[Python-Dev] Raw string syntax inconsistency (original) (raw)
Christian Heimes lists at cheimes.de
Sun Jun 17 13:45:22 CEST 2012
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Hello,
the topic came up on the python-users list today. The raw string syntax has a minor inconsistency. The ru"" notation is a syntax error although we support rb"". Neither rb"" nor ru"" are supported on Python 2.7.
Python 3.3:
works: r"", ur"", br"", rb"" syntax error: ru""
Python 2.7:
works: r"", ur"", br"" syntax error: ru"", rb""
The ru"" notation isn't necessary for Python 2 compatibility but it's still an inconsistency. The docs [1] also state that 'r' is a prefix, not a suffix. On the other hand the lexical definition doesn't mention the u"" notation yet.
Christian
[1] http://docs.python.org/py3k/reference/lexical_analysis.html#string-and-bytes-literals
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