How can I port this code to Python 3 so that it would run in both, Python 2 and Python3?
raise BarException, BarException(e), sys.exc_info()[2]
(copied from http://blog.ionelmc.ro/2014/08/03/the-most-underrated-feature-in-python-3/)
Bonus question
Does it make sense to do something like
IS_PYTHON2 = sys.version_info < (3, 0)
if IS_PYTHON2:
raise BarException, BarException(e), sys.exc_info()[2]
# replace with the code that would run in Python 2 and Python 3 respectively
else:
raise BarException("Bar is closed on Christmas")
You'll have to resort to using exec() because you cannot use the 3-argument syntax in Python 3; it'll raise a syntax error.
As always the six library already has you covered, ported to not depend on other six definitions their version looks like this:
import sys
if sys.version_info[0] == 3:
def reraise(tp, value, tb=None):
if value is None:
value = tp()
if value.__traceback__ is not tb:
raise value.with_traceback(tb)
raise value
else:
exec("def reraise(tp, value, tb=None):\n raise tp, value, tb\n")
Now you can use:
reraise(BarException, BarException(e), sys.exc_info()[2])
without further testing for a Python version.
Collected from the Internet
Please contact [email protected] to delete if infringement.
Comments