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annotate piecrust/events.py @ 1168:10520472cc73

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routing: Fix breakages with routing on some versions of Python. Finally figured what happened with change 6baa94da8b16 (this is a Mercurial hash by the way if you're looking at the Git mirror). Between Python 3.6 and 3.7 there was a change where the percent sign ('%') went from being escaped by `re.escape` to _not_ being escaped. So now we need to use different regex patterns dependin on the Python version, yay.
author Ludovic Chabant <ludovic@chabant.com>
date Fri, 04 Oct 2019 11:13:33 -0700
parents f070a4fc033c
children
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f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
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2 class Event(object):
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f070a4fc033c core: Continue PieCrust3 refactor, simplify pages.
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3 """ A simple implementation of a subscribable event.
f070a4fc033c core: Continue PieCrust3 refactor, simplify pages.
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4 """
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5 def __init__(self):
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6 self._handlers = []
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8 def __iadd__(self, handler):
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9 self._handlers.append(handler)
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10 return self
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12 def __isub__(self, handler):
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13 self._handlers.remove(handler)
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14 return self
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16 def fire(self, *args, **kwargs):
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17 # Make a copy of the handlers list in case some handler removes
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18 # itself while executing.
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19 handlers = list(self._handlers)
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20 for handler in handlers:
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21 handler(*args, **kwargs)
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