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480+ "source" : [
481+ " ### UAT 17 - Timers\n "
482+ " \n "
483+ " Single-shot timers follow a completely different code path in the nbagg backend than regular timers (such as those used in the animation example above.) The next set of tests ensures that both \" regular\" and \" single-shot\" timers work properly.\n "
484+ " \n "
485+ " The following should show a simple clock that updates twice a second:"
486+ ]
487+ },
488+ {
489+ "cell_type" : " code"
490+ "collapsed" : true ,
491+ "input" : [
492+ " import time\n "
493+ " \n "
494+ " fig, ax = plt.subplots()\n "
495+ " text = ax.text(0.5, 0.5, '', ha='center')\n "
496+ " \n "
497+ " def update(text):\n "
498+ " text.set(text=time.ctime())\n "
499+ " text.axes.figure.canvas.draw()\n "
500+ " \n "
501+ " timer = fig.canvas.new_timer(500, [(update, [text], {})])\n "
502+ " timer.start()\n "
503+ " plt.show()"
504+ ],
505+ "language" : " python"
506+ "metadata" : {},
507+ "outputs" : [],
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509+ },
510+ {
511+ "cell_type" : " markdown"
512+ "metadata" : {},
513+ "source" : [
514+ " However, the following should only update once and then stop:"
515+ ]
516+ },
517+ {
518+ "cell_type" : " code"
519+ "collapsed" : true ,
520+ "input" : [
521+ " fig, ax = plt.subplots()\n "
522+ " text = ax.text(0.5, 0.5, '', ha='center') \n "
523+ " timer = fig.canvas.new_timer(500, [(update, [text], {})])\n "
524+ " \n "
525+ " time.single_shot = True\n "
526+ " timer.start()\n "
527+ " \n "
528+ " plt.show()"
529+ ],
530+ "language" : " python"
531+ "metadata" : {},
532+ "outputs" : [],
533+ "prompt_number" : null
534+ },
535+ {
536+ "cell_type" : " markdown"
537+ "metadata" : {},
538+ "source" : [
539+ " And the next two examples should never show any visible text at all:"
540+ ]
541+ },
542+ {
543+ "cell_type" : " code"
544+ "collapsed" : true ,
545+ "input" : [
546+ " fig, ax = plt.subplots()\n "
547+ " text = ax.text(0.5, 0.5, '', ha='center')\n "
548+ " timer = fig.canvas.new_timer(500, [(update, [text], {})])\n "
549+ " \n "
550+ " timer.start()\n "
551+ " timer.stop()\n "
552+ " \n "
553+ " plt.show()"
554+ ],
555+ "language" : " python"
556+ "metadata" : {},
557+ "outputs" : [],
558+ "prompt_number" : null
559+ },
560+ {
561+ "cell_type" : " code"
562+ "collapsed" : true ,
563+ "input" : [
564+ " fig, ax = plt.subplots()\n "
565+ " text = ax.text(0.5, 0.5, '', ha='center')\n "
566+ " timer = fig.canvas.new_timer(500, [(update, [text], {})])\n "
567+ " \n "
568+ " timer.single_shot = True\n "
569+ " timer.start()\n "
570+ " timer.stop()\n "
571+ " \n "
572+ " plt.show()"
573+ ],
574+ "language" : " python"
575+ "metadata" : {},
576+ "outputs" : [],
577+ "prompt_number" : null
442578 }
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444580 "metadata" : {}
445581 }
446582 ]
447- }
583+ }
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