This has not been the case since 2012. The last release of Python 3 for which this was the case reached end of life in February 2016. Please stop misinforming people.
While u"" is accepted in current Python 3, for some reason they ignored the raw unicode string ur"" which still is a syntax error in Python 3. So, unicode_literals is definitely preferable.
This has not been the case since 2012. The last release of Python 3 for which this was the case reached end of life in February 2016. Please stop misinforming people.