/python2.6/site-packages/IPython/lib/backgroundjobs.py</span> in <span class=\"ansicyan\">call</span><span class=\"ansiblue\">(self)</span>\n<span class=\"ansigreen\"> 462</span> <span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\"> 463</span> <span class=\"ansigreen\">def</span> call<span class=\"ansiyellow\">(</span>self<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\">--> 464</span><span class=\"ansiyellow\"> </span><span class=\"ansigreen\">return</span> self<span class=\"ansiyellow\">.</span>func<span class=\"ansiyellow\">(</span><span class=\"ansiyellow\"></span>self<span class=\"ansiyellow\">.</span>args<span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\">*</span>self<span class=\"ansiyellow\">.</span>kwargs<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n\n<span class=\"ansigreen\">/home/fperez/ipython/ipython/docs/examples/lib/<ipython-input-15-54795a097787></span> in <span class=\"ansicyan\">diefunc</span><span class=\"ansiblue\">(interval, a, *kw)</span>\n<span class=\"ansigreen\"> 14</span> <span class=\"ansigreen\">def</span> diefunc<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">2</span><span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\"></span>a<span class=\"ansiyellow\">,</span> <span class=\"ansiyellow\">**</span>kw<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\"> 15</span> time<span class=\"ansiyellow\">.</span>sleep<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\">---> 16</span><span class=\"ansiyellow\"> </span><span class=\"ansigreen\">raise</span> Exception<span class=\"ansiyellow\">(</span><span class=\"ansiblue\">"Dead job with interval %s"</span> <span class=\"ansiyellow\">%</span> interval<span class=\"ansiyellow\">)</span><span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\"> 17</span> <span class=\"ansiyellow\"></span>\n<span class=\"ansigreen\"> 18</span> <span class=\"ansigreen\">def</span> printfunc<span class=\"ansiyellow\">(</span>interval<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">1</span><span class=\"ansiyellow\">,</span> reps<span class=\"ansiyellow\">=</span><span class=\"ansicyan\">5</span><span class=\"ansiyellow\">)</span><span class=\"ansiyellow\">:</span><span class=\"ansiyellow\"></span>\n\n<span class=\"ansired\">Exception</span>: Dead job with interval 2\n\n"
	121	}
	122	],
	123	"collapsed": false,
	124	"prompt_number": 33,
	125	"input": "jobs.traceback()"
	126	},
	127	{
	128	"source": "The job manager can be flushed of all completed jobs at any time:",
	129	"cell_type": "markdown"
	130	},
	131	{
	132	"cell_type": "code",
	133	"language": "python",
	134	"outputs": [
	135	{
	136	"output_type": "stream",
	137	"stream": "stdout",
	138	"text": "No jobs to flush.\n"
	139	}
	140	],
	141	"collapsed": false,
	142	"prompt_number": 25,
	143	"input": "jobs.flush()"
	144	},
	145	{
	146	"source": "After that, the status is simply empty:",
	147	"cell_type": "markdown"
	148	},
	149	{
	150	"cell_type": "code",
	151	"language": "python",
	152	"outputs": [],
	153	"collapsed": true,
	154	"prompt_number": 27,
	155	"input": "jobs.status()"
	156	},
	157	{
	158	"input": "",
	159	"cell_type": "code",
	160	"collapsed": true,
	161	"language": "python",
	162	"outputs": []
	163	}
	164	]
	165	}
	166	],
	167	"metadata": {
	168	"name": "BackgroundJobs"
	169	},
	170	"nbformat": 2
	171	} No newline at end of file