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Make event triggering robust to (un)registration....

Make event triggering robust to (un)registration. Event callbacks can register or unregister new callbacks for the same event while executing, and the previous triggering implementation allowed for event callbacks to be inadvertently skipped. The fix is to make a copy of the list of callbacks before executing any of them. With this change, the resulting semantics are simple: any callbacks registered before triggering are executed, and any new callbacks registered are only visible at the next triggering of the event. Note that this could potentially break existing callers who expected newly-appended callbacks were immediately executed. Fixes . Originally based on a patch by @marksandler2.

Thomas Kluyver - - Load All Authors

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      #!/usr/bin/env python

      """Wrapper to run setup.py using setuptools."""

      # Import setuptools and call the actual setup

      import setuptools

      with open('setup.py', 'rb') as f:

          exec(compile(f.read(), 'setup.py', 'exec'))

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				#!/usr/bin/env python
				"""Wrapper to run setup.py using setuptools."""

				# Import setuptools and call the actual setup
				import setuptools
				with open('setup.py', 'rb') as f:
				exec(compile(f.read(), 'setup.py', 'exec'))