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GeezerVison is showing github.com — Add option to EventManager to prevent printing (#14076) · ipython/ipython@ee0bc15

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IPython/core
- events.py

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`‎IPython/core/events.py‎`

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+7-2Lines changed: 7 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -26,7 +26,8 @@ class EventManager(object):`
`26`	`26`
`27`	`27`	`This API is experimental in IPython 2.0, and may be revised in future versions.`
`28`	`28`	`"""`
`29`		`- def __init__(self, shell, available_events):`
	`29`	`+`
	`30`	`+ def __init__(self, shell, available_events, print_on_error=True):`
`30`	`31`	"""Initialise the :class:`CallbackManager`.
`31`	`32`
`32`	`33`	`Parameters`
`@@ -35,9 +36,12 @@ def __init__(self, shell, available_events):`
`35`	`36`	The :class:`~IPython.core.interactiveshell.InteractiveShell` instance
`36`	`37`	`available_events`
`37`	`38`	`An iterable of names for callback events.`
	`39`	`+ print_on_error:`
	`40`	`+ A boolean flag to set whether the EventManager will print a warning which a event errors.`
`38`	`41`	`"""`
`39`	`42`	`self.shell = shell`
`40`	`43`	`self.callbacks = {n:[] for n in available_events}`
	`44`	`+ self.print_on_error = print_on_error`
`41`	`45`
`42`	`46`	`def register(self, event, function):`
`43`	`47`	`"""Register a new event callback.`
`@@ -88,7 +92,8 @@ def trigger(self, event, args, *kwargs):`
`88`	`92`	`try:`
`89`	`93`	`func(args, *kwargs)`
`90`	`94`	`except (Exception, KeyboardInterrupt):`
`91`		`- print("Error in callback {} (for {}):".format(func, event))`
	`95`	`+ if self.print_on_error:`
	`96`	`+ print("Error in callback {} (for {}):".format(func, event))`
`92`	`97`	`self.shell.showtraceback()`
`93`	`98`
`94`	`99`	`# event_name -> prototype mapping`

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